oneline commands

[!TIP]

cat and EOF

[!NOTE|label:references:]

  • Chapter 19. Here Documents
  • bash Heredoc
    • using heredoc with ssh
      ssh -T user@host.com << EOF
      echo "The current local working directory is: $PWD"
      echo "The current remote working directory is: \$PWD"
      EOF
      
  • * POSIX.1 states
    ...an operand naming a file can be specified as '-', which means to use the standard input instead of a named file ....
    
  • kubectl apply from stdin

    [!NOTE|label:references:]

    $ cat << 'EOF' | kubectl apply -f -
    ...
    ...
    EOF
    
    # or
    $ kubectl apply -f - << EOF
    ...
    ...
    EOF
    
  • git apply from stdin

    $ cat >> 'EOF' | git apply --inaccurate-eof --ignore-whitespace
    ...
    ...
    EOF
    
    # or
    $ git apply --inaccurate-eof --ignore-whitespace --stat << 'EOF'
    ...
    ...
    EOF
     install |    6 ++----
     1 file changed, 2 insertions(+), 4 deletions(-)
    
  • git apply from clipboard

    [!NOTE|label:references:]

    $ pbpaste | git apply
    
    $ xsel --clipboard --input | git apply
    # or
    $ xclip -selection clipboard -o | git apply
    
  • patch from stdin

    [!NOTE|label:references:]

    $ patch --dry-run --ignore-whitespace << 'EOF'
    ...
    ...
    EOF
    

while read from input

[!NOTE|label:references:]

$ while IFS=\| read -r col1 col2; do echo ">> $col1 .. $col2 <<"; done <<\INPUT
  a|b
  INPUT
>> a .. b <<

ssh

  • compress and ssh and extract

    $ tar cf - . | ssh elsewhere tar xf - -C /other/dir
    
  • tips

    [!NOTE|label:references:]

    # tips
    $ tar cfz - . | ssh otherhost "cd /mydir; tar xvzf -"
    # the z-flag to tar does compression. Or you can use -C to ssh:
    $ tar cf - . | ssh -C otherhost "cd /mydir; tar xvf -"
    

find and tar

$ find . -name builds -prune -o -type f -print | tar czf ~/m.tar.gz --files-from -

# or find with maxdepth
$ find . -type f -name "config.xml" -maxdepth 2 -prune -print | tar czf ~/config.xml.130.tar.gz --files-from -

# find with special name
$ find . -name config\.xml -type f -print | tar czf ~/m.tar.gz --files-from -

# and ssh and extract
$ tar cf - . | ssh -C otherhost "cd /mydir; tar xvf -"

find and rename

$ find -iname "*.sh" -exec rename "s/.sh$/.shell/" {} \; -print

find and sort

find and copy

[!TIP]

$ find . -type f -newermt '2023-10-16 00:00:00' -exec cp -a --parents -t /path/to/target "{}" \+

# or
$ diff=$(( ($(date --date "24-02-29" +%s) - $(date --date "231016" +%s) )/(60*60*24) ))
$ find . -type f -daystart -mtime -$((diff+1)) -exec cp -a --parents -t /path/to/target "{}" \+

download and extract

  • tar.gz

    $ curl -fsSL https://dlcdn.apache.org/maven/maven-3/3.9.5/binaries/apache-maven-3.9.5-bin.tar.gz | tar xzf - -C /path/to/target
    
  • tar.xz

    $ curl -fsSL https://ftp.gnu.org/gnu/glibc/glibc-2.38.tar.xz | tar -xJf - -C /path/to/target
    
  • zip

    $ curl -fsSL https://downloads.gradle.org/distributions/gradle-8.4-bin.zip | bsdtar xzf - -C /path/to/target
    

mirror website

$ wget --mirror --page-requisites --html-extension --convert-links $URL

# or https://www.linuxjournal.com/content/downloading-entire-web-site-wget
# wget --recursive --no-clobber --page-requisites --html-extension --convert-links --restrict-file-names=windows --domains website.org --no-parent sample.com

# or https://superuser.com/a/1415765/112396
$ wget --recursive --level 5 --no-clobber --page-requisites --adjust-extension --span-hosts --convert-links --restrict-file-names=windows --domains sample.com --no-parent sample.com

kubectl apply from stdin

$ cat << EOF | kubectl create -f -
apiVersion: v1
kind: Secret
metadata:
  name: mysecret
type: Opaque
data:
  username: $(echo -n 'admin' | base64)
  password: $(echo -n 'password' | base64)
EOF

sync mirror

[!NOTE]

$ rsync -aqzH --delay-updates --delete-after  msync.centos.org::CentOS /path/to/local/mirror/root

# stream 9
$ rsync -aqzH --delay-updates --delete-after rsync.stream.centos.org::CentOS-Stream-All /path/to/local/mirror/root

# or src
$ rsync -aqzH --delay-updates --delete-after rsync.stream.centos.org::CentOS-Stream-nosrc /path/to/local/mirror/root

# exclude debuginfo
$ rsync -aqzH --delay-updates --delete-after rsync.stream.centos.org::CentOS-Stream-nodebug /path/to/local/mirror/root

get all declare

[!NOTE|label:references:]

$ declare
$ declare -p
$ declare -xp

# or
$ typeset
$ typeset -p

# or
$ compgen -v
$ compgen -v | while read line; do echo $line=${!line};done
$ compgen -v | while read line; do declare -p $line; done

# or
$ export
$ printenv

[!NOTE|label:references:]

$ set -o posix ; set | awk -F '=' '{ print $1 }'

# or
$ env
$ env | awk -F '=' '{ print $1 }'
$ env | awk -F '=' '{ print $1 }' | tr '\n' ' '

# or
$ printenv

using string as variable name

[!NOTE|label:references:]

  • eval

    $ aa='echo me'
    $ var='aa'
    $ eval echo \$$var
    echo me
    
  • ${!var}

    $ var1="this is the real value"
    $ a="var1"
    $ echo "${!a}"
    this is the real value
    
  • more usage

    $ sunny='''
    \033[38;5;226m    \\   /    \033[0m
    \033[38;5;226m     .-.     \033[0m
    \033[38;5;226m  ― (   )\033[0m
    \033[38;5;226m     `-’     \033[0m
    \033[38;5;226m    /   \\    \033[0m
    '''
    
    $ fewClouds='''
    \033[38;5;226m   \\  /\033[0m
    \033[38;5;226m _ /\"\"\033[38;5;250m.-.    \033[0m
    \033[38;5;226m   \\_\033[38;5;250m(   ).  \033[0m
    \033[38;5;226m   /\033[38;5;250m(___(__) \033[0m
    
    '''
    
    $ codeMap=(
                 ["01"]="sunny"
                 ["02"]="fewClouds"
               )
    $ icon="$(/usr/bin/curl -sg "https://api.openweathermap.org/data/3.0/onecall?lat=37.3541132&lon=-121.955174&units=metric&exclude=hourly,daily,minutely,alerts&appid=${OWM_API_TOKEN}" | jq -r .current.weather[].icon)"
    $ echo ${icon}
    02n
    
    $ echo -e "${!codeMap["${icon:0:-1}"]}"
    
    using string as var name
    1.2.1.2.1 -- using string as var name

<<<, < <(..)

[!TIP]

  • < <( is Process Substitution
    • The difference between <(...) and >(...) is merely which way the redirections are done

< <(..) && > >(..)

[!NOTE]

  • process substitution
  • syntax

    $ command1 < <( command2 )
    # equals to
    $ command2 | command1
    
    # if read from file, then using `< /path/to/file`
    
  • SubShell

  • example:

    $ while read line; do echo "-- ${line} --"; done < <(ls -1)
    
    # equals to: http://mywiki.wooledge.org/BashFAQ/024
    $ ls -1 | while read line; do echo "-- ${line} --"; done
    # equals to
    $ ls -1 | xargs -n1 -i bash -c "echo \"-- {} --\""
    
    # equals to read from file via `< /path/to/file`
    $ ls -1 > ls.txt
    $ while read line; do echo "-- ${line} --"; done < ls.txt
    
$ wc < <(date)
    1       6      29

# same as:
$ date | wc
    1       6      29
  • < <(..)

    [!TIP|label:referencs:]

    • subshell
    • tips:

      # If commandA can read the data from stdin
      commandB | commandA                 # You can now get the exit code of commandB from PIPESTATUS.
      commandB > >(commandA)              # You can now get the exit code of commandB from $? (or by putting this in an if)
      
      # If commandA cannot read it from stdin, but requires a file argument
      commandB > >(commandA <(cat))       # Again, commandB's exit code is available from $?
      
      # You can also keep commandB's output in memory.  When you do this, you can get commandB's exit code from $? or put the assignment in an if
      b=$(commandB); commandA <<< "$b"    # Here, commandA reads commandB's output from stdin
      
    • common usage

      $ diff <(sort list1) <(sort list2)
      
      # or
      $ while read file; do
          echo -e "\n\033[1;33m${file}\n---\033[0m"
          sed -n "/<<<<<<< HEAD/,/>>>>>>> /!d;=;p" ${file}
          echo -e "\n\033[1;33m---\033[0m"
        done < <(git grep --no-color -l "<<<<<<< HEAD")
      
  • > >(..)

    [!TIP]

    • Process Substitution
      • >(...) is used less frequently; the most common situation is in conjunction with tee(1).
      • >(...) is handy when redirecting the output to multiple files, based on some criteria.
    # For example:
    $ some_command | tee >(grep A > A.out) >(grep B > B.out) >(grep C > C.out) > /dev/null
    

parameter substitution

EXPR DESCRIPTION
${variable-default} if variable is unset, use default
${variable=default} if variable is unset, set variable to default
${variable+alt} if variable is set, use alt, else use null string
${variable:-default} with ":[-=+]", condition takes also "declared but null"

arguments substitution

EXPR DESCRIPTION
$@
           p1 p2 p3 p4 p5 p6 
${@: 0}
 ./args.sh p1 p2 p3 p4 p5 p6 
${@: 1}
           p1 p2 p3 p4 p5 p6 
${@: 2}
              p2 p3 p4 p5 p6 
${@: 2:1}
              p2             
${@: 2:2}
              p2 p3          
${@: -2}
                       p5 p6 
${@: -2:1}
                       p5    
${*: -1} or ${@: $#}
                          p6 
${@: 1:$#-1}
           p1 p2 p3 p4 p5    
  • sample with uncertain parameters

    local opt=''
    local loop=true
    local path params
    
    while ${loop} && [[ $# -gt 0 ]]; do
      case "$1" in
        -*) opt+="$1 "; shift;;
         *) loop=false       ;;
      esac
    done
    
    if [[ 1 = "$#" ]]; then
      path=''
      params="$1"
    else
      path=${*: -1}
      params=${*:1:$#-1}
    fi
    
    sample script c.sh
    echo '---------------- before shift -------------------'
    echo ".. \$# : $#"
    echo ".. \$@ : $@"
    echo ".. \$* : $*"
    
    echo '---------------- after shift -------------------'
    opt=''
    ss=''
    loop=true
    
    while $loop && [[ $# -gt 0 ]]; do
      case "$1" in
        -*) opt+="$1 "; shift;;
         *) loop=false       ;;
      esac
    done
    
    echo ".. \$#   : $#"
    echo ".. \$@   : $@"
    echo ".. \$*   : $*"
    echo ".. \$opt : $opt"
    
    if [[ 0 = "$#" ]]; then
      echo -e "\033[0;33mERROR: must provide at least one non-opt param\033[0m"
      exit 2
    elif [[ 1 = "$#" ]]; then
      path=''
      params="$1"
    else
      path=${*: -1}
      params=${*:1:$#-1}
    fi
    
    echo '---------------- result -------------------'
    echo ">> opt    : ${opt}"
    echo ">> params : ${params}"
    echo ">> path   : ${path}"
    
    result
    $ ./c.sh -1 -2 --3-4 a b c d e
    ---------------- before shift -------------------
    .. $# : 8
    .. $@ : -1 -2 --3-4 a b c d e
    .. $* : -1 -2 --3-4 a b c d e
    ---------------- after shift -------------------
    .. $#   : 5
    .. $@   : a b c d e
    .. $*   : a b c d e
    .. $opt : -1 -2 --3-4
    .. $ss  : a b c d e
    ---------------- result -------------------
    >> opt    : -1 -2 --3-4
    >> params : a b c d
    >> path   : e
    
    $ ./c.sh aa bb
    ---------------- before shift -------------------
    .. $# : 2
    .. $@ : aa bb
    .. $* : aa bb
    ---------------- after shift -------------------
    .. $#   : 2
    .. $@   : aa bb
    .. $*   : aa bb
    .. $opt :
    .. $ss  : aa bb
    ---------------- result -------------------
    >> opt    :
    >> params : aa
    >> path   : bb
    
    $ ./c.sh -1
    ---------------- before shift -------------------
    .. $# : 1
    .. $@ : -1
    .. $* : -1
    ---------------- after shift -------------------
    .. $#   : 0
    .. $@   :
    .. $*   :
    .. $opt : -1
    ERROR: must provide at least one non-opt param
    

quotas

  • ${@@Q}

    # a.sh
    line="${@@Q}"
    echo $line
    
    $ bash a.sh -a -b --c='1 2 3'
    '-a' '-b' '--c=1 2 3'
    
    # https://stackoverflow.com/a/39463371/2940319
    $ expand-q() { for i; do echo ${i@Q}; done; }
    $ expand-q -a -b --c='1 2 3'
    '-a'
    '-b'
    '--c=1 2 3'
    
    # https://stackoverflow.com/a/72745869/2940319
    function quote() {
      local QUOTED_ARRAY=()
      for ARGUMENT; do
        case ${ARGUMENT} in
          --*=*)
            QUOTED_ARRAY+=( "${ARGUMENT%%=*}=$(printf "%q" "${ARGUMENT#*=}")" )
            shift
          ;;
          *)
            QUOTED_ARRAY+=( "$(printf " %q" "${ARGUMENT}")" )
          ;;
        esac
      done
      echo ${QUOTED_ARRAY[@]}
    }
    
    ARGUMENTS="$(quote "${@}")"
    echo "${ARGUMENTS}"
    
  • printf " %q" "${@}"

    [!NOTE]

    while test -n "$1"; do
      case "$1" in
        -- ) shift; GIT_OPT=$(printf " %q" "${@}"); break ;;
      esac
    done
    GIT_OPT="${GIT_OPT#\ \'\'}"
    
    # https://stackoverflow.com/a/39463371/2940319
    $ params-q() { printf "%q\n" "$@"; }
    $ params-q -a -b --c='1 2 3'
    -a
    -b
    --c=1\ 2\ 3
    
  • String replacement

    [!TIP]

    # a.sh
    while test -n "$1"; do
      case "$1" in
        -- ) shift; GIT_OPT="$@";;
        *  ) shift;;
      esac
    done
    
    GIT_OPT=$(echo "${GIT_OPT}" |
                 sed -r 's/\s+--/\n--/g' |
                 sed -r "s/^([^=]+)=(.+)$/\1='\2'/g" |
                 sed -e 'N;s/\n/ /'
              )
    echo $GIT_OPT
    
    $ bash a.sh -a -b -- --c='1 2 3'
    --c='1 2 3'
    
    # https://stackoverflow.com/a/8723305/2940319
    # a.sh
    C=''
    for i in "$@"; do
        i="${i//\\/\\\\}"
        C="$C \"${i//\"/\\\"}\""
    done
    echo $C
    
    $ bash ~/a.sh -a -b --c='1 2 3'
    "-a" "-b" "--c=1 2 3"
    

string manipulations

EXPR DESCRIPTION
${#string} length
${string:position} substring, or positional parameter with $* and $#
${string:position:length} substring
${string#substring} deletes shortest match of $substring from front of $string
${string##substring} same but longest match
${string%substring} shortest from back
${string%%substring} longest from back
${string/substring/replacement} replace first match
${string//substring/replacement} replace all matches
${string/#substring/replacement} replace if matches front end of $string
${string/%substring/replacement} replace if matches back end of $string
${var^} uppercase first char
${var^^} uppercase all chars
${var,} lowercase first char
${var,,} lowercase all chars

compound comparison

SC2155

  • problematic code:
    ([ "$x" ] || [ "$y" ]) && [ "$z" ]
    
  • correct code:
    { [ "$x" ] || [ "$y" ]; } && [ "$z" ]
    
  • example

SC2155

  • problematic code:
    export foo="$(mycmd)"
    
  • correct code:
    foo="$(mycmd)"
    export foo
    

escape code

[!TIP] references:

ESCAPE CODE LANGUAGE DESCRIPTION
\x1b Node.js hex char
\x1b Node.js w/ TS hex char
\u001b Python hex char
\033 GNU Cpp octal char
\033 ANSI C octal char
\033 POSIX-compliant shells octal char
\e Bash -
\c[ - control char

echo

echo var name from variable

[!NOTE]

  • typeset

    $ typeset -p "${foo}"$
    declare -- bar="baz"
    
  • eval \$$

    $ eval echo \$$foo
    baz
    
    • more:
      $ echo \$$foo
      $bar
      # or
      $ echo '$'$foo
      $bar
      
  • {!parameter}

    $ echo "${!foo}"
    baz
    

echo var name

[!NOTE]

  • typeset

    $ typeset -p c2
    declare -- c2="cc"
    
  • {!parameter@}

    $ echo "${!c@}"
    c1 c2
    
    $ echo "${!a@}"
    a1 a2
    
  • more

    superEcho() {
      echo "$1 = ${!1}"
    }
    
    $ superEcho foo
    foo = bar
    $ superEcho bar
    bar = baz
    

bash completion

[!NOTE|label:references]

  • print existing completion

    $ complete -p vim
    complete -o bashdefault -o default -F _fzf_opts_completion vim
    
    $ complete -p ffs
    complete -o bashdefault -o default -o nosort -F _fd ffs
    
    $ complete -p ff
    complete -o bashdefault -o default -o nosort -F _fd ff
    
  • remove completion

    $ complete -p vim
    complete -o bashdefault -o default -F _fzf_opts_completion vim
    
    $ complete -r vim
    
    $ complete -p vim
    -bash: complete: vim: no completion specification
    
  • list all completions

    $ complete
    
    # show all commands
    $ compgen -c
    
    • more

      # aliases
      $ compgen -a
      
      # built-ins
      $ compgen -b
      
      # keywords
      $ compgen -k
      
      # functions
      $ compgen -A function
      
      # list all the above
      $ compgen -A function -abck
      
    details...
    $ complete
    complete -o default -F _quotaon quotaon
    complete -o default -F _fzf_path_completion mv
    complete -F _postcat postcat
    complete -o default -o nospace -v -F _fzf_var_completion printenv
    complete -o default -F __start_kubectl kcn
    complete -F _filedir_xspec mpg321
    complete -F _filedir_xspec tex
    complete -F _make gmake
    complete -o bashdefault -o default -F _fzf_path_completion diff3
    complete -o default -F _ansible ansible
    complete -o default -F _fzf_path_completion head
    complete -o default -F __start_kubectl kt1
    complete -o default -F __start_kubectl kt2
    complete -o default -F _fzf_path_completion uniq
    complete -F _command else
    complete -o default -F __start_kubectl kt3
    complete -F _ldapdelete ldapdelete
    complete -F _configure configure
    complete -F _filedir_xspec freeamp
    complete -F _lzma lzma
    complete -o default -F __start_kubectl kcc
    complete -F _filedir_xspec gqmpeg
    complete -F _filedir_xspec texi2html
    complete -o default -F _complete_groovydoc groovydoc
    complete -F _filedir_xspec hbpp
    complete -F _xsltproc xsltproc
    complete -F _filedir_xspec jadetex
    complete -F _docker droot
    complete -o default -F _longopt mkfifo
    complete -o bashdefault -o default -F _fzf_path_completion svn
    complete -o default -F _fzf_path_completion tee
    complete -F _javaws javaws
    complete -F _mktemp mktemp
    complete -F _filedir_xspec rpm2cpio
    complete -F _docker dvi
    complete -F _make pmake
    complete -o default -F _repquota repquota
    complete -F _filedir_xspec hbrun
    complete -F _autoscan autoscan
    complete -o default -F __start_kubectl kubectl
    complete -o default -F _screen screen
    complete -F _filedir_xspec ps2pdf14
    complete -o default -F _fzf_path_completion grep
    complete -F _fzf_path_completion vi
    complete -F _autoreconf autoheader
    complete -F _composite composite
    complete -F _fzf_path_completion bat
    complete -F _filedir_xspec ps2pdf13
    complete -o default -F _longopt objdump
    complete -F _filedir_xspec ps2pdf12
    complete -o default -F _longopt sha1sum
    complete -o default -F _longopt cut
    complete -F _filedir_xspec lyx
    complete -o bashdefault -o default -F _fzf_path_completion file
    complete -F _gcc gpc
    complete -F _filedir_xspec latex
    complete -o default -F _look look
    complete -F _gradle gradlew.bat
    complete -o bashdefault -o default -F _fzf_path_completion hx
    complete -F _filedir_xspec poedit
    complete -F _fzf_path_completion view
    complete -o bashdefault -o default -F _fzf_path_completion dirname
    complete -F _function typeset
    complete -o bashdefault -o default -F _fzf_path_completion hg
    complete -F _command nohup
    complete -a -F _fzf_alias_completion unalias
    complete -F _vipw vipw
    complete -g groupdel
    complete -F _make gnumake
    complete -u groups
    complete -F _filedir_xspec chromium-browser
    complete -F _filedir_xspec opera
    complete -F _filedir_xspec kbabel
    complete -F _fzf_host_completion telnet
    complete -F _gcc g77
    complete -F _filedir_xspec bzme
    complete -o bashdefault -o default -F _fzf_complete_ssh ssh
    complete -F _command vsound
    complete -c which
    complete -F _fzf_path_completion tar
    complete -o default -F _longopt m4
    complete -F _filedir_xspec madplay
    complete -o default -F _fzf_opts_completion fzf-tmux
    complete -F _docker drm
    complete -F _filedir_xspec dviselect
    complete -o default -F _fzf_path_completion cp
    complete -F _mas mas
    complete -F _animate animate
    complete -F _man whatis
    complete -o default -F _complete_groovysh groovysh.sh
    complete -F _filedir_xspec evince
    complete -o bashdefault -o default -F _brew brew
    complete -F _docker dcleanall
    complete -F _filedir_xspec realplay
    complete -o default -F _longopt strip
    complete -o bashdefault -o default -o nospace -F __git_wrap__gitk_main gitk
    complete -v readonly
    complete -o nospace -F _fzf_path_completion rsync
    complete -F _ctest ctest
    complete -o nospace -F _fzf_dir_completion cd
    complete -o default -F _complete_groovydoc groovydoc.bash
    complete -F _known_hosts showmount
    complete -F _filedir_xspec kdvi
    complete -o default -F _longopt tac
    complete -F _ldapaddmodify ldapmodify
    complete -F _filedir_xspec elinks
    complete -F _known_hosts fping
    complete -o default -F _longopt env
    complete -o default -F _quota quota
    complete -F _gradle ./gradlew
    complete -u chfn
    complete -F _docker drp
    complete -F _filedir_xspec compress
    complete -F _filedir_xspec pdfjadetex
    complete -F _filedir_xspec kghostview
    complete -F _man man
    complete -F _filedir_xspec pbunzip2
    complete -o default -F _brctl brctl
    complete -c type
    complete -F _ldapcompare ldapcompare
    complete -F _known_hosts ssh-installkeys
    complete -F _filedir_xspec iceweasel
    complete -F _filedir_xspec gtranslator
    complete -F _fzf_path_completion unzip
    complete -o default -F _longopt expand
    complete -o default -F _complete_groovyConsole groovyConsole.bash
    complete -o bashdefault -o default -o nospace -F _fzf_path_completion git
    complete -F _filedir_xspec lrunzip
    complete -o default -F _fzf_path_completion ln
    complete -F _command aoss
    complete -F _docker drps
    complete -F _filedir_xspec ggv
    complete -F _filedir_xspec oomath
    complete -F _filedir_xspec dvipdfmx
    complete -o default -F _fzf_path_completion ld
    complete -F _fzf_path_completion gunzip
    complete -F _filedir_xspec makeinfo
    complete -F _filedir_xspec okular
    complete -o default -F _complete_groovysh groovysh
    complete -F _ldapsearch ldapsearch
    complete -F _command xargs
    complete -j -P '"%' -S '"' jobs
    complete -o default -F _complete_groovy groovy.sh
    complete -F _filedir_xspec oowriter
    complete -o bashdefault -o default -F _fzf_path_completion emacsclient
    complete -F _cpack cpack
    complete -o default -F _fzf_path_completion tail
    complete -o default -F _longopt unexpand
    complete -o default -F _longopt netstat
    complete -F _docker dexe
    complete -o default -F _fzf_path_completion ls
    complete -F _filedir_xspec epiphany
    complete -o nospace -F __gio gio
    complete -o bashdefault -o default -F _fzf_path_completion nvim
    complete -o dirnames -o nospace -F _fzf_dir_completion pushd
    complete -F _filedir_xspec acroread
    complete -o default -o nospace -v -F _fzf_var_completion unset
    complete -F _postmap postalias
    complete -F _nmap nmap
    complete -o default -F _longopt csplit
    complete -F _known_hosts rsh
    complete -F _filedir_xspec sxemacs
    complete -F _command exec
    complete -F _filedir_xspec aviplay
    complete -F _ldapmodrdn ldapmodrdn
    complete -F _filedir_xspec rgvim
    complete -F _chsh chsh
    complete -F _autoconf autoconf
    complete -o default -F _longopt nm
    complete -o default -F _longopt nl
    complete -o default -F _complete_grape grape.bash
    complete -o nospace -F _user_at_host ytalk
    complete -F _fzf_proc_completion kill
    complete -F _fzf_path_completion java
    complete -F _cmake cmake
    complete -u sux
    complete -F _cancel cancel
    complete -F _filedir_xspec znew
    complete -o default -F _complete_groovydoc groovydoc.sh
    complete -F _id id
    complete -o default -F _longopt paste
    complete -F _ldapaddmodify ldapadd
    complete -F _docker dip
    complete -o bashdefault -F _perldoc perldoc
    complete -F _filedir_xspec kwrite
    complete -F _root_command really
    complete -o default -F _complete_groovyc groovyc.bash
    complete -o bashdefault -o default -o nospace -F __git_wrap__tig_main tig
    complete -F _filedir_xspec firefox
    complete -o bashdefault -o default -F _fzf_path_completion open
    complete -F _ip ip
    complete -o default -F __start_kubectl klc
    complete -F _docker drit
    complete -F _filedir_xspec dvipdfm
    complete -F _filedir_xspec ly2dvi
    complete -F _filedir_xspec oodraw
    complete -F _docker drun
    complete -F _import import
    complete -o default -F __start_kubectl kcswatch
    complete -F _gzip pigz
    complete -o default -F __start_kubectl kln
    complete -F _autoscan autoupdate
    complete -F _known_hosts dig
    complete -o nospace -F _user_at_host talk
    complete -F _filedir_xspec xemacs
    complete -F _docker dls
    complete -o nospace -F _dd dd
    complete -F _jarsigner jarsigner
    complete -F _filedir_xspec kpdf
    complete -F _man apropos
    complete -o default -F _longopt df
    complete -F _command eval
    complete -F _docker di
    complete -F _postsuper postsuper
    complete -F _postconf postconf
    complete -F _filedir_xspec bibtex
    complete -o default -F _pip_completion pip
    complete -F _docker dclr
    complete -F _postfix postfix
    complete -F _fzf_path_completion chown
    complete -F _filedir_xspec netscape
    complete -o default -F _longopt wget
    complete -F _command do
    complete -F _cargo cargo
    complete -F _gradle gradle
    complete -F _pgrep pgrep
    complete -F _filedir_xspec gview
    complete -F _filedir_xspec lzfgrep
    complete -o bashdefault -o default -o nosort -F _fd ffs
    complete -F _filedir_xspec lzless
    complete -o default -F _fzf_path_completion du
    complete -F _renice renice
    complete -F _lsof lsof
    complete -F _docker dv
    complete -F _known_hosts tracepath
    complete -o default -F __start_kubectl kit
    complete -o default -F _fzf_path_completion wc
    complete -F _fzf_path_completion gzip
    complete -F _newgrp newgrp
    complete -o default -F _ansible-galaxy ansible-galaxy
    complete -F _filedir_xspec cdiff
    complete -F _fzf_path_completion emacs
    complete -F _filedir_xspec zipinfo
    complete -F _docker dcleani
    complete -F _filedir_xspec google-chrome
    complete -F _gcc c++
    complete -F _crontab crontab
    complete -F _filedir_xspec rview
    complete -A shopt shopt
    complete -F _docker dcleanc
    complete -F _root_command sudo
    complete -F _killall pkill
    complete -F _fzf_path_completion javac
    complete -F _fzf_path_completion ftp
    complete -o default -F _longopt uname
    complete -o bashdefault -o default -F _rg rg
    complete -F _known_hosts ping
    complete -F _filedir_xspec wine
    complete -F _filedir_xspec galeon
    complete -F _filedir_xspec pdflatex
    complete -F _docker dex
    complete -F _known_hosts rlogin
    complete -o default -F _fzf_opts_completion fzf
    complete -F _filedir_xspec portecle
    complete -o default -F _longopt sha384sum
    complete -o default -F _fzf_path_completion rm
    complete -F _filedir_xspec modplugplay
    complete -F _ri ri
    complete -o default -F _quotaoff quotaoff
    complete -F _filedir_xspec dillo
    complete -F _filedir_xspec fbxine
    complete -F _filedir_xspec lokalize
    complete -F _root_command gksudo
    complete -F _command nice
    complete -o default -F _longopt tr
    complete -o default -F _npm_completion npm
    complete -F _filedir_xspec oocalc
    complete -o default -F _complete_groovyc groovyc.sh
    complete -F _gradle gradlew
    complete -o default -F _longopt sha256sum
    complete -F _root_command gksu
    complete -F _filedir_xspec qiv
    complete -F _chgrp chgrp
    complete -F _filedir_xspec ps2pdfwr
    complete -o default -F _edquota edquota
    complete -F _filedir_xspec harbour
    complete -o bashdefault -o default -F _fzf_path_completion basename
    complete -o default -F _longopt ptx
    complete -F _filedir_xspec dvitype
    complete -o nospace -F __gsettings gsettings
    complete -F _gradle ./gradlew.bat
    complete -F _known_hosts traceroute
    complete -F _fzf_path_completion bzip2
    complete -j -P '"%' -S '"' fg
    complete -o bashdefault -o default -o nosort -F _fd ff
    complete -F _convert convert
    complete -F _filedir_xspec unpigz
    complete -o default -F _complete_groovy groovy
    complete -o bashdefault -o default -o nosort -F _fd fd
    complete -F _filedir_xspec mozilla
    complete -F _filedir_xspec dvips
    complete -o default -F _longopt who
    complete -F _montage montage
    complete -F _complete compgen
    complete -F _filedir_xspec ps2pdf
    complete -F _filedir_xspec gpdf
    complete -F _complete complete
    complete -F _filedir_xspec texi2dvi
    complete -o dirnames -F _umount umount
    complete -F _function function
    complete -o bashdefault -o default -F _fzf_path_completion mvim
    complete -o default -F _fzf_path_completion less
    complete -o default -F _longopt mknod
    complete -F _command padsp
    complete -F _passwd passwd
    complete -F _filedir_xspec kate
    complete -F _pkg_config pkg-config
    complete -o default -F _longopt bison
    complete -F _filedir_xspec mozilla-firefox
    complete -F _filedir_xspec kid3-qt
    complete -o default -F _longopt od
    complete -F _fzf_path_completion bunzip2
    complete -o default -o dirnames -F _mount mount
    complete -F _function declare
    complete -F _filedir_xspec pdftex
    complete -F _ag ag
    complete -o default -o nospace -F _fzf_var_completion export
    complete -F _vipw vigr
    complete -o default -F _ansible-doc ansible-doc
    complete -F _nslookup nslookup
    complete -F _ssh slogin
    complete -o nospace -F _alias alias
    complete -F _fzf_path_completion gvim
    complete -F _filedir_xspec kaffeine
    complete -F _stream stream
    complete -F _docker drdp
    complete -o default -F _complete_grape grape.sh
    complete -F _filedir_xspec mpg123
    complete -F _fzf_path_completion find
    complete -F _filedir_xspec lzegrep
    complete -o default -F _ansible-pull ansible-pull
    complete -o default -F _longopt split
    complete -o bashdefault -o default -F _fzf_path_completion zip
    complete -F _ssh autossh
    complete -F _filedir_xspec xv
    complete -o default -F _longopt fold
    complete -F _known_hosts mtr
    complete -o bashdefault -o default -F _fzf_path_completion ruby
    complete -o nospace -F _fzf_path_completion scp
    complete -F _known_hosts ping6
    complete -F _filedir_xspec timidity
    complete -F _filedir_xspec xdvi
    complete -F _filedir_xspec xfig
    complete -F _filedir_xspec xpdf
    complete -o default -F _longopt indent
    complete -o bashdefault -o default -F _fzf_path_completion chmod
    complete -o nospace -F _user_at_host finger
    complete -o bashdefault -o default -o nospace -F _python_argcomplete pipx
    complete -F _ktutil ktutil
    complete -F _xz xz
    complete -F _filedir_xspec oobase
    complete -F _docker dpa
    complete -F _fzf_path_completion perl
    complete -F _root_command kdesudo
    complete -F _docker drmi
    complete -F _filedir_xspec ogg123
    complete -F _filedir_xspec lzgrep
    complete -u w
    complete -F _filedir_xspec ee
    complete -F _sh sh
    complete -o default -F __start_kubectl kubecolor
    complete -F _docker dps
    complete -F _filedir_xspec gharbour
    complete -u su
    complete -o default -F _complete_grape grape
    complete -o default -F _longopt irb
    complete -F _known_hosts host
    complete -o default -F __start_kubectl k
    complete -o bashdefault -o default -F _fzf_path_completion ex
    complete -o default -F _complete_groovyConsole groovyConsole
    complete -o nospace -F __gdbus gdbus
    complete -F _sysctl sysctl
    complete -F _sqlite3 sqlite3
    complete -o default -F _iconv iconv
    complete -F _command tsocks
    complete -F _docker d
    complete -F _xmllint xmllint
    complete -o default -F _fzf_path_completion diff
    complete -F _ldapwhoami ldapwhoami
    complete -F _bzip2 pbzip2
    complete -F _postmap postmap
    complete -o bashdefault -o filenames -F _pandoc pandoc
    complete -F _filedir_xspec bzcat
    complete -F _filedir_xspec unlzma
    complete -F _filedir_xspec dragon
    complete -F _xzdec xzdec
    complete -o default -F _longopt shar
    complete -F _filedir_xspec ooimpress
    complete -F _cpio cpio
    complete -F _filedir_xspec xanim
    complete -o default -F _complete_groovysh groovysh.bash
    complete -o default -F _ansible-vault ansible-vault
    complete -j -P '"%' -S '"' disown
    complete -F _filedir_xspec xine
    complete -o default -F _longopt bash
    complete -o default -F _longopt md5sum
    complete -o bashdefault -o default -F _fzf_path_completion source
    complete -F _filedir_xspec amaya
    complete -F _filedir_xspec gv
    complete -F _make make
    complete -o default -F _fzf_path_completion curl
    complete -A stopped -P '"%' -S '"' bg
    complete -o default -F __start_kubectl kubeproxy
    complete -F _filedir_xspec kid3
    complete -o nospace -F __gresource gresource
    complete -F _filedir_xspec lilypond
    complete -o default -F _longopt bc
    complete -F _identify identify
    complete -F _filedir_xspec modplug123
    complete -o default -F __start_kubectl k4
    complete -F _pack200 pack200
    complete -A binding bind
    complete -o default -F _setquota setquota
    complete -b builtin
    complete -F _unpack200 unpack200
    complete -o default -F _quotacheck quotacheck
    complete -F _filedir_xspec pbzcat
    complete -F _known_hosts tracepath6
    complete -o default -F _complete_groovyc groovyc
    complete -o default -F _longopt shasum
    complete -F _command ltrace
    complete -o default -F __start_kubectl k3
    complete -F _fzf_path_completion gcc
    complete -F __app gapplication
    complete -o bashdefault -o default -F _fzf_path_completion xdg-open
    complete -o default -F _ansible-playbook ansible-playbook
    complete -u write
    complete -F _known_hosts traceroute6
    complete -F _fzf_path_completion jar
    complete -o default -F _longopt date
    complete -F _gcc gcj
    complete -F _filedir_xspec rgview
    complete -o default -F _fzf_path_completion cat
    complete -o default -F _fzf_path_completion awk
    complete -o default -F _complete_groovyConsole groovyConsole.sh
    complete -o default -F _longopt sha512sum
    complete -F _filedir_xspec unxz
    complete -o default -F _longopt seq
    complete -o default -F _longopt mkdir
    complete -F _filedir_xspec rvim
    complete -o default -F __start_kubectl krn
    complete -o default -F _longopt sha224sum
    complete -A helptopic help
    complete -F _fzf_path_completion sftp
    complete -A setopt set
    complete -o default -F __start_kubectl krc
    complete -F _compare compare
    complete -F _tmux tmux
    complete -F _ssh_copy_id ssh-copy-id
    complete -o default -F _fzf_path_completion sort
    complete -o default -F _longopt pr
    complete -o default -F _longopt colordiff
    complete -o default -F _fzf_path_completion patch
    complete -F _fzf_path_completion g++
    complete -o bashdefault -o default -F _fzf_path_completion python
    complete -F _conjure conjure
    complete -F _ldappasswd ldappasswd
    complete -F _filedir_xspec playmidi
    complete -o default -F __start_kubectl kcEvicted
    complete -o default -F _openssl openssl
    complete -o default -F _longopt fmt
    complete -o default -F _fzf_path_completion sed
    complete -F _tcpdump tcpdump
    complete -F _javadoc javadoc
    complete -F _filedir_xspec lzcat
    complete -o default -F _longopt gperf
    complete -F _command time
    complete -F _filedir_xspec zcat
    complete -F _mogrify mogrify
    complete -F _display display
    complete -F _root_command fakeroot
    complete -o default -F _complete_groovy groovy.bash
    complete -F _filedir_xspec lynx
    complete -u slay
    complete -F _filedir_xspec uncompress
    complete -F _autoreconf autoreconf
    complete -F _filedir_xspec xzcat
    complete -o default -F _fzf_dir_completion rmdir
    complete -F _filedir_xspec slitex
    complete -o bashdefault -o default -F _fzf_opts_completion vim
    complete -F _filedir_xspec aaxine
    complete -F _filedir_xspec advi
    complete -o bashdefault -o default -F _fzf_path_completion more
    complete -o default -F _longopt units
    complete -F _docker dcleanfull
    complete -o default -F _longopt touch
    complete -F _filedir_xspec lzmore
    complete -F _command then
    complete -F _command command
    complete -F _docker dkill
    complete -o default -F __start_kubectl kd
    complete -F _known_hosts fping6
    complete -u runuser
    complete -F _filedir_xspec dvipdf
    complete -o default -F __start_kubectl kc
    complete -F _gradle gradle.bat
    

osx

[!NOTE]

$ brew install bash-completion

$ echo "[ -f /usr/local/etc/bash_completion  ] && . /usr/local/etc/bash_completion" >> ~/.bash_profile
$ cat ~/.bash_profile
[ -f /usr/local/etc/bash_completion ] && . /usr/local/etc/bash_completion
  • to check link of bash-completion

    $ brew unlink bash-completion --dry-run
    Would remove:
    /usr/local/etc/bash_completion
    /usr/local/etc/bash_completion.d/abook
    /usr/local/etc/bash_completion.d/ant
    ...
    
  • add more completion files

    $ fd --gen-completions | sudo tee /usr/local/etc/bash_completion.d/fd
    
  • more

    $ brew search completion
    ==> Formulae
    apm-bash-completion       docker-completion         open-completion           stormssh-completion
    bash-completion ✔         fabric-completion         packer-completion         t-completion
    bash-completion@2         gem-completion            pip-completion            tmuxinator-completion
    boom-completion           gradle-completion ✔       rails-completion          vagrant-completion
    brew-cask-completion ✔    grunt-completion          rake-completion           wp-cli-completion
    bundler-completion        kitchen-completion        ruby-completion           yarn-completion
    cap-completion            launchctl-completion      rustc-completion          zsh-completions
    conda-zsh-completion      maven-completion          sonar-completion
    django-completion         mix-completion            spring-completion
    
    ==> Casks
    compositor
    

linux

  • enable

    if ! shopt -oq posix; then
      if [ -f /usr/share/bash-completion/bash_completion ]; then
        . /usr/share/bash-completion/bash_completion
      elif [ -f /etc/bash_completion ]; then
        . /etc/bash_completion
      fi
    fi
    
  • add more completion files

    $ fd --gen-completions | sudo tee /usr/share/bash-completion/completions/fd
    
    • centos
      $ fd --gen-completions | sudo tee /etc/bash_completion.d/fd
      

tricky

alias for sudo

[!TIP|label:references:]

alias sudo='sudo '

check file text or binary

[!NOTE]

$ find . -type f -print0 | perl -0nE 'say if -f and -s _ and -T _'

# verify
$ find . -type f -print0 | perl -0nE 'say if -f and -s _ and -T _' | grep -a -E '\.db$'
Copyright © marslo 2020-2023 all right reserved,powered by GitbookLast Modified: 2024-03-12 15:01:28

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