Commands tagged bash (749)


  • 4
    curl ipinfo.io/<ipaddress>
    coderholic · 2013-10-31 05:18:07 0
  • Randomly remaps the first 5 mouse buttons (left, middle, right, upscroll, downscroll) in X for some reasonably harmless trolling. Non-persistant unless added to ~/.xinitrc or similar. The 'shuf' command is present on most modern desktop distros. To reverse use xmodmap -e "pointer = 1 2 3 4 5"


    0
    xmodmap -e "pointer = $(shuf -i 1-5 | tr '\n' ' ')"
    lynks · 2013-10-23 16:02:04 0
  • "git grep" automatically excludes untracked files (e.g. compiler output) and files under .git directory. If no directory or file is given, it will recursively search through the current directory.


    0
    alias tasks='git grep -EI "TODO|FIXME"'
    lizardo · 2013-10-21 23:54:46 0
  • Place this in your .bashrc (or run it once) to set the `tasks` alias. Next time you enter `tasks` into a terminal, it will give you a list of all TODO and FIXME comments in the current directory and child directories, giving you a quick overview of what you still have to do!


    5
    alias tasks='grep --exclude-dir=.git -rEI "TODO|FIXME" . 2>/dev/null'
    joepie91 · 2013-10-17 16:40:10 0

  • 4
    ps -p $$
    maverick · 2013-10-17 10:45:22 2

  • 0
    _autoOptions() { local cur=${COMP_WORDS[COMP_CWORD]} COMPREPLY=( $(compgen -W "--fooOption --barOption -f -b" -- $cur) ) ;}; complete -F _autoOptions autoOptions
    totti · 2013-10-16 09:46:54 0
  • tstouch takes two arguments: a filename containing a timestamp, and an extended regular expression with the parenthesized section matching a timestamp of the form YYYYMMDDhhmm or YYYYMMDDhhmm.ss. It then touches the file with that timestamp. Show Sample Output


    2
    tstouch() { [[ $1 =~ $2 ]] && touch -t ${BASH_REMATCH[1]} $1; }
    bartonski · 2013-10-01 20:00:34 0

  • 0
    dpkg-query -Wf '${Installed-Size}\t${Status}\t${Package}\n' | sort -n | grep installed
    falcald · 2013-09-29 15:12:03 0
  • This type of join is clearly documented in the bash manual. Only the first character of IFS is used for the delimiter. Show Sample Output


    3
    (IFS=,; echo "${array[*]}")
    aspiers · 2013-09-25 10:36:38 0
  • This script can be used to download enclosed files from a RSS feed. For example, it can be used to download mp3 files from a podcasts RSS feed. Show Sample Output


    0
    wget -q -O- http://example-podcast-feed.com/rss | grep -o "<enclosure[ -~][^>]*" | grep -o "http://[ -~][^\"]*" | xargs wget -c
    talha131 · 2013-09-24 12:38:08 0

  • -1
    for ff in directory; do numLines=`wc -l $ff`; numLines=$(echo $numLines | sed 's/ .*//g'); min=$(sort -nrk 1 $ff | tail -1); if [ $numLines -gt 100 ]; then echo $min >> minValues; fi;done;
    user1234 · 2013-09-23 04:04:52 2
  • An entirely shell-based solution (should work on any bourne-style shell), more portable on relying on the rename command, the exact nature of which varies from distro to distro.


    3
    for f in ./*.xls; do mv "$f" "${f%.*}.ods"; done
    evilsoup · 2013-09-17 01:41:56 0
  • Bash's history expansion character, "!", has many features, including "!:" for choosing a specific argument (or range of arguments) from the history. The gist is any number after !: is the number of the argument you want, with !:1 being the first argument and !:0 being the command. See the sample output for a few examples. For full details search for "^HISTORY EXPANSION" in the bash(1) man page.    Note that this version improves on the previous function in that it handles arguments that include whitespace correctly. Show Sample Output


    10
    !:n
    hackerb9 · 2013-09-15 03:41:13 1
  • Simple and easy to remember, if it already exists then it just ignores it.


    8
    ln -s /BASE/* /TARGET/
    thehitman · 2013-09-12 18:47:35 0

  • 5
    rename 's/.xls/.ods/g' *.xls
    jedifu · 2013-09-12 13:42:56 0
  • [Click the "show sample output" link to see how to use this keystroke.]   Meta-p is one of my all time most used and most loved features of working at the command line. It's also one that surprisingly few people know about. To use it with bash (actually in any readline application), you'll need to add a couple lines to your .inputrc then have bash reread the .inputrc using the bind command:   echo '"\en": history-search-forward' >> ~/.inputrcecho '"\ep": history-search-backward' >> ~/.inputrcbind -f ~/.inputrc     I first learned about this feature in tcsh. When I switched over to bash about fifteen years ago, I had assumed I'd prefer ^R to search in reverse. Intuitively ^R seemed better since you could search for an argument instead of a command. I think that, like using a microkernel for the Hurd, it sounded so obviously right fifteen years ago, but that was only because the older way had benefits we hadn't known about.     I think many of you who use the command line as much as I do know that we can just be thinking about what results we want and our fingers will start typing the commands needed. I assume it's some sort of parallel processing going on with the linguistic part of the brain. Unfortunately, that parallelism doesn't seem to work (at least for me) with searching the history. I realize I can save myself typing using the history shortly after my fingers have already started "speaking". But, when I hit ^R in Bash, everything I've already typed gets ignored and I have to stop and think again about what I was doing. It's a small bump in the road but it can be annoying, especially for long-time command line users. Usually M-p is exactly what I need to save myself time and trouble.     If you use the command line a lot, please give Meta-p a try. You may be surprised how it frees your brain to process more smoothly in parallel. (Or maybe it won't. Post here and let me know either way. ☺) Show Sample Output


    9
    <Meta-p> (aka <ALT+P>)
    hackerb9 · 2013-09-10 17:13:02 3
  • This gets the Nth argument in the last line of your history file. This is useful where history is being written after each command, and you want to use arguments from the previous command in the current command, such as when doing copies/moving directories etc. I wrote this after getting irritated with having to continually type in long paths/arguments. You could also use $_ if all you want is the last argument. Show Sample Output


    0
    function garg () { tail -n 1 ${HISTFILE} | awk "{ print \$$1 }" }
    plasticphyte · 2013-09-10 04:07:46 0

  • 2
    du -hd1 | sort -hr
    while0pass · 2013-09-08 01:32:23 1
  • url can be like any one of followings: url="MejbOFk7H6c" url="http://youtu.be/MejbOFk7H6c" url="https://youtube.com/watch?feature=player_embedded&v=MejbOFk7H6c#t" url="//www.youtube.com/v/MejbOFk7H6c?hl=ru_RU&version=3&rel=0" url="http://www.youtube.com/embed/MejbOFk7H6c?feature=player_embedded" If url mismatching, whole url will be returned. Show Sample Output


    2
    sh -c 'url="http://youtu.be/MejbOFk7H6c"; vid="`for i in ".*youtu\.be/\([^\/&?#]\+\)" ".*youtu.\+v[=/]\([^\/&?#]\+\)" ".*youtu.\+embed/\([^\/&?#]\+\)"; do expr "${url}" : "${i}"; done`"; if [ -n "${vid}" ]; then echo ${vid}; else echo "${url}"; fi'
    qwertyroot · 2013-09-04 19:33:09 0
  • set BLOCK to "title" or any other HTML / RSS / XML tag and curl URL to get everything in-between e.g. some text


    0
    curl ${URL} 2>/dev/null|grep "<${BLOCK}>"|sed -e "s/.*\<${BLOCK}\>\(.*\)\<\/${BLOCK}\>.*/\1/g"
    c3w · 2013-08-31 14:53:54 0

  • -4
    function mkdcd () { mkdir "$1" && cd "$1" }
    shinokada · 2013-08-31 12:48:13 0
  • If you want avoid to be annoyed when playing your favourite video files with your video player, first run this command to stash wrong files (and test tricks to play these wrong files). Show Sample Output


    0
    for i in *.flv *.mkv *.avi; do mplayer -ao null -vo null -ss 0 -endpos 1 >/dev/null "$i" 2> >(grep -qi error && echo >&2 "$i seems bad"); done
    sputnick · 2013-08-20 22:23:11 0
  • Compares the md5 checksums of the contents of two directories, outputting the checksum and filename where any files differ. Shows only the file name, not the full path.


    1
    diff <(sort <(md5deep -b -r /directory/1/) ) <(sort <(md5deep -b -r /directory/2/)
    unixmonkey64021 · 2013-08-19 18:20:49 1
  • Run "ps -x" (process status) in the background every hour (in this example). The outputs of both "nohup" and "ps -x" are sent to the e-mail (instead of nohup.out and stdout and stderr). If you like it, replace "ps -x" by the command of your choice, replace 3600 (1 hour) by the period of your choice. You can run the command in the loop any time by killing the sleep process. For example ps -x 2925 ? S 0:00.00 sh -c unzip E.zip >/dev/null 2>&1 11288 ? O 0:00.00 unzip E.zip 25428 ? I 0:00.00 sleep 3600 14346 pts/42- I 0:00.01 bash -c while true; do ps -x | mail pascalv; sleep 3600; done 643 pts/66 Ss 0:00.03 -bash 14124 pts/66 O+ 0:00.00 ps -x kill 25428 You have mail in /mail/pascalv Show Sample Output


    1
    nohup bash -c "while true; do ps -x | mail pascalv@mmmmail.com; sleep 3600; done" | mail pascalv@mmmmail.com &
    pascalv · 2013-08-19 17:21:37 5
  • Compute the md5 checksums for the contents of two mirrored directories, then sort and diff the results. If everything matches, nothing is returned. Otherwise, any checksums which do not match, or which exist in one tree but not the other, are returned. As you might imagine, the output is useful only if no errors are found, because only the checksums, not filenames, are returned. I hope to address this, or that someone else will!


    1
    diff <(sort <(md5deep -r /directory/1/) |cut -f1 -d' ') <(sort <(md5deep -r /directory/2/) |cut -f1 -d' ')
    unixmonkey64021 · 2013-08-18 22:13:07 0
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