All commands (14,187)

  • Read a gzipped text file directly with less.

    There is no need to 'zcat textfile.gz | less' with newer distros. This is useful for reading archived log files without having to extract, read, and zip when done.


    -5
    less textfile.gz
    allbad · 2009-03-15 23:51:17 24
  • reloads sound when it stop playing

    if you lose your sound, this will restart alsa and you will get your sound back


    -5
    sudo alsa force-reload
    oreo · 2009-02-16 03:30:13 169
  • Play newest or random YouTube video


    -5
    oumou sangare
    gabougabou · 2010-04-12 21:45:02 5
  • fb


    -5
    lynx -useragent=Opera -dump 'http://www.facebook.com/ajax/typeahead_friends.php?u=4&__a=1' |gawk -F'\"t\":\"' -v RS='\",' 'RT{print $NF}' |grep -v '\"n\":\"' |cut -d, -f2
    pdan_23 · 2010-04-13 12:44:08 5
  • Network Information


    -5
    ntop
    theIndianMaiden · 2009-08-16 05:24:31 4
  • glob /mnt

    _ff(){ cd /mnt; echo /mnt/*/* |sed ' s/ \/mnt\//\&/g; '|sed '/'"$1"'/!d'; cd -; } ff(){ case $# in 0) echo "usage: ff glob [sed-cmds] [--|var-name]" ;; 1) _ff $1 |sed = ;; [2-9]) case $2 in --) _ff $1 |less -SN ;; *) _ff $1 |sed -n ''"$2"''|tr '\n' '\040' |sed 's/.*/export '"$3"'=\"&/;s/=\" /=\"/;s/ $/\"/' > $HOME/.ff; case $# in 3) . $HOME/.ff ;; esac; sed ' s/export .*=\"/\$'"$3"' = \"/;' $HOME/.ff;\ ;; esac ;; esac; } v(){ local a=$HOME; sed ' s/export /less -n \$/; s/=.*//; ' $a/.ff > $a/.v ; . $a/.v ; } Another approach using ls(1) lsl(){ _lsl () { ls -l $3 /mnt/*/$1* 2>/dev/null; }; case $# in 0) echo "usage: lsl pat [ls-options|result-no]"; echo "usage: lsle pat [sed-cmds]" ;; 1) _lsl $1 |sed = ;; 2) case $2 in -*) _lsl $1 $@;; *) _lsl $1 |sed 's/.* //; '"$2"'!d; '"$2"'q' > $HOME/.lsl ; export v=$(sed 1q $HOME/.lsl); echo \$v = $v ;; esac ;; esac; } exp(){ echo "%s/\$/ /"; echo "%j"; echo "s/^/export v=\""; echo "s/\$/\""; echo "s/ \"\$/\""; echo "."; echo "wq"; } lsle(){ lsl $1 -1 |sed $2 > .lsl&& exp |ed -s .lsl >&-&& . .lsl&& echo \$v = $v; }


    -5
    _ff(){ cd /mnt;echo /mnt/*/* |sed 's/ \/mnt\//\&/g' |sed '/'"$1"'/!d'; cd -;}
    argv · 2011-12-30 23:25:31 5
  • Forget remembered path locations of previously ran commands


    -5
    rehash
    Octave · 2010-06-18 15:29:17 6
  • Add a folder to PATH

    only during session


    -5
    export PATH=$PATH:/home/user/my_prog
    sentenza · 2014-11-04 20:50:19 7
  • View process statistics in realtime

    A simple but effective replacement for ps aux. I used to waste my time running ps over and over; top is the way to go. It also allows complex sorting options. Press q to exit "nicely" (Ctrl + C is always an option, of course). Note that the list updates each second, resorting in the process; if you're trying to grab a specific PID, you might be better off with ps. htop Alternatively, htop is available, though it may not come pre-installed. htop is slightly more interactive than top and includes color coding, visuals, and a nice interface for selecting and then killing processes. (Thanks to bwoodacre for this great tool.) Show Sample Output


    -5
    top
    Zenexer · 2009-03-18 00:03:42 10
  • Kill a process by application

    The pgrep retrieves the PID, then the KILL receive it, and kill it... It works also if the application has more than one instance.... Show Sample Output


    -5
    kill -9 `pgrep $PROCESS_NAME`
    juanse006 · 2010-06-18 20:43:24 9
  • Check your running Ubuntu version


    -5
    lsb_release -a
    ShaneEaston · 2012-03-27 15:47:29 60
  • Kill a daemon by name, not by PID

    Just find out the daemon with $ netstat -atulpe. Then type in his name and he gets the SIGTERM.


    -5
    kill_daemon() { echo "Daemon?"; read dm; kill -15 $(netstat -atulpe | grep $dm | cut -d '/' -f1 | awk '{print $9}') }; alias kd='kill_daemon
    P17 · 2009-05-26 20:39:56 7
  • Print a list of installed Perl modules

    IMVHO if you are using cpan to install perl modules you are doing it wrong. Show Sample Output


    -5
    dpkg-query -W | grep perl
    unixmonkey10924 · 2010-07-20 16:14:04 4
  • Post to twitter via curl, Windows version

    Aside from curl one will need iconv windows binary since windows lacks a native utf-8 cli interface. In my case I need a proxy in China and iconv to convert gbk status string into utf-8. GnuWin32 is a good choice with loads of coreutils natively ported to Windows "FOR /f" is the solution to pass iconv output to curl.


    -5
    FOR /f %%g in ('echo %1 ^| iconv -f gbk -t utf-8') DO curl -x proxy:port -u user:pass -d status=%%g -d source="cURL" http://twitter.com/statuses/update.xml
    MeaCulpa · 2010-07-21 04:53:54 3
  • sed -n "$LINE1,${LINE2}p;${LINEA2}q;" "$FILE"

    If you need to print some portion of a huge file, let's say you want to print from line 200 to 300, you can use this command to print the line from LINE1 to LINE2 of file FILE.


    -5
    Printing portion of a big file
    acirulli · 2009-03-30 11:08:38 6
  • Delete a file securely by overwriting its contents


    -5
    shred -v filename
    techie · 2013-05-07 14:58:17 6
  • Random Beeps on Your PC Speaker

    Sends random beeps to your PC-speaker. Think... You can also run it remotely on another computer using SSH and scare its user! Don't forget to run it on your dedicated hosting server and watch sysadmin's action from data-center's live remote cameras!


    -5
    dd if=/dev/urandom of=/dev/speaker bs=1
    khashmeshab · 2010-10-27 09:22:40 7
  • How many lines does the passwd file have?


    -5
    awk 'END {print NR}' /etc/passwd
    Leo_Gutierrez · 2011-06-23 00:33:40 3
  • Random Beeps on Your Audio Card's Output

    Sends random sounds to your sound card output (e.g. your speaker). Think... You can also run it remotely on another computer using SSH and scare its user!


    -5
    dd if=/dev/urandom of=/dev/dsp
    khashmeshab · 2010-10-27 09:25:02 3
  • doing some math...


    -5
    echo 1+1|bc
    gnawa · 2009-02-19 13:46:58 5
  • Whois on target and save results to file instantly

    This can be used in scripts, to find out the origin of target IP etc. Show Sample Output


    -5
    x=192.168.1.1; whois $x > $x.txt
    sxiii · 2011-01-17 03:33:49 9
  • Bash logger


    -5
    echo -en "$USER@$HOSTNAME:${PWD##*/}> ";while read x;do echo $x>>/tmp/log.txt;echo $x|$0 2>&1;echo -en "$USER@$HOSTNAME:${PWD##*/}> ";done
    Nikon · 2011-01-17 20:53:28 13
  • Kill process you don't know the PID of, when pidof and pgrep are not available.

    This will kill a specific process you don't know the PID of, when pidof and pgrep are not available, for example on OS X. var1 is created so that the whitespace can be trimmed before passing off to kill. Show Sample Output


    -5
    export var1=`ps -A | grep '[u]nique' | cut -d '?' -f 1`; echo${var1/ /}; kill -9 $var1
    headyadmin · 2010-03-22 21:06:58 5
  • Concatenate lines of to files, one by one


    -6
    join file1.txt file2.txt > file3.txt
    olafrv · 2009-03-01 05:12:07 5
  • Refined repository search

    replace apt-get with your distro's package manager. Where 'something' is the package name, and 'specific' is what you're specifically looking for. This helps if your query is 2+ words long. Show Sample Output


    -6
    apt-get search something | grep specific
    ProfOak · 2010-09-27 07:10:39 30
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find all non-html files

Show a prettified list of nearby wireless APs

Parse YouTube url (get youtube video id)
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.

Copy a file to a new directory created on the fly
You need to cp, mv, scp, ..., some files around from one place to another, and after having laboriously typed out the source path, you remember that the destination directory doesn't yet exist, and so the command will fail. So rather than killing the command line and starting over, just interpolate the results of creating the directory and echo its name. You could DRY this with a for; do; done, but that may be more trouble than it's worth.

Repeat a command until stopped
In this case it runs the command 'curl localhost:3000/site/sha' waiting the amount of time in sleep, ie: 1 second between runs, appending each run to the console. This works well for any command where the output is less than your line width This is unlike watch, because watch always clears the display.

static compilation

Batch-Convert text file containing youtube links to mp3

list files recursively by size

Draw a Sierpinski triangle
OK, not the most useful but a good way to impress friends. Requires the "display" command from ImageMagick.

Numeric zero padding file rename
This uses Perl's rename utility (you may have to call it as prename on your box) and won't choke on spaces or other characters in filenames. It will also zero pad a number even in filenames like "vacation-4.jpg".

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