Commands tagged fun (14)

  • When feeling down, this command helps

    sudo apt-get install sl man sl


    24
    sl
    Svish · 2009-04-19 15:24:03 25
  • synchronicity

    The British Government entering in the Gregorian era. Show Sample Output


    10
    cal 09 1752
    flux · 2009-04-22 00:13:19 38
  • let a cow tell you your fortune


    8
    fortune | cowsay
    CodSpirit · 2010-05-31 13:23:39 4
  • Have a smile

    Outputs utf-8 smileys Show Sample Output


    5
    printf "$(awk 'BEGIN{c=127;while(c++<191){printf("\xf0\x9f\x98\\%s",sprintf("%o",c));}}')"
    ichbins · 2022-04-06 12:10:37 438
  • display a smiling smiley if the command succeeded and a sad smiley if the command failed

    you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;) Show Sample Output


    4
    <commmand>; if [[ "$?" = 0 ]]; then echo ':)'; else echo ':('; fi
    potatoface · 2010-08-23 20:35:31 13
  • Safe Russian Roulette (only echo, don't delete files)

    Shows "Bang!" in a chance of 1 out of 6, like in the original game with the gun (spin every round). Otherwise, echoes "Click...". If feeling brave you can also do: [ $[ $RANDOM % 6 ] == 0 ] && echo 'Bang!' && a really killer command || echo 'Click...' Show Sample Output


    4
    [ $[ $RANDOM % 6 ] == 0 ] && echo 'Bang!' || echo 'Click...'
    paulera · 2016-03-23 11:09:56 30
  • Labyrinth pattern

    Generates labyrinth-like pattern on UTF-8 terminal in bash. For fun ;) Show Sample Output


    2
    while ( true ) ; do if [ $(expr $RANDOM % 2 ) -eq 0 ] ; then echo -ne "\xE2\x95\xB1" ; else echo -ne "\xE2\x95\xB2" ; fi ; done
    tobi · 2015-01-17 12:46:37 10
  • let a cow tell you your fortune


    1
    cowsay $(fortune)
    mandroid · 2010-05-31 12:47:06 3
  • skipping five lines, at top, then at bottom

    Strangely enough, there is no option --lines=[negative] with tail, like the head's one, so we have to use sed, which is very short and clear, you see. Strangely more enough, skipping lines at the bottom with sed is not short nor clear. From Sed one liner : # delete the last 10 lines of a file $ sed -e :a -e '$d;N;2,10ba' -e 'P;D' # method 1 $ sed -n -e :a -e '1,10!{P;N;D;};N;ba' # method 2 Show Sample Output


    0
    seq 1 12 | sed 1,5d ; seq 1 12 | head --lines=-5
    flux · 2009-08-01 00:41:52 8
  • let a cow tell you your fortune

    Let Tux bring the fortune cookie


    0
    fortune | cowsay -f tux
    Zaphod · 2010-06-01 09:04:01 3
  • Play Lisp Snake in Emacs


    0
    emacs -f snake
    steadystatic · 2015-11-03 23:34:57 40
  • Combo matrix

    This is longer than others on here. The reason for this is I have combined two different matrix commands so it would work on all computers. I logged onto my server through a computer and it worked fine. I logged into my server through a mac and it looked $4!t so I have made one that works through both. Show Sample Output


    -1
    echo -e "CHECK=SAMPLE" output --command_to_long
    techie · 2013-04-03 08:46:47 10
  • Firefly quotes


    -3
    yum install fortune-firefly; fortune
    madrasi · 2011-01-26 04:32:03 4
  • figlet


    -6
    figlet -f roman message
    ekinertac · 2013-04-23 02:25:39 12

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Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Schedule Nice Background Commands That Won't Die on Logout - Alternative to nohup and at
Check out the usage of 'trap', you may not have seen this one much. This command provides a way to schedule commands at certain times by running them after sleep finishes sleeping. In the example 'sleep 2h' sleeps for 2 hours. What is cool about this command is that it uses the 'trap' builtin bash command to remove the SIGHUP trap that normally exits all processes started by the shell upon logout. The 'trap 1' command then restores the normal SIGHUP behaviour. It also uses the 'nice -n 19' command which causes the sleep process to be run with minimal CPU. Further, it runs all the commands within the 2nd parentheses in the background. This is sweet cuz you can fire off as many of these as you want. Very helpful for shell scripts.

Get last sleep time on a Mac
Similarly for last wake time: $ sysctl -a | grep waketime

Open Remote Desktop (RDP) from command line having a custom screen size
This example uses xfreerdp, which builds upon the development of rdesktop. This example usage will also send you the remote machine's sound.

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.

Clone starred github repos in parallel with unlimited speed, this example will clone 25 repositories in parallel at same time.

faster version of ls *
I know its not much but is very useful in time consuming scripts (cron, rc.d, etc).

list block devices
Shows all block devices in a tree with descruptions of what they are.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Record a screencast and convert it to an mpeg
Grab X11 input and create an MPEG at 25 fps with the resolution 800x600

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