All commands (14,161)

  • 56
    rm -f !(survivior.txt)
    RanyAlbeg · 2010-09-26 04:50:55 17

  • 55
    vim scp://username@host//path/to/somefile
    adminzim · 2009-02-18 15:09:53 8
  • It deletes all removed files, updates what was modified, and adds new files.

    git add -u
    donnoman · 2009-09-16 00:13:14 14
  • Find random strings within /dev/urandom. Using grep filter to just Alphanumeric characters, and then print the first 30 and remove all the line feeds. Show Sample Output

    strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 30 | tr -d '\n'; echo
    jbcurtis · 2009-02-16 00:39:28 20
  • Written for linux, the real example is how to produce ascii text graphs based on a numeric value (anything where uniq -c is useful is a good candidate). Show Sample Output

    netstat -an | grep ESTABLISHED | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c | awk '{ printf("%s\t%s\t",$2,$1) ; for (i = 0; i < $1; i++) {printf("*")}; print "" }'
    knassery · 2009-04-27 22:02:19 16
  • You're running a script, command, whatever.. You don't expect it to take long, now 5pm has rolled around and you're ready to go home... Wait, it's still running... You forgot to nohup it before running it... Suspend it, send it to the background, then disown it... The ouput wont go anywhere, but at least the command will still run... Show Sample Output

    ^Z $bg $disown
    fall0ut · 2009-03-17 21:52:52 19
  • for one line per process: ss -p | cat for established sockets only: ss -p | grep STA for just process names: ss -p | cut -f2 -sd\" or ss -p | grep STA | cut -f2 -d\"

    ss -p
    Escher · 2009-09-19 21:55:01 6
  • Grab X11 input and create an MPEG at 25 fps with the resolution 800x600

    ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg
    dcabanis · 2009-06-05 21:11:17 7
  • Pipe viewer is a terminal-based tool for monitoring the progress of data through a pipeline. It can be inserted into any normal pipeline between two processes to give a visual indication of how quickly data is passing through, how long it has taken, how near to completion it is, and an estimate of how long it will be until completion. Source: Show Sample Output

    pv access.log | gzip > access.log.gz
    p3k · 2009-02-06 08:50:40 14

  • 50
    du -s * | sort -n | tail
    bambambazooka · 2009-02-05 11:18:43 25
  • Same as, but for bash. This will show a numerical value for each of the 256 colors in bash. Everything in the command is a bash builtin, so it should run on any platform where bash is installed. Prints one color per line. If someone is interested in formatting the output, paste the alternative.

    for code in {0..255}; do echo -e "\e[38;05;${code}m $code: Test"; done
    scribe · 2010-06-19 02:14:42 9

  • 49
    find . -type d -empty -delete
    jmcantrell · 2010-03-23 15:21:33 10
  • This is how I typically grep. -R recurse into subdirectories, -n show line numbers of matches, -i ignore case, -s suppress "doesn't exist" and "can't read" messages, -I ignore binary files (technically, process them as having no matches, important for showing inverted results with -v) I have grep aliased to "grep --color=auto" as well, but that's a matter of formatting not function.

    grep -RnisI <pattern> *
    birnam · 2009-09-22 15:09:43 21
  • This example, for example, produces the output, "Fri Feb 13 15:26:30 EST 2009"

    date -d@1234567890
    kFiddle · 2009-04-11 22:26:41 13
  • Watch is a very useful command for periodically running another command - in this using mysqladmin to display the processlist. This is useful for monitoring which queries are causing your server to clog up. More info here:

    watch -n 1 mysqladmin --user=<user> --password=<password> processlist
    root · 2009-02-16 11:21:16 91
  • Change Seville for your prefered city. Show Sample Output

    nordri · 2016-08-28 09:43:38 24
  • Usage: cmdfu hello world Show Sample Output

    cmdfu(){ curl "$@/$(echo -n $@ | openssl base64)/plaintext"; }
    knoopx · 2009-08-19 02:18:24 63
  • This command displays a clock on your terminal which updates the time every second. Press Ctrl-C to exit. A couple of variants: A little bit bigger text: watch -t -n1 "date +%T|figlet -f big" You can try other figlet fonts, too. Big sideways characters: watch -n 1 -t '/usr/games/banner -w 30 $(date +%M:%S)' This requires a particular version of banner and a 40-line terminal or you can adjust the width ("30" here). Show Sample Output

    watch -t -n1 "date +%T|figlet"
    dennisw · 2009-06-21 01:02:37 22
  • Read 32GB zero's and throw them away. How fast is your system? Show Sample Output

    dd if=/dev/zero of=/dev/null bs=1M count=32768
    jacquesloonen · 2009-02-16 12:22:18 114
  • just make some data scrolling off the terminal. wow.

    cat /dev/urandom | hexdump -C | grep "ca fe"
    BOYPT · 2010-09-27 08:20:44 18
  • Remove security from PDF document using this very simple command on Linux and OSX. You need ghostscript for this baby to work.

    gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -c .setpdfwrite -f INPUT.pdf
    deijmaster · 2009-12-14 21:30:22 20
  • Checks the Gmail ATOM feed for your account, parses it and outputs a list of unread messages. For some reason sed gets stuck on OS X, so here's a Perl version for the Mac: curl -u username:password --silent "" | tr -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | perl -pe 's/^<title>(.*)<\/title>.*<name>(.*)<\/name>.*$/$2 - $1/' If you want to see the name of the last person, who added a message to the conversation, change the greediness of the operators like this: curl -u username:password --silent "" | tr -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | perl -pe 's/^<title>(.*)<\/title>.*?<name>(.*?)<\/name>.*$/$2 - $1/' Show Sample Output

    curl -u username:password --silent "" | tr -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<title>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"
    postrational · 2009-09-07 21:56:40 35
  • Uses shell expansion to create a back-up called file.txt.bak

    cp file.txt{,.bak}
    root · 2009-01-26 12:11:29 73
  • Also works with: chgrp --reference file1 file2 chown --reference file1 file2

    chmod --reference file1 file2
    rpavlick · 2010-03-31 12:05:48 7
  • The title is optional. Options: -t: expire time in milliseconds. -u: urgency (low, normal, critical). -i: icon path. On Debian-based systems you may need to install the 'libnotify-bin' package. Useful to advise when a wget download or a simulation ends. Example: wget URL ; notify-send "Done"

    notify-send ["<title>"] "<body>"
    o6291408 · 2009-04-29 10:05:20 13
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Selecting a random file/folder of a folder
I used only shuf command.

Get IPv4 of eth0 for use with scripts
I've been using it in a script to build from scratch proxy servers.

Edit 2 or more files in vim using vim -d
Is this not the same

ls not pattern
Hides some entries from listing.

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" }

See all the commits for which searchstring appear in the git diff

Dump an aspell dictionary as a word list

Sort files by size

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"

Grep all non-ascii character in file
It will highlight non-ascii character in a file. those character can cause problem for some application parsing ascii file.

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