All commands (14,187)

  • Edit a file on a remote host using vim


    55
    vim scp://username@host//path/to/somefile
    adminzim · 2009-02-18 15:09:53 18
  • git remove files which have been deleted

    It deletes all removed files, updates what was modified, and adds new files.


    54
    git add -u
    donnoman · 2009-09-16 00:13:14 23
  • Generate a random password 30 characters long

    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


    54
    strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 30 | tr -d '\n'; echo
    jbcurtis · 2009-02-16 00:39:28 27
  • Graph # of connections for each hosts.

    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


    53
    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 24
  • Job Control

    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


    53
    ^Z $bg $disown
    fall0ut · 2009-03-17 21:52:52 27
  • Show apps that use internet connection at the moment. (Multi-Language)

    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\"


    52
    ss -p
    Escher · 2009-09-19 21:55:01 14
  • Record a screencast and convert it to an mpeg

    Grab X11 input and create an MPEG at 25 fps with the resolution 800x600


    51
    ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg
    dcabanis · 2009-06-05 21:11:17 16
  • Monitor progress of a command

    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: http://www.catonmat.net/blog/unix-utilities-pipe-viewer/ Show Sample Output


    51
    pv access.log | gzip > access.log.gz
    p3k · 2009-02-06 08:50:40 222
  • Get the 10 biggest files/folders for the current direcotry


    51
    du -s * | sort -n | tail
    bambambazooka · 2009-02-05 11:18:43 33
  • Show numerical values for each of the 256 colors in bash

    Same as http://www.commandlinefu.com/commands/view/5876, 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.


    49
    for code in {0..255}; do echo -e "\e[38;05;${code}m $code: Test"; done
    scribe · 2010-06-19 02:14:42 14
  • Recursively remove all empty directories


    49
    find . -type d -empty -delete
    jmcantrell · 2010-03-23 15:21:33 20
  • Search for a <pattern> string inside all files in the current directory

    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.


    49
    grep -RnisI <pattern> *
    birnam · 2009-09-22 15:09:43 31
  • Convert seconds to human-readable format

    This example, for example, produces the output, "Fri Feb 13 15:26:30 EST 2009"


    49
    date -d@1234567890
    kFiddle · 2009-04-11 22:26:41 21
  • Monitor the queries being run by MySQL

    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: http://codeinthehole.com/archives/2-Monitoring-MySQL-processes.html


    49
    watch -n 1 mysqladmin --user=<user> --password=<password> processlist
    root · 2009-02-16 11:21:16 133
  • Nice weather forecast on your shell

    Change Seville for your prefered city. Show Sample Output


    48
    curl wttr.in/seville
    nordri · 2016-08-28 09:43:38 33
  • Search commandlinefu.com from the command line using the API

    Usage: cmdfu hello world Show Sample Output


    48
    cmdfu(){ curl "http://www.commandlinefu.com/commands/matching/$@/$(echo -n $@ | openssl base64)/plaintext"; }
    knoopx · 2009-08-19 02:18:24 73
  • Display a cool clock on your terminal

    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


    48
    watch -t -n1 "date +%T|figlet"
    dennisw · 2009-06-21 01:02:37 39
  • Processor / memory bandwidthd? in GB/s

    Read 32GB zero's and throw them away. How fast is your system? Show Sample Output


    48
    dd if=/dev/zero of=/dev/null bs=1M count=32768
    jacquesloonen · 2009-02-16 12:22:18 186
  • Create a quick back-up copy of a file

    Uses shell expansion to create a back-up called file.txt.bak


    48
    cp file.txt{,.bak}
    root · 2009-01-26 12:11:29 95
  • pretend to be busy in office to enjoy a cup of coffee

    just make some data scrolling off the terminal. wow.


    47
    cat /dev/urandom | hexdump -C | grep "ca fe"
    BOYPT · 2010-09-27 08:20:44 22
  • Remove security limitations from PDF documents using ghostscript

    Remove security from PDF document using this very simple command on Linux and OSX. You need ghostscript for this baby to work.


    47
    gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -c .setpdfwrite -f INPUT.pdf
    deijmaster · 2009-12-14 21:30:22 27
  • Check your unread Gmail from the command line

    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 "https://mail.google.com/mail/feed/atom" | 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 "https://mail.google.com/mail/feed/atom" | 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


    47
    curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | 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 46
  • Makes the permissions of file2 the same as file1

    Also works with: chgrp --reference file1 file2 chown --reference file1 file2


    46
    chmod --reference file1 file2
    rpavlick · 2010-03-31 12:05:48 13
  • Send pop-up notifications on Gnome

    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"


    46
    notify-send ["<title>"] "<body>"
    o6291408 · 2009-04-29 10:05:20 21
  • Create a persistent connection to a machine

    Create a persistent SSH connection to the host in the background. Combine this with settings in your ~/.ssh/config: Host host ControlPath ~/.ssh/master-%r@%h:%p ControlMaster no All the SSH connections to the machine will then go through the persisten SSH socket. This is very useful if you are using SSH to synchronize files (using rsync/sftp/cvs/svn) on a regular basis because it won't create a new socket each time to open an ssh connection.


    46
    ssh -MNf <user>@<host>
    raphink · 2009-02-26 14:11:19 21
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show the working directories of running processes
this shows the CWD of every running `java' command. YMMV but we often switch to a working directory for each service to start and run from there -- therefore this quicly shows what is running by a more meaningful name than command alone (the -bw prevents using blocking system calls which speeds this up quite a bit in the presence of remote mounted filesystems)

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" }

Copy file to a Windows/Samba share without mounting it
This commando copies the file (which must reside in the current directory) to //<server>/<share-name>/<subdirectory>/<file> through the CIFS protocol (Samba share or Windows Share). It doesn't require you to mount the filesystem first. --directory "<subdirectory>" may be omitted in order to copy the file the the root of the share. The "%password" part may also be omitted. If doing so, smbclient will ask for the password interactively. To copy a file from a Windows/Samba share, change "put" for "get". $ smbclient --user=user%password --directory "<subdirectory>" --command "get <file>" //<server>/<share-name>

last.fm rss parser
you can just use one awk script to parse the rss feed. No need to pipe so many awk's and sed's. Its ugly and inefficient.

CLFUContest : Check which process consume more than 10% of the cpu (configurable)

Replace spaces in filenames with underscores

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

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"

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

Get current Xorg resolution via xrandr
Not sure if it works the same on any shell.

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