All commands (14,187)

  • Move files around local filesystem with tar without wasting space using an intermediate tarball.


    -4
    tar -C <source_dir> -cf . | tar -C <dest_dir> -xf
    Tekhne · 2009-07-08 22:19:04 6
  • Emptying a text file in one shot in VIM


    -4
    :!>test.txt
    amaymon · 2009-08-19 13:45:23 4
  • Returns the absolute path to a command, using which if needed

    It will return the absolute location of the called a script. If is in $PATH, it will search it using which. You can combine this function with this other one: http://www.commandlinefu.com/commands/view/9252/readlink-equivalent-using-shell-commands-and-following-all-links, to get a way to know where is the real location of a called script: # Returns the realpath of a called command. whereis_realpath() { local SCRIPT_PATH=$(whereis $1); myreadlink ${SCRIPT_PATH} | sed "s|^\([^/].*\)\$|$(dirname ${SCRIPT_PATH})/\1|"; } Show Sample Output


    -4
    get_absolute_path() { echo $1 | sed "s|^\([^/].*/.*\)|$(pwd)/\1|;s|^\([^/]*\)$|$(which -- $1)|;s|^$|$1|"; }
    keymon · 2011-09-13 11:06:55 6
  • show ip


    -4
    ip a
    huazhihao · 2012-09-20 01:44:58 5
  • Creating a pseudo-random password


    -4
    perl -e 'print crypt("PASSWORD",int(rand(128))).$/;'
    cicatriz · 2010-09-30 12:58:39 3
  • count occurences of each word in novel David Copperfield

    This command might not be useful for most of us, I just wanted to share it to show power of command line. Download simple text version of novel David Copperfield from Poject Gutenberg and then generate a single column of words after which occurences of each word is counted by sort | uniq -c combination. This command removes numbers and single characters from count. I'm sure you can write a shorter version. Show Sample Output


    -4
    wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed '1,419d' | tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk 'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}'
    alperyilmaz · 2009-05-04 16:00:39 11
  • extract a certain number of lines from a file and dump them to another file

    It extracts X number of lines from file1 and dumps them to file2.Using grep with the empty string '' extracts the complete lines (i.e. no filtering takes place) and the -m flag indicates how many lines to extract out from the given file. Then using the redirect > operator we send the extracted lines to a new file.


    -4
    grep '' -m X file1 > file2
    sardanapalos · 2009-03-22 04:34:43 17
  • See smbstatus all the time

    See smbstatus Output within a 5 second interval (for monitoring smb access)


    -4
    while (( $i != 0 )) { smbstatus; sleep 5; clear }
    unixmonkey4084 · 2009-06-03 13:26:30 9
  • !$ - The last argument to the previous command

    After a command is run in bash, !$ is set to the last (space-delimited) argument of the command. Great for running several commands against the same file in a row.


    -4
    svn status app/models/foo.rb; svn commit -m "Changed file" !$
    ggoodale · 2009-03-22 23:14:06 5
  • Display default values on Foundry (Brocade) RX and MLX BigIron L3 (routers & switches)

    Show Sample Output


    -4
    sh default values
    rootgeek · 2010-03-26 02:36:57 4
  • kill all pids from $PID

    # define user pid to kill PID=httpd ; # kill all pids ps aux | grep $PID | grep -v grep | awk '{print $2}' | xargs kill -9 Show Sample Output


    -4
    PID=httpd ; ps aux | grep $PID | grep -v grep | awk '{print $2}' | xargs kill -9
    esaenz · 2012-02-21 23:27:47 6
  • Twitter Account Validator

    I use these command to validate twitter accounts, we can use a "for a in $(cat list.txt)" to validate a complete list of twitter accounts.


    -4
    if lynx --dump http://twitter.com/xmuda | grep -q "Sorry, that page does"; then echo "Dont Exist"; else echo "Exist"; fi
    xmuda · 2013-03-23 16:12:24 4
  • Dispaly a bunch of Info. on Foundry (Brocade) RX and MLX BigIron L3 (routers & switches)

    The sample output, is the command with a ?, to show you all the stuff you can look at. Show Sample Output


    -4
    dm ?
    rootgeek · 2010-03-26 02:42:21 3
  • Place a filename at the beginning of the line to make it easier to edit the search at the end of the command. Place a filename at the beginning of the line to make it easier to edit the search at the end of the command.

    Show Sample Output


    -4
    Place a filename at the beginning of the line to make it easier to edit the search at the end of the command.
    iveney · 2009-02-07 12:03:19 12
  • let w3m usecookie


    -4
    alias w3m='w3m -cookie'
    freestyler · 2009-07-09 09:01:55 4
  • forcing Windows to do the scandisk during boot

    This command marks it as "dirty" NTFS partition, forcing Windows to do the scandisk during boot. It is convenient if you work hard to NTFS partitions under Linux


    -4
    ntfsfix /dev/hda1
    0disse0 · 2011-07-02 17:49:48 3
  • change your PS1 to look better :)

    changes the PS1 to something better than default. [username.hostname.last-2-digits-of-ip] (current directory) Show Sample Output


    -4
    newhostname=$(hostname | awk -F. '{print $1 "." $2}'); ipaddress=$(nslookup `hostname` | grep -i address | awk -F" " '{print $2}' | awk -F. '{print $3 "." $4}' | grep -v 64.142);PS1="[`id -un`.$newhostname.$ipaddress]"' (${PWD}): '; export PS1
    simardd · 2009-02-16 20:11:53 8
  • Copy a file over SSH without SCP

    I have come across multiple situations where I could only get to a server from a very restrictive bounce point which would not allow file transfers. I was able to uuencode a file, copy the output to a text file over putty, and then uudecode the file to transfer it. This works with any kind of file. Show Sample Output


    -4
    uuencode -m <filename> <filename>
    leprasmurf · 2009-12-22 15:28:59 3
  • Find the files that include a TODO statement within a project


    -4
    grep --exclude-dir=.svn --exclude=*~ -i "TODO" -rl .
    saibbot · 2011-04-06 20:25:41 5
  • delete first X lines of a file

    deletes first 55 lines; change the 55 to whatever number


    -4
    sed '1,55d'
    grep · 2009-02-16 20:36:25 8
  • Ping 10 times then quit

    On Linux and Mac systems (I have not tested with other Unix systems), the ping command will keep on pinging until the user interrupts it with Ctrl+C. On Windows system, ping will execute for a number of times then quit. The -c flag on Linux and Mac will make this happen


    -4
    ping -c 10 hostname
    haivu · 2009-03-04 06:14:52 6
  • convert vdi to vmdk (virtualbox v3.2 hard disk conversion to vmware hard disk format)

    This is based on the Windows Version of VirtualBox. From the /? ... VBoxManage clonehd | [--format VDI|VMDK|VHD|RAW|] [--variant Standard,Fixed,Split2G,Stream,ESX] [--type normal|writethrough|immutable|shareable] [--remember] [--existing] From the online help.. http://www.virtualbox.org/manual/ch08.html#id2676537 VBoxManage clonehd This command duplicates a registered virtual hard disk image to a new image file with a new unique identifier (UUID). The new image can be transferred to another host system or imported into VirtualBox again using the Virtual Media Manager; see the section called ?The Virtual Media Manager? and the section called ?Cloning disk images?. The syntax is as follows: VBoxManage clonehd | [--format VDI|VMDK|VHD|RAW|] [--variant Standard,Fixed,Split2G,Stream,ESX] [--type normal|writethrough|immutable] [--remember] where the parameters mean: format Allow to choose a file format for the output file different from the file format of the input file. variant Allow to choose a file format variant for the output file. It is a comma-separated list of variant flags. Not all combinations are supported, and specifying inconsistent flags will result in an error message. type Only honored if --remember is also specified. Defines what kind of hard disk type this image should be. remember Keep the destination image registered after it was successfully written. Show Sample Output


    -4
    vboxmanage clonehd --format VMDK <source image|uuid> <destination image>
    dreffed · 2010-10-04 16:42:12 3
  • Remove all pyc files


    -4
    find . -name \*.pyc -delete
    zluyuer · 2016-09-07 01:49:59 17
  • Find out your Debian version

    Easy way to find out what Debian version your machine is running Show Sample Output


    -4
    cat /etc/debian_version
    caiosba · 2009-08-05 14:47:05 5
  • netstat with group by (ip adress)

    netstat has two lines of headers: Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State Added a filter in the awk command to remove them


    -4
    netstat -ntu | awk ' $5 ~ /^[0-9]/ {print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
    letterj · 2011-07-04 20:23:21 8
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kde4 lock screen command
If you wish to launch the kde4 screen saver without the password prompt to exit, use this command: $ qdbus org.freedesktop.ScreenSaver /ScreenSaver org.freedesktop.ScreenSaver.SetActive True Also can be done with: $ /usr/lib/kde4/libexec/kscreenlocker --forcelock

Check if the Debian package was used since its installation/upgrade.
This script compares the modification date of /var/lib/dpkg/info/${package}.list and all the files mentioned there. It could be wrong on noatime partitions. Here is non-oneliner: #!/bin/sh package=$1; list=/var/lib/dpkg/info/${package}.list; inst=$(stat "$list" -c %X); cat $list | ( while read file; do if [ -f "$file" ]; then acc=$(stat "$file" -c %X); if [ $inst -lt $acc ]; then echo used $file exit 0 fi; fi; done exit 1 )

Create md5sum of files under the current dir excluding some directories
Useful if you want get all the md5sum of files but you want exclude some directories. If your list of files is short you can make in one command as follow: $ find . -type d \( -name DIR1 -o -name DIR2 \) -prune -o -type f -exec md5sum {} \; Alternatively you can specify a different command to be executed on the resulting files.

silent/shh - shorthand to make commands really quiet
Sometimes I just want to run a command quietly but all that keyboard shifting makes my fingers hurt. This little function does the job eg.: $ if shh type less; then PAGER=less; fi

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"

Invert selection with find.

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"

find out how many days since given date
You can also do this for seconds, minutes, hours, etc... Can't use dates before the epoch, though.

Get your outgoing IP address
Instead of opening your browser, googling "whatismyip"... Also useful for scripts. dig can be found in the dnsutils package.

Print one . instead of each line
If you're running a command with a lot of output, this serves as a simple progress indicator. This avoids the need to use `/dev/null` for silencing. It works for any command that outputs lines, updates live (`fflush` avoids buffering), and is simple to understand.

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