All commands

All commands (14,187)

sorted by

Get your external IP address
This is sample output - yours may be different.
-1

wget -O - http://checkip.dyndns.org|sed 's/[^0-9.]//g'

thundernode · 2009-08-06 12:47:32 5
Get your external IP address

Same thing as above, just uses fetch and ipchicken.com Show Sample Output
This is sample output - yours may be different.
```
1.2.3.4
```
-1

fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'

spackle · 2009-08-06 11:57:44 3
Conficker Detection with NMAP
This is sample output - yours may be different.
6

nmap -PN -d -p445 --script=smb-check-vulns --script-args=safe=1 IP-RANGES

themoux · 2009-08-06 11:54:33 6
Get your external IP address
This is sample output - yours may be different.
9

curl -s 'http://checkip.dyndns.org' | sed 's/.*Current IP Address: $[0-9\.]*$.*/\1/g'

kulor · 2009-08-06 11:54:31 10
Get your external IP address

The same as the other user, but smarter, using -d and -f
This is sample output - yours may be different.
-2

html2text http://checkip.dyndns.org | grep -i 'Current IP Address:'|cut -d' ' -f4

adonis28850 · 2009-08-06 11:30:32 3
Create more threads with less stack space

default stack size is 10M. This makes your multithread app filling rapidly your memory. on my PC I was able to create only 300thread with default stack size. Lower the default stack size to the one effectively used by your threads, let you create more. ex. putting 64k I was able to create more than 10.000threads. Obviously ...your thread shouldn't need more than 64k ram!!!
This is sample output - yours may be different.
1

ulimit -s 64

ioggstream · 2009-08-06 10:40:25 5
modify (mozldap) with proxy authentication and no other controls
This is sample output - yours may be different.
0

ldapmodify -Y "dn:uid=rob,dc=example.com" -g -R -J 2.16.840.1.113730.3.4.16 ...

ioggstream · 2009-08-06 10:33:05 3
Get your external IP address
This is sample output - yours may be different.
-1

html2text http://checkip.dyndns.org | grep -i 'Current IP Address:'|cut -c21-36

tkoopa · 2009-08-06 10:29:02 4
Tweet from Terminal to twitter !

Tweeting from terminal to twitter accounts..
This is sample output - yours may be different.
1

curl -u yourusername:yourpassword -d status=?Your Message Here? https://twitter.com/statuses/update.xml

terminalhacker · 2009-08-06 09:31:53 4
command to display info about the core specified

Display information about the cores. * sudo apt-get install schedtool Show Sample Output
This is sample output - yours may be different.
```
PID     1: PRIO   0, POLICY N: SCHED_NORMAL  , NICE   0, AFFINITY 0x1
```
-1

schedtool 1

terminalhacker · 2009-08-06 08:42:03 3
Convert a batch of images to a Video

Converts the batch of images to video. *mencoder* required.
This is sample output - yours may be different.
0

mencoder "mf://frame_*.bmp" -mf w=720:h=480:fps=30:type=bmp -ovc lavc -lavcopts vcodec=mpeg4 -o number_video.mp4

terminalhacker · 2009-08-06 06:59:49 3
Command to display how much resource is taken by cpu and which core is taking
This is sample output - yours may be different.
0

pidstat -C "ffmpeg" -u

terminalhacker · 2009-08-06 06:56:01 3
Play music from pure data

Plays the sound of the file, should sound like *some* kind of music, most files sound like static but some are really cool. variations: sudo cat /dev/sda > /dev/dsp sudo cat /dev/sda5 | aplay Check out http://bbs.archlinux.org/viewtopic.php?id=70937 for more variations! semi-dupe--like http://www.commandlinefu.com/commands/view/985/generate-white-noise but with different syntax and program. Show Sample Output
This is sample output - yours may be different.
```
Playing raw data 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
```
0

sudo cat /usr/share/icons/*/*/* > /dev/dsp

12345678 · 2009-08-06 03:12:27 4
sed : using colons as separators instead of forward slashes

Having to escape forwardslashes when using sed can be a pain. However, it's possible to instead of using / as the separator to use : . I found this by trying to substitute $PWD into my pattern, like so sed "s/~.*/$PWD/" file.txt Of course, $PWD will expand to a character string that begins with a / , which will make sed spit out an error such as "sed: -e expression #1, char 8: unknown option to `s'". So simply changing it to sed "s:~.*:$PWD:" file.txt did the trick. Show Sample Output
This is sample output - yours may be different.
```
$ cat dir_name.txt
/home/johnson/music

$ sed "s:/home/johnson/:/net/backup/:" dir_name.txt
/net/backup/music
```
8

sed "s:/old/direcory/:/new/directory/:" <file>

thebillywayne · 2009-08-06 00:37:45 6
grep (or anything else) many files with multiprocessor power

xargs -P N spawns up to N worker processes. -n 40 means each grep command gets up to 40 file names each on the command line.
This is sample output - yours may be different.
4

find . -type f -print0 | xargs -0 -P 4 -n 40 grep -i foobar

ketil · 2009-08-05 23:18:44 8
Send email with one or more binary attachments

This command uses mutt to send the mail. You must pipe in a body, otherwise mutt will prompt you for some stuff. If you don't have mutt, it should be dead easy to install.
This is sample output - yours may be different.
11

echo "Body goes here" | mutt -s "A subject" -a /path/to/file.tar.gz recipient@example.com

ketil · 2009-08-05 23:06:25 10
Use all the cores or CPUs when compiling

Force make command to create as many compile processes as specified (4 in the example), so that each one goes into one core or CPU and compilation happens in parallel. This reduces the time required to compile a program by up to a half in the case of CPUs with 2 cores, one fourth in the case of quad cores... and so on.
This is sample output - yours may be different.
16

make -j 4

kovan · 2009-08-05 22:50:57 12
Colorize make, gcc, and diff output

Colorize output of make, gcc/g++ or diff, making it easier to read at a glance. They are not distributed with make, diff or gcc, but are usually available in the repositories.
This is sample output - yours may be different.
3

colormake, colorgcc, colordiff

kovan · 2009-08-05 22:40:11 4
Lists unambigously names of all xml elements used in files in current directory

This one will work a little better, the regular expressions it is not 100% accurate for XML parsing but it will suffice any XML valid document for sure. Show Sample Output
This is sample output - yours may be different.
```
a
b
body
br
center
div
fieldset
font
form
func:function
func:result
h1
h2
h4
head
html
i
img
input
label
li
link
meta
noscript
option
p
sc
script
select
span
strong
style
table
tbody
td
textarea
th
title
tr
ul
xsl:apply-templates
xsl:attribute
xsl:call-template
xsl:choose
xsl:copy-of
xsl:for-each
xsl:if
xsl:include
xsl:otherwise
xsl:param
xsl:stylesheet
xsl:template
xsl:text
xsl:value-of
xsl:variable
xsl:when
xsl:with-param
```
0

grep -Eho '<[a-ZA-Z_][a-zA-Z0-9_-:]*' * | sort -u | cut -c2-

inkel · 2009-08-05 21:54:29 3
Salvage a borked terminal

This is more or less the same as 'reset', but with two advantages: the initial LF character makes sure you're starting a new line to the tty driver, the final one is more reliably a line-end as CR is often unset; and second, 'stty sane' is reliable on older UNIX systems, especially Berkeley-based ones.
This is sample output - yours may be different.
13

<ctrl+j>stty sane<ctrl+j>

CharlieInCO · 2009-08-05 21:50:07 37
Salvage a borked terminal

This works in some situations where 'reset' and the other alternatives don't.
This is sample output - yours may be different.
11

echo <ctrl-v><esc>c<enter>

kcm · 2009-08-05 18:32:28 9
Sort your music

This will mv all your mp3 files in the current directory to $ARTIST/$ALBUM/$NAME.mp3 Make sure not to use sudo - as some weird things can happen if the mp3 file doesn't have id3 tags.
This is sample output - yours may be different.
5

for file in *.mp3;do mkdir -p "$(mp3info -p "%a/%l" "$file")" && ln -s "$file" "$(mp3info -p "%a/%l/%t.mp3" "$file")";done

matthewbauer · 2009-08-05 17:04:34 8
Find out your Debian version

Easy way to find out what Debian version your machine is running Show Sample Output
This is sample output - yours may be different.
```
5.0.2
```
-4

cat /etc/debian_version

caiosba · 2009-08-05 14:47:05 5
Rezip a bunch of files

I used this because I needed to sort the content of a bunch of gzipped log files. Replace sort with something else, or simply remove sort to just rezip everything
This is sample output - yours may be different.
-2

find . -name "*.gz" | xargs -n 1 -I {} bash -c "gunzip -c {} | sort | gzip -c --best > {}.new ; rm {} ; mv {}.new {}"

kennethjor · 2009-08-05 14:16:15 7
find and delete empty directories recursively

this will show the names of the deleted directories, and will delete directories that only no files, only empty directories.
This is sample output - yours may be different.
6

find . -depth -type d -empty -exec rmdir -v {} +

grokskookum · 2009-08-05 13:48:13 8
‹ First < 468 469 470 471 472 > Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Watch Al Jazeera Livestream directly in mplayer #jan25

One cannot call the high quality livestream directly, but command this gives you a session ID and the high quality stream. #egypt #jan25

Compress files in a directory

Show the key code for keyboard events include the Fn keys

The keycodes are a result of pressing: Mute (Fn+F1) a

View a file with less, starting at the end of the file

The same as typing 'less filename' then 'G' or '>' or the END key. Comes in handy with shell scripts or aliases: alias weblog='less +G /var/log/httpd/access_log' alias errlog='less +G /var/log/httpd/error_log'

Check RAM size

modify a file in place with perl

changes THIS to THAT in all files matching fileglob* without using secondary files

Print all lines between two line numbers

This command uses awk(1) to print all lines between two known line numbers in a file. Useful for seeing output in a log file, where the line numbers are known. The above command will print all lines between, and including, lines 3 and 6.

list files recursively by size

distribution specific information

Reverse SSH

this command from the source server and this follow in the destination server: ssh user@localhost -p 8888

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)

All commands (14,187) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

All commands (14,187)

sorted by