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Check availability of Websites based on HTTP_CODE
This is sample output - yours may be different.
8

urls=('www.ubuntu.com' 'google.com'); for i in ${urls[@]}; do http_code=$(curl -I -s $i -w %{http_code}); echo $i status: ${http_code:9:3}; done

Code_Bleu · 2009-08-17 16:24:26 5
count the appearance of a word or a string in a given webpage

Can be used to help perform some SEO optimizations. Show Sample Output
This is sample output - yours may be different.
```
$ wget -q -O- http://en.wikipedia.org/wiki/Linux | grep -o 'torvalds' | wc -w
8
```
0

wget -q -O- PAGE_URL | grep -o 'WORD_OR_STRING' | wc -w

evalinux · 2009-08-17 13:08:46 4
Get table column names from an MySQL-database in comma-seperated form
This is sample output - yours may be different.
2

mysql -u<user> -p<password> -s -e 'DESCRIBE <table>' <database> | tail -n +1 | awk '{ printf($1",")}' | head -c -1

Cowboy · 2009-08-17 12:54:44 3
Merge ( directories [looking for improvement]

Using a GUI file managers you can merge directories (cut and paste). This command roughly does the same (it doesn't ask for confirmation (no problem for me) and it doesn't clean up the empty SRC directories (no problem, trivial). probably does the same: cp -l SRC TARGET; rm -rf SRC
This is sample output - yours may be different.
0

(cd SRC; find . -type d -exec mkdir TARGET/{} ";"; find . -type f -exec mv {} TARGET/{} ";")

karel1980 · 2009-08-17 12:35:48 11
omit grep
This is sample output - yours may be different.
-4

ps aux | grep [c]ommandname

alvinx · 2009-08-17 12:29:16 11
postgresql SQL to show count of ALL tables (relations) including relation-size

Postgresql specific SQL - to show count of ALL tables including relation-size (pg_relation_size = used space on filesystem) - might need a VACUUM ANALYZE before showing all counts correctly !
This is sample output - yours may be different.
1

SELECT relname, reltuples, pg_relation_size(relname) FROM pg_class r JOIN pg_namespace n ON (relnamespace = n.oid) WHERE relkind = 'r' AND n.nspname = 'public' ORDER BY relname;

alvinx · 2009-08-17 11:46:34 4
vim easter egg

inside vim try: :help 42 to get the meaning of life, the universe and everything !
This is sample output - yours may be different.
11

$ vim ... :help 42

alvinx · 2009-08-17 11:37:02 6
Resolve a list of domain names to IP addresses

Given a file of FQDN, this simple command resolves the IP addresses of those Useful for log files or anything else that outputs domain names. Show Sample Output
This is sample output - yours may be different.
```
75.10.158.189
75.10.246.46
75.10.206.45
75.10.237.138
```
1

awk < file.name '{ system("resolveip -s " $1) }'

alanwilliamson · 2009-08-17 08:09:39 11
Convert deb to rpm

converts between Red Hat rpm, Debian deb, Stampede slp, Slackware tgz, and Solaris pkg file formats ... It also supports LSB packages.
This is sample output - yours may be different.
4

alien -r -c file.deb

userevolution · 2009-08-17 05:53:15 7
download and install the software package in one step
This is sample output - yours may be different.
0

rpm -ivh 'http://www.website.com/path/to/desired_software_package.rpm'

userevolution · 2009-08-17 05:08:58 7
Equivelant of a Wildcard

This is exactly the same as a wildcard - good for times when wildcards are disabled and when you want have a wildcard of a directory that is not your current ({`ls /path/to/dir`}). Does not work on older versions of Bash though.
This is sample output - yours may be different.
0

`ls`

matthewbauer · 2009-08-17 03:56:05 7
Unarchive entire folder

This will unarchive the entire working directory. Good for torrents (I don't know why they put each file into a seperate archive).
This is sample output - yours may be different.
-2

for f in *;do case "$(echo $f|sed "s/.*\.$[a-z\.]*$/\1/g")" in zip)unzip -qqo $f&&rm $f;;tar.gz|tar.bz2)tar xf $f&&rm $f;;rar)unrar e -o+ -r -y $f&&rm $f;;7z)7z e -qqo $f;;esac;done

matthewbauer · 2009-08-17 03:50:50 9
diff will usually only take one file from STDIN. This is a method to take the result of two streams and compare with diff. The example I use to compare two iTunes libraries but it is generally applicable.

diff is designed to compare two files. You can also compare directories. In this form, bash uses 'process substitution' in place of a file as an input to diff. Each input to diff can be filtered as you choose. I use find and egrep to select the files to compare.
This is sample output - yours may be different.
3

diff <(cd /path-1; find . -type f -print | egrep -i '\.m4a$|\.mp3$') <(cd /path-2; find . f -print | egrep -i '\.m4a$|\.mp3$')

drewk · 2009-08-17 00:49:31 6
total text files in current dir
This is sample output - yours may be different.
4

file -i * | grep -c 'text/plain'

markszabo · 2009-08-16 22:29:35 3
total text files in current dir

get files without extensions, get ASCII and utf-8 as "text/plain" Show Sample Output
This is sample output - yours may be different.
```
12
```
0

file -i * | grep 'text/plain' | wc -l

voyeg3r · 2009-08-16 21:22:46 4
Find out when your billion-second anniversary is (was).

This is the same command as this one, but for OS X. http://www.commandlinefu.com/commands/view/3053/find-out-when-your-billion-second-anniversary-is-was. Show Sample Output
This is sample output - yours may be different.
```
Mo 25 M?r 2013 23:24:41 CET
```
1

date -j -v +1000000000S -f %m%d%Y mmddYYYY

Zettt · 2009-08-16 20:42:29 11
Find out when your billion-second anniversary is (was). (on OS X)

This is the same command as this one, but for OS X. http://www.commandlinefu.com/commands/view/3053/find-out-when-your-billion-second-anniversary-is-was. Show Sample Output
This is sample output - yours may be different.
```
Mo 25 M?r 2013 23:24:41 CET
```
1

date -j -v +1000000000S -f %m%d%Y mmddyyyy

Zettt · 2009-08-16 20:41:30 5
insert ip range using vim

fast method for insert ip range using vim Show Sample Output
This is sample output - yours may be different.
```
192.168.0.1
192.168.0.2
192.168.0.3
192.168.0.4
192.168.0.5
192.168.0.6
192.168.0.7
192.168.0.8
```
6

:for i in range(1,255) | .put='192.168.0.'.i | endfor

voyeg3r · 2009-08-16 18:48:11 4
Insert line number in vim

Use this command to insert line numbers in source files, .' ' control how spaces you insert after number. Show Sample Output
This is sample output - yours may be different.
```
1  "file: how insert number lines in vim
2  "site: http://vivaotux.blogspot.com
3  "  .'  ' --> number of spaces after number
```
0

:%s/^/\=line('.').' '

voyeg3r · 2009-08-16 17:48:03 9
Find out when your billion-second anniversary is (was).

Replace 12/31/1970 with your birth date.
This is sample output - yours may be different.
1

date -d12/31/1970+1000000000sec

clone · 2009-08-16 10:12:30 14
Compress blank lines in VIM

This command will squeeze all consequent blank lines (including those with only space and tab charactes) to one. It will also empty the resulting line (remove the "|s/.*//" part if you don't need that).
This is sample output - yours may be different.
3

:g/^\s*$/,/\S/-j|s/.*//

clone · 2009-08-16 10:01:15 7

Check which files are opened by Firefox then sort by largest size.

Check which files are opened by Firefox then sort by largest size (in MB). You can see all files opened by just replacing grep to "/". Useful if you'd like to debug and check which extensions or files are taking too much memory resources in Firefox. Show Sample Output

FFPID=$(pidof firefox-bin) && lsof -p $FFPID | awk '{ if($7>0) print ($7/1024/1024)" MB -- "$9; }' | grep ".mozilla" | sort -rn

josue · 2009-08-16 08:58:22 7

Edit Crontab

this lets you edit a crontab file (which may be used as a backup as well) and insert this into your crontab. this way is especially handy, when multiple users are working on one account (e.g. root)
This is sample output - yours may be different.
-6

vi ~/.crontab && crontab ~/.crontab

micha · 2009-08-16 08:09:15 9
Network Information
This is sample output - yours may be different.
-5

ntop

theIndianMaiden · 2009-08-16 05:24:31 4
System load information alongside process information in a similar style to top.
This is sample output - yours may be different.
-3

atop

theIndianMaiden · 2009-08-16 04:45:04 3
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check open ports without netstat or lsof

Start an X app remotely

Launch a gui app remotely. In this example smplayer is installed on the remote machine, and movie.avi is in the remote user's home dir. Note that stdout/stderr is still local, so you'll have feedback locally, add '&>/dev/null' to suppress. This is surprisingly not well known (compared to running an X app locally via ssh -X). (NB. if your distro requires ~/.Xauthority file present, then try -fX if you have problems) Resubmitted (and trimmed, thanks sitaram) due to ridiculous voting on previous submission. Fingers crossed, it gets a better rating this time.

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.

Add prefix onto filenames

Best to try first with -n flag, to preview

Create a video screencast of any x11 window, with audio

The script gets the dimensions and position of a window and calls ffmpeg to record audio and video of that window. It saves it to a file named output.mkv

Jump to a directory, execute a command and jump back to current dir

Prefix every line with a timestamp

Join lines

It's works only when you replace '\n' to ONE character.

Get your commandlinefu points (upvotes - downvotes)

This will calculate the your commandlinefu votes (upvotes - downvotes). Hopefully this will boost my commandlinefu points.

Run CPU benchmark from command line

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All commands (14,187)

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