All commands

All commands (14,187)

sorted by

Find and copy scattered mp3 files into one directory

I used this command to recursively gather all mp3 files that were previously imported into their own directories (sorted by band name) in Songbird.
This is sample output - yours may be different.
1

find . -name '*.mp3' -type f -exec sh -c 'exec cp -f "$@" /home/user/dir' find-copy {} +

mariusz · 2009-12-08 19:31:16 4
prints line numbers

Show Sample Output
This is sample output - yours may be different.
```
same thing
```
28

nl

solarislackware · 2009-12-08 19:30:32 16
Quickly batch resize images

-geometry (preserves values of height and width given, and aspect ratio). WARNING: While 'resize' creates resized copies of original files, 'mogrify' works on the original files, replacing them. It will overwrite the source files, use with caution, and backup regularly.
This is sample output - yours may be different.
2

mogrify -geometry 800x600 *.jpg

mariusz · 2009-12-08 19:23:19 3
prints line numbers
This is sample output - yours may be different.
5

cat -n

putnamhill · 2009-12-08 16:35:55 16
prints line numbers

No need $_ netp ;)
This is sample output - yours may be different.
0

perl -pe 'print "$. "' <file>

sputnick · 2009-12-08 16:11:51 10
Generate a binary file with all ones (0xff) in it

This is similar to how you would generate a file with all zeros dd if=/dev/zero of=allzeros bs=1024 count=2k
This is sample output - yours may be different.
4

tr '\000' '\377' < /dev/zero | dd of=allones bs=1024 count=2k

azeey · 2009-12-08 16:05:28 4
prints line numbers
This is sample output - yours may be different.
-1

grep -n . datafile ;

glaudiston · 2009-12-08 15:41:22 3
prints line numbers

This command prints all lines of a file together with is line number. Show Sample Output
This is sample output - yours may be different.
```
1 - #include <vector>
2 - #include <iostream>
3 - #include <sstream>
4 - #include <algorithm>
5 - 
6 - class Ponto{
```
-1

perl -ne 'print "$. - $_"' infile.txt

netp · 2009-12-08 15:27:39 3
Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)

Bulk downloads the comic strip JPG files for the adult cartoon Savitabhabhi, storing each set in it's own folder. Requires manual removal of "non-image" files that maybe created because each series may differ in length. The command can be easily adapted for UNIX flavours. You need to have cURL in your path.
This is sample output - yours may be different.
-1

for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg

MyTechieself · 2009-12-08 15:01:16 8
Update twitter via curl (and also set the "from" bit)

An improvement of the original (at: http://www.commandlinefu.com/commands/view/2872/update-twitter-via-curl) in the sense that you see a "from cURL" under your status message instead of just a "from API" ;-) Twitter automatically links it to the cURL home page. Show Sample Output
This is sample output - yours may be different.
```
Enter host password for user 'twitter-username':
```
14

curl -u twitter-username -d status="Hello World, Twitter!" -d source="cURL" http://twitter.com/statuses/update.xml

MyTechieself · 2009-12-08 14:54:33 8
Monitoring sessions that arrive at your server
This is sample output - yours may be different.
1

watch -n 1 -d "finger"

tsiqueira · 2009-12-08 14:53:18 3
Download streaming video in mms

require mimms package
This is sample output - yours may be different.
1

mimms mms://Your_url.wmv

eastwind · 2009-12-08 14:45:12 4
Know when you will type :q in your term instead of vi(m), the alias will chewed you out.

For vi(m) users : Add it in your ~/.bashrc Add an "exit" @ the end if you are masochist ;) Show Sample Output
This is sample output - yours may be different.
```
this is NOT vi(m) :/
```
-1

alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'

sputnick · 2009-12-08 12:59:44 3
Normalize volume in your mp3 library

Execute this in the root of your music library and this recurses through the directories and normalizes each folder containing mp3s as a batch. This assumes those folders hold an album each. The command "normalize-audio" may go by "normalize" on some systems.
This is sample output - yours may be different.
-2

find . -type d -exec sh -c "normalize-audio -b \"{}\"/*.mp3" \;

Mikelifeguard · 2009-12-08 03:13:13 7
determine if tcp port is open

@putnamhill, no need if statement in that case. && is a AND and || is a OR
This is sample output - yours may be different.
6

nc -zw2 www.example.com 80 && echo open

sputnick · 2009-12-07 21:35:25 11
determine if tcp port is open

Requires netcat.
This is sample output - yours may be different.
2

if (nc -zw2 www.example.com 80); then echo open; fi

putnamhill · 2009-12-07 20:04:55 3
Salvage a borked terminal

Also works in places where reset does not.
This is sample output - yours may be different.
1

echo <ctrl+v><ctrl+o><enter>

mkobler · 2009-12-07 20:02:33 7
Search trought pidgin's conversation logs for "searchterm", and output the result.

will search trought pidgin conversation logs for "searchterm", and output them stripping the html tags. The "sed" command is optionnal if your logs are stored in plain text format.
This is sample output - yours may be different.
2

grep -Ri searchterm ~/.purple/logs/* | sed -e 's/<.*?>//g'

Nostoc · 2009-12-07 19:38:18 6
Show the meta information on a package (dependency , statuts ..) on debian derivative distro
This is sample output - yours may be different.
-4

aptitude show packages_name

metalx1000 · 2009-12-07 19:27:33 3
Shorten url with is.gd using curl, perl

// This is description for the old command: Unfortunately we to encode the URL. It can't be done with bash (without building it ourselves) so I used Perl? Example with Perl: curl -s http://is.gd/api.php?longurl=`perl -MURI::Escape -e "print uri_escape('http://www.google.com/search?hl=en&source=hp&q=commandlinefu&aq=0&oq=commandline');"` Example without Perl: curl http://is.gd/api.php?longurl=http://www.google.com Most urls doesn't use & and ? anymore (SEO etc) so in most cases you can just use the simple version. :) Show Sample Output
This is sample output - yours may be different.
```
http://is.gd/5faqp
```
0

curl -s "http://is.gd/api.php?longurl=[long_url]"

Josso · 2009-12-07 18:52:04 8
Ruby - nslookup against a list of IP`s or FQDN`s

This version uses host and no ruby.
This is sample output - yours may be different.
1

while read n; do host $n; done < list

putnamhill · 2009-12-07 18:03:20 4
Ruby - nslookup against a list of IP`s or FQDN`s
This is sample output - yours may be different.
-2

ruby -e 'File.foreach("list") {|i| print `nslookup #{i}`}'

alienone · 2009-12-07 17:29:59 3
Move all files untracked by git into a directory
This is sample output - yours may be different.
0

git clean -n | sed 's/Would remove //; /Would not remove/d;' | xargs mv -t stuff/

drmaciver · 2009-12-07 13:13:14 6
Fill up disk space (for testing)

Put into some file. No special purpouse, just for fun...
This is sample output - yours may be different.
1

tail $0 >> $0

yooreck · 2009-12-07 12:33:41 4
Killing multiplpe process for one program like apache, wget, postfix etc.
This is sample output - yours may be different.
-2

ps ax| awk '/[h]ttpd/{print $1}'| xargs kill -9

r00t4u · 2009-12-07 09:53:18 4
‹ First < 420 421 422 423 424 > 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

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"

Resolution of a image

You can use the -format switch to get the size of the image. Replace "logo:" with your image.

I hate `echo X | Y`

apart from not being generalisable to all shells, `Y <<< X` seems nicer to me than `echo X | Y`, e.g. $ <<< lol cat; it reads easier, you type less, and it also looks cool

Symlink all files from a base directory to a target directory

Find out what the day ends in

Several people have submitted commands to do this, but I think this is the simplest solution. It also happens to be the most portable one: It should work with any sh or csh derived shell under any UNIX-like OS. Oh by the way, with my German locale ($LC_TIME set appropriately) it prints "g" most of the time, and sometimes (on Wednesdays) it prints "h". It never prints "y".

Set audible alarm when an IP address comes online

Waiting for your server to finish rebooting? Issue the command above and you will hear a beep when it comes online. The -i 60 flag tells ping to wait for 60 seconds between ping, putting less strain on your system. Vary it to your need. The -a flag tells ping to include an audible bell in the output when a package is received (that is, when your server comes online).

Daemonize nc - Transmit a file like a http server

Allow to launch nc like a daemon, in background until you still stop it. You can stop it with kill %1 (jobs method) or kill PID. The -k option can force nc to listen another connection, but if you use redirection, it will work only one time. The loop's inside doesn't do anything, but we can imagine to send a message to screen when a connection is established

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"

send substituted text to a command without echo, pipe

zsh only - This avoids the need for echo "message" | which creates an entire subshell. Also, the text you are most likely to edit is at the very end of the line, which, in my opinion, makes it slightly easier to edit.

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