commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. 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.
If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/
You can sign-in using OpenID credentials, or register a traditional username and password.
First-time OpenID users will be automatically assigned a username which can be changed after signing in.
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.
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:
Take a folder full of files and split it into smaller folders containing a maximum number of files. In this case, 100 files per directory.
find creates the list of files
xargs breaks up the list into groups of 100
for each group, create a directory and copy in the files
Note: This command won't work if there is whitespace in the filenames (but then again, neither do the alternative commands :-)
With a lolcat favicon if you access it from your browser
rename command in my system -Fuduntu running 2.6.38 Linux Kernel- is an ELF 64-bit LSB executable, not a Perl script. man page for rename command shows syntax as "rename from to where" (or something like that), so I am doing just what I have been told...
echo "ls" > script.bash;
This is my script, a simple 'ls'.
gpg -c script.bash;
Here I encrypt and passord-protect my script. This creates file script.bash.gpg.
cat script.bash.gpg | gpg -d --no-mdc-warning | bash
Here I open file script.bash.gpg, decrypt it and execute it.
self explanatory see sample output
Crop several images by imagemagik's convert command. substitute , ,, with pixel value and with a different existent directory.
but you can't see the colors in that sample output :(
Although Exim will purge frozen (undeliverable) messages over time, the command "exim -Mrm #id#" where #id# is a particular message ID will purge a message immediately. Being lazy, I don't want to type the command for each frozen message, so I wrote the one-liner to do it for me.
Will unmount a mount that has already dropped but is locked by a process.
cut -f1 -d\<TAB>
EXACT time in Germany. :)
Old drive with lots of music or unsorted drive? This command will play all mp3 files in a folder and after playing one song or pressing q, it will ask you if you want to delete the file.
Calc the rough time from Twitter. Now with leading Zeroes.
Using tape archive create a tar file in Stdout (-) and pipe that into a compound command to extract the tar file from Stdin at the destination. This similar to "Copy via tar pipe ...", but copies across file systems boundaries. I prefer to use cp -pr for copying within the same file system.
It can be used to create an index of a backup directory or to find some file.
Here's a version that uses netcat (although I'd much rather use curl!).
specific information about your intel CPUs in your system and their features