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:
Image to text converter.
Convert your scanned book in image format like .png, .jpg into editable text format.
OCR ==> Optical Code Reader
Show message in file "welcome" to all logged in terminal users.
tell you how many Non free software is on your machine, which package it is and which restriction on freedom it has . require vrms package , vrms mean virtual Richard M. Stallman :)
All with only one pipe. Should be much faster as well (sort is slow). Use find instead of ls for recursion or reliability.
Edit: case insensitive
Seems obvious, but other seemingly simple ways to use it don't work:
-bash: !whammy: event not found
with the slash :(
you can also do any combinations of quotes for a complex string:
echo "It's great to be able to use a bang ("'!'") in a command"'!'
It's great to be able to use a bang (!) in a command!
no need for seq or eval
List only hidden files (or directories). You also can use:
ls -lad .*
display beautiful tree ... "tree dir" display tree from "dir".
all files in the directory get moved, in doing so the new name of the file is the original name with out spaces (using translate command)
I wrote a script called bootstrap.py to delete the database, then load a new database with initial values. With this single-line shell loop, when I need to make a schema change (which happens often in the early stages of some projects), I hit ctrl-C to stop the running Django server, then watch bootstrap.py do its thing, then watch the server restart.
Just put this line in a file that resides in your /etc/cron.d/ folder, and you're set.
The -q option is used to suppress php headers.
You'll need to install sox and flac packages in Debian/Ubuntu.
Deletes thousands of files at one go, I'm not able to recall the exact # of files that rm can delete at one go(apprx. around 7000.)
plays with bash arrays. instead of storing the list of files in a temp file, this stores the list in ram, retrieves the last element in the array (the last html file), then removes it.
Strips comments from at least bash and php scripts. Normal # and // as well as php block comments
removes all of the:
lines beginning with #
lines beginning with //
lines beginning with /*
lines beginning with a space and then *
lines beginning with */
It also deletes the lines if there's whitespace before any of the above.
Add an alias to use in .bashrc like this:
alias stripcomments="sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//' -e '/^$/d' -e '/^\/\/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d'"
Change YOUR TEXT HERE to the text you want.
On figlet -f banner, you can change it to any figlet font you have installed.
One variant for Star Wars fans could be this:
while [ 1 ]; do clear; echo 'Star Wars' | figlet -f starwars -t | while IFS="\n" read l; do echo "$l"; sleep 0.01; done; done
NOTICE: You need to install figlet.
On Ubuntu, this command is:
sudo apt-get install figlet
On Debian, this command is:
aptitude install figlet
Displays SuSE release information
Like the http://www.commandlinefu.com/commands/view/6327/open-file-with-sudo-when-there-is-no-write-permission, but works (in zsh; my commandlinefu is not strong enough to understand why bash don't like it) with vim options, like -O, and many input files.
There could be other mistakes.