Commands by jcollado (1)

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

Check if a domain is available and get the answer in just one line
Returns nothing if the domain exists and 'No match for domain.com' otherwise.

Record microphone input and output to date stamped mp3 file
record audio notes or meetings requires arecord and lame run mp3gain on the resulting file to increase the volume / quality ctrl-c to stop recording

In-Place search/replace with datestamped backup
Does an in situ search-replace but leaves a datestamped backup. A variation with more precision: sed -i.`date +%Y%m%d%H%M%S 's/pattern/replace' [filename]

Clean up poorly named TV shows.
Replace 'SHOWNAME' with the name of the TV show. Add -n to test the command without renaming files. Check the 'sample output'.

Simple colourized JSON formatting for BASH
Leave out pygmentize or `pip install pygments` first.

List every file that has ever existed in a git repository
What was the name of that module we wrote and deleted about 3 months ago? windowing-something? $ git log --all --pretty=format:" " --name-only | sort -u | grep -i window

AWK: Set Field Separator from command line

Given $PID, print all child processes on stdout
Simpler.

Start screen with name and run command
Runs an instance of screen with name of "name_me" and command of "echo "hi"" To reconnect to screen instance later use: screen -r name_me

Get all URLs from webpage via Regular Expression
Get all URLs from website via Regular Expression... You must have lynx installed in your computer to execute the command. --> lynx --dump "" | egrep -o "" - Must substitute it for the website path that you want to extract the URLs - Regular Expression that you wanna filter the website


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: