What's this?

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/

Get involved!

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.

Universal configuration monitoring and system of record for IT.

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:



May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

Top Tags



grep apache access.log and list IP's by hits and date - sorted

Terminal - grep apache access.log and list IP's by hits and date - sorted
grep Mar/2009 /var/log/apache2/access.log | awk '{ print $1 }' | sort -n | uniq -c | sort -rn | head
2009-03-10 16:46:19
User: allinurl
Functions: awk grep sort uniq
grep apache access.log and list IP's by hits and date - sorted


There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think


Comment by linuxrawkstar 384 weeks and 5 days ago

Cleaner and less redundant:

awk '/Mar\/2009/ {print $1};' /var/log/apache2/access.log | sort | uniq -c | sort -rn | head
Comment by atoponce 384 weeks and 4 days ago

I do atoponce's version but pipe it to mail me the top 50 so I can keep an eye on any odd behavior.

Comment by lizzard 382 weeks ago

I had to change "sort -nr" to "sort --key=1nr,1nr" to get it sorted rigth (Ubuntu Linux). Warning : "-nr" did not produce an unsorted list but in an aproximately sorted list. This error may not be visible if you only display the head or tail since they look "sorted".

Comment by bleck 215 weeks ago

Your point of view

You must be signed in to comment.