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/
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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:
left-most column is PID, middle is virtual memory being consumed, right-most is actual process.
shows you the symlinks in the current directory, recursively, but without following them
Choose the /var/log/sa/saXX log based on what day you want to view. You can use ifconfig to find the name of the interface.
You can use the -s flag to specify a certain time period, e.g. -s 12:00:00 -e 14:00:00
Then you can remove the specific entry:
iptables -D INPUT 10
Just make sure these are set:
Else your changes won't stick when you restart iptables.
See the members of a group
Add a user to a group