Hide

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.

Hide

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:

Hide

News

2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
Hide

Tags

Hide

Functions

Print all the lines between 10 and 20 of a file

Terminal - Print all the lines between 10 and 20 of a file
head -n 20 <filename> | tail
2010-11-15 13:08:12
User: jamolkhon
Functions: head
-6
Print all the lines between 10 and 20 of a file

Alternatives

There are 9 alternatives - vote for the best!

Terminal - Alternatives
sed -n '10,20p' <filename>
2009-02-08 22:34:04
User: ergut
Functions: sed
54

Similarly, if you want to print from 10 to the end of line you can use: sed -n '10,$p' filename

This is especially useful if you are dealing with a large file. Sometimes you just want to extract a sample without opening the entire file.

Credit goes to wbx & robert at the comments section of http://www.commandlinefu.com/commands/view/348/get-line1000-from-text.#comment

sed -n 5p <file>
2009-10-15 11:00:48
User: Waldirio
Functions: sed
37

You can get one specific line during any procedure. Very interesting to be used when you know what line you want.

awk 'NR >= 3 && NR <= 6' /path/to/file
2011-12-14 14:28:56
User: atoponce
Functions: awk
Tags: awk
6

This command uses awk(1) to print all lines between two known line numbers in a file. Useful for seeing output in a log file, where the line numbers are known. The above command will print all lines between, and including, lines 3 and 6.

sed -n '3,6p' /path/to/file
2011-12-14 15:09:38
User: flatcap
Functions: sed
Tags: sed
6

Print all lines between two line numbers

This command uses sed(1) to print all lines between two known line numbers in a file. Useful for seeing output in a log file, where the line numbers are known. The above command will print all lines between, and including, lines 3 and 6.

sed '10,20!d'
2011-03-31 15:30:24
User: tr00st
Functions: sed
3

Subtly different to the -n+p method... and probably wrong in so many ways....... But it's shorter. Just.

Know a better way?

If you can do better, submit your command here.

Your point of view

You must be signed in to comment.

Related sites and podcasts