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.

Universal configuration monitoring and system of record for IT.
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

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!
Hide

Top Tags

Hide

Functions

Hide

Credits

Tweak system files without invoking a root shell

Terminal - Tweak system files without invoking a root shell
echo "Whatever you need" | sudo tee [-a] /etc/system-file.cfg
2009-03-09 01:33:31
User: asmoore82
Functions: echo sudo tee
4
Tweak system files without invoking a root shell

only for sudo-style systems.

Use this construct instead of I/O re-directors ``>'' or ``>>'' because

sudo only elevates the commands and *not* the re-directors.

***warning: remember that the `tee` command will clobber

file contents unless it is given the ``-a'' argument

Also, for extra security, the "left" command is still run unprivileged.

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

sudo vim /etc/system-file.cfg

Comment by linuxrawkstar 323 weeks and 4 days ago

[quote]sudo vim /etc/system-file.cfg[/quote]

Yes, of course, but if all you need to do is replace the contents of a file with a one-liner,

the pipe is quicker - esp. when remotely managing a server.

If you need to type the full path of some file into a config file,

the pipe is quicker **and more accurate**

such as:

ls /var/log/samba/log.winbindd | sudo tee -a /etc/some-file.cfg sudo vi /etc/some-file.cfg

... you will know if your path and file are correct before

even vim-ing the config file.

Comment by asmoore82 323 weeks and 4 days ago

Your point of view

You must be signed in to comment.