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.

OpenID
or
Sign in Register

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

Hide

Credits

Site by David Winterbottom (user root).

find the device when you only know the mount point

Terminal - find the device when you only know the mount point
df | grep -w /media/KINGSTON | awk {'print $1'}
2011-01-20 09:07:19
User: vilain_mamuth
Functions: awk df grep
-3
Up
Down
find the device when you only know the mount point

most usefull when creating batch scripts using several usb drives and some commands like mkntfs needs a device name

the -w option for grep is here to filter lines when you have multiple drives with the same volume label. Without this option, the grep command will return

/media/KINGSTON

/media/KINGSTON_

/media/KINGSTON__

Show sample output | Add to favourites | Report as malicious

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
df -P | awk '$6=="/media/KINGSTON" {print $1}'
2011-01-21 00:32:00
User: linuts
Functions: awk df
0
Up
Down
find the device when you only know the mount point

No need for grep | awk. -P on df will force the mount point to be on the same line as the device

Comments (1) | Add to favourites | Report as malicious
awk '$2 == "/media/KINGSTON" {print $1}' /etc/mtab
2014-09-21 23:04:30
User: Ikem
Functions: awk
0
Up
Down
find the device when you only know the mount point

Reduced to only one command. :)

Comments (0) | Add to favourites | Report as malicious
df /media/mountpoint |egrep -o '^[/a-z0-9]*'
2011-01-24 21:14:55
User: DaveQB
Functions: df egrep
Tags: grep,df
-1
Up
Down
find the device when you only know the mount point

Shorter way to find the device for a given mountpoint

Comments (0) | Add to favourites | Report as malicious
grep -w /media/KINGSTON /proc/mounts | cut -d " " -f
2011-01-25 23:45:35
User: BorneBjoern
Functions: cut grep
-1
Up
Down
find the device when you only know the mount point

less ressources (processes) needed

Show sample output | Comments (0) | Add to favourites | Report as malicious
mount | grep "mount point"
2011-01-31 10:21:09
User: mimivx
Functions: grep mount
-1
Up
Down
find the device when you only know the mount point
Comments (0) | Add to favourites | Report as malicious

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