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



Show how old your linux OS installtion is

Terminal - Show how old your linux OS installtion is
sudo tune2fs -l $(df -h / |(read; awk '{print $1; exit}')) | grep -i created
2013-08-08 15:18:09
User: thechile
Functions: awk df grep sudo tune2fs
Show how old your linux OS installtion is

..not guaranteed to always be accurate but fun to see how old you Linux installation is based on the root partitions file system creation date.


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

This is cool!

A very slight simplification:

sudo tune2fs -l $(df --output=source / | tail -1) | grep -i created
Comment by michelsberg 142 weeks and 6 days ago

If you do it like this:

# tune2fs -l `df --output=source / | tail -1` | grep -i created

It'll also work on all Bourne compat shells, not only BASH.

Comment by kernel01 142 weeks and 2 days ago

Could be improved by just adding -l option to df, in order not to add delay for non local FS:

sudo tune2fs -l $(df -lh / |(read; awk '{print $1; exit}')) | grep -i created
Comment by TerDale 141 weeks ago
tune2fs -l $(mount | awk '/ \/ / {print $1}') | grep -i created
Comment by dennisw 140 weeks and 4 days ago

If your are cloning, ghosting or using Acronis to distribute your OS this command reflects the image create not how old that particular hardware installation is.

I tested this on a system I just "built" from an Acronis backup and the date was before the server was even manufactured.

Comment by RGombert 139 weeks and 6 days ago

Your point of view

You must be signed in to comment.