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.


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

Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Terrorist threat level text

Terminal - Terrorist threat level text
xmlstarlet sel --net -t -o "Terrorist threat level: " -v [email protected] http://is.gd/wacQtQ
2011-01-31 04:18:12
User: kzh
-3
Terrorist threat level text

Using XSLT.

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
echo "Terrorist threat level: `od -An -N1 -i /dev/random`"
2011-01-28 03:16:21
User: ntropia
Functions: echo
9

This line provides the same result by reading the output of a less arbitrary value.

This is a personal choice on the matter, and the result on different machines may vary.

echo "Terrorist threat level: $(wget -q -O - http://is.gd/wacQtQ | tail -n 1 | awk -F\" '{ print $2 }')"
echo "Terrorist threat level: $(curl -s 'http://www.dhs.gov/dhspublic/getAdvisoryCondition' | awk -F\" 'NR==2{ print $2 }')"
2011-01-28 00:23:13
User: infinull
Functions: echo
0

Used curl instead of wget (minor change)

Used the full-url instead of the shortened one (in case is.gd goes down/empties their cache)

turned the tail | awk bit into a single awk command.

echo "Terrorist threat level: `sed $(perl -e "print int rand(99999)")"q;d" /usr/share/dict/words`"
2011-01-28 09:49:37
User: houghi
Functions: echo
-1

Numbers are less understandable then words. Also this may put out a different result.

Know a better way?

If you can do better, submit your command here.

What others think

Can someone explain me what do you mean by "Terrorist threat level:" ?

Comment by RanyAlbeg 290 weeks and 6 days ago

Terrorist threat level as determined by the US Department of Homeland Security.

By the way, what's with the downvotes? Is my command not a good solution? I am showing a viable alternative that is shorter than the others.

Comment by kzh 290 weeks and 6 days ago

I wonder why this site exists at all, and why do you parse it for a shell script?

if [[ $(ter_t_level) == ELEVATED ]]; then

Buy guns and ammo

fi

Comment by RanyAlbeg 290 weeks and 5 days ago

Your point of view

You must be signed in to comment.