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.

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



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

View internet connection activity in a browser

Terminal - View internet connection activity in a browser
lsof -nPi | txt2html > ~/lsof.html
2011-07-28 14:01:21
User: zlemini
View internet connection activity in a browser

The output of lsof is piped to txt2html which converts it to html.

# Perl module HTML::TextToHTML needed


There are 4 alternatives - vote for the best!

Terminal - Alternatives
lsof -nPi | txt2html > ~/lsof.html | gnome-open lsof.html
2011-07-28 21:59:07
User: hippie
Tags: bash lsof

In addition to generating the current connections, it also opens then in your default browser on gnome.

Know a better way?

If you can do better, submit your command here.

What others think

Without augmenting the txt2html arguments or template, this is similar to (echo ""; lsof -nPi; echo "") > lsof.html

Comment by hpavc 304 weeks and 1 day ago

Compare both in a browser and you will see that txt2html is superior.

Comment by zlemini 304 weeks and 1 day ago

txt2html just puts '' around the output of lsof, and makes hyperlinks of the entries in the 'NAME' column, for host/port pairs that do not talk HTTP so the links are not useful. Installing HTML::TextToHTML for this is inefficient -- you can do the same with

( echo '<pre>'; sudo lsof -nPi; echo '</pre>' ) >/tmp/lsof.html

... but why load up the bulk of a web browser for viewing text/plain document?

Comment by Mozai 304 weeks ago

I used to rely on echo for this and it was painful.

HTML is far superior and is simple to install:

cpan App::cpanminus

cpanm HTML::TextToHTML

From man page:


txt2html converts plain text files to HTML.

It supports headings, tables, lists, simple character markup, and hyperlinking, and is highly customizable. It recognizes

some of the apparent structure of the source document (mostly whitespace and typographic layout), and attempts to mark

that structure explicitly using HTML. The purpose for this tool is to provide an easier way of converting existing text

documents to HTML format.

One can use txt2html as a filter, outputting the result to STDOUT, or to a given file.

One can define options in a config file as well as on the command-line.

Comment by zlemini 304 weeks ago

Your point of view

You must be signed in to comment.