Commands by wickedcpj (2)

  • lsof - cleaned up for just open listening ports, the process, and the owner of the process

    another formatting/oneliner for lsof User - Process - Port Show Sample Output


    3
    alias oports="echo 'User: Command: Port:'; echo '----------------------------' ; lsof -i 4 -P -n | grep -i 'listen' | awk '{print \$3, \$1, \$9}' | sed 's/ [a-z0-9\.\*]*:/ /' | sort -k 3 -n |xargs printf '%-10s %-10s %-10s\n' | uniq"
    wickedcpj · 2011-08-02 04:54:25 0
  • Connects to a telnet service monitoring Woot!

    Gives you an updating woot! item tracker! Show Sample Output


    -6
    telnet zerocarbs.wooters.us
    wickedcpj · 2010-06-26 05:50:48 0

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. 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.

Share Your Commands

Check These Out

How to check network connection from one interface
This command only check the network connection from given eth. This is very useful if you are using more then one interface in your server or laptop.

Run a bash script in debug mode, show output and save it on a file
Sends both stdout and stderr to the pipe which captures the data in the file 'out.test' and sends to stdout of tee (likely /dev/tty unless redirected). Works on Bourne, Korn and Bash shells.

Get a process's pid by supplying its name

return external ip
Return IP information about your external ip address with JSON format

Check variable has been set

Command to keep an SSH connection open
This runs the uptime command every 30 seconds to avoid an SSH connection dropping due to inactivity. Granted there are better ways of solving this problem but this is sometimes the right tool for the job.

Display 6 largest installed RPMs sorted by size (descending)
Low on disk space? Check the largest installed RPMs for delete canditates.

Get pages number of the pdf file

extract email adresses from some file (or any other pattern)
Simply more email-adresses matched

purge all packages marked with 'rc'
After you install/remove lots of packages, there are many packages marked with 'rc'. This script help you to purge these packages, it will save some spaces from your disk.

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: