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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.

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SHA256 signature sum check of file
get the SHA256 sum signatur for a file

See system users

start a vnc server session to connect to a gdm login screen

Search some text from all files inside a directory

Test load balancers
With the "--resolve" switch, you can avoid doing DNS lookups or edit the /etc/hosts file, by providing the IP address for a domain directly. Useful if you have many servers with different IP addresses behind a load balancer. Of course, you would loop it: $ for IP in 10.11.0.{1..10}; do curl --resolve subdomain.example.com:80:$IP subdomain.example.com -I -s; done

Big Countdown Clock with hours, minutes and seconds
Figlet is easy to find for download on the internet, and works for any text. Quite cool.

New Maintainer for CommandLineFu
Welcome to Jon H. (@fart), the new maintainer of CommandLineFu. . In the absence of a forum, I encourage people welcome him, here, in the comments. . Also... What would you like to improve/change about the site?

delete at start of each line until character
GNU grep's PCRE(Perl-compatible regular expressions).

Print line immediately before a matching regex.
Use this if you don't have access to GNU grep's -B option.

Determine next available UID
Typical usage would be in a script that would want the next open UID in a range (in this case 500-600)


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