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List all installed PERL modules by CPAN
This command will give you the detailed information about the installed perl modules i.e. installed path, Link type, version, files etc.

ls -hog --> a more compact ls -l
I often deal with long file names and the 'ls -l' command leaves very little room for file names. An alternative is to use the -h -o and -g flags (or together, -hog). * The -h flag produces human-readable file size (e.g. 91K instead of 92728) * The -o suppresses the owner column * The -g suppresses the group column Since I use to alias ll='ls -l', I now do alias ll='ls -hog'

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

List .log files open by a pid
Uses lsof to display the full path of ".log" files opened by a specified PID.

Top 15 processes with the largest number of open files
See the summary.

Add a Clock to Your CLI

Sort by IP address

One-liner to generate Self-Signed SSL Certificate+Key without any annoying prompts or CSRs
Handy if you want to quickly generate a self-signed certificate. Also can be used in your automated scripts for generating quick-use certificates.

Rip a DVD to AVI format
Substitute whatever track number you want into the "dvd://1" parameter. The "-aid 128" is to select the English language.

check open ports without netstat or lsof


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