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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"

nmap get all active online ips from specific network
scan whole specific network for active online ips

Show numerical values for each of the 256 colors in ZSH
This will show a numerical value for each of the 256 colors in ZSH. Everything in the command is a ZSH builtin, so it should run on any platform where ZSH is installed. Prints one color per line. If someone is interested in formatting the output, paste the alternative.

Opens an explorer.exe file browser window for the current working directory or specified dir (Fixed)
This alternative either opens the current working directory by just issuing the open function in the commandline. Or you can specify what directory you would like to open. Example: open /cygdrive/c/Windows Usage: open [path] When no option is specified it will open the current working directory

Converts to PDF all the OpenOffice.org files in the directory
Requieres unoconv (debian package)

list files recursively by size

Number of CPU's in a system
this works for a Linux based system, other UNIX systems may have other way(s) to check the number of CPUs.

Find files with the same names in several directories.
cat file1 file2 file3|sort|uniq -d finds the same lines in several files, especially in files with lists of files.

Forwards connections to your port 2000 to the port 22 of a remote host via ssh tunnel

Show max lengths of all fields in a pipe delimited file with header row


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