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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

Show permissions of current directory and all directories upwards to /
Useful if a different user cannot access some directory and you want to know which directory on the way misses the x bit.

Use nroff to view the man pages
Using nroff , it is possible to view the otherwise garbled man page with col command.

count how many cat processes are running
'ps ax' provides the fill list of running processes. 'grep -c [c]at' will find all processes that match 'cat' without matching itself....

validate json
I have this saved as jsonlint chmodded +x and file.js is instead $1, but YMMV

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"

grep apache access.log and list IP's by hits and date - sorted

Get MD5 checksum from a pipe stream and do not alter it

Display the definition of a shell function
Display the code of a previously defined shell function.

Rename all files in lower case
rename is a really powerfull to, as its name suggests, rename files

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