Commands by Mirandajoye (0)

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formatting number with comma
it is not work with Cygwin's bash3.X. Test in Linux. use printf "%'f" number while it is floating point number

nmap port scanning
TCP Connect scanning for localhost and network 192.168.0.0/24

Rename files in batch

Watch the progress of 'dd'
Pressing ctrl-t will display the progress

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Kill a process by its partial name (BSD/Mac)
This kills Activity Monitor

Analyze awk fields
translate and number lines is simpler and you use tr to choose your delimiter (eg for csv files)

list block devices
Shows all block devices in a tree with descruptions of what they are.

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

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"


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