Commands using cat (514)

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Stop and continue processing on a terminal
This will send the ASCII sequence for DC3 to the currently running tty which results in SIGSTOP (19). You can continue with ASCII sequence for DC1 by pressing CTRL+q which results in SIGCONT (18).

List all NPM global packages installed

df without line wrap on long FS name
-P uses the POSIX output format, which makes information on each file system always printed on exactly one line. "column -t" makes a table from the input.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Tail a log and replace according to a sed pattern
Tails a log and replaces it line-by-line according to whatever you want to replace. Useful if the file writing to the log can't be modified, so you need to modify its output instead.

Fill up disk space (for testing)
Put into some file. No special purpouse, just for fun...

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

Show all machines on the network
Depending on the network setup, you may not get the hostname.

check open ports without netstat or lsof


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