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Find brute force attempts on SSHd
Searches the /var/log/secure log file for Failed and/or invalid user log in attempts.

List your MACs address
No need for the ls -r and a sort is also not really needed.

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Get your outgoing IP address
should be very consistent cause it's google :-)

Export OPML from Google Reader

Get IPv4 of eth0 for use with scripts
Combines wgzhao's grep | awk | sed into one awk command.

Search shoutcast web radio by keyword
Searches for web radio by submitted keyword and returns the station name and the link for listing . May be enhanced to read user's selection and submit it to mplayer.

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"

Sum columns from CSV column $COL

Get the beats per minute from an audio track
Requires bpm-tools https://www.pogo.org.uk/~mark/bpm-tools/


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