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check open ports (both ipv4 and ipv6)

prevents replace an existing file by mistake
Use set +o noclobber and you will be able to replace files again

Find the biggest files
Also: * find . -type f -exec ls -s {} \; | sort -n -r | head -5 * find . -type f -exec ls -l {} \; | awk '{print $5 "\t" $9}' | sort -n -r | head -5

Check SSH public and private keys matching
Tested in bash4

Connect via sftp to a specific port
I use this for connect via sftp to a server listening on a non default ssh port.

Single use vnc-over-ssh connection
This command 1. SSH into a machine 2. Tunnels VNC port to your local computer ("-L 5900:localhost:5900") 3. Runs a single use vnc server ("x11vnc -safer -localhost -nopw -once -display :0") 4. Goes into the background ("-f") 5. Runs VNC viewer on the local computer connecting to the remote machine via the newly created SSH tunnel ("vinagre localhost:5900")

Show all current listening programs by port and pid with SS instead of netstat

RELINK a lot of broken symlinks - FIX broken symlinks after rsync site to new server
After you run this script, you can check status for broken symlink with this command: find -L . -type l

Find the package that installed a command

print text in colors green, cyan, blue or red (see sample output for usage)


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