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Temporarily suspend and unsuspend a foreground job
Press ^Z, do what you need to do on the shell, then input % to resurrect the suspended job.

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"

Extract tar content without leading parent directory
If archive has leading directory level same as archive name and you want to strip it, this command is for you.

list all opened ports on host

Copy ssh keys to user@host to enable password-less ssh logins.
Alternative for machines without ssh-copy-id

List files size sorted and print total size in a human readable format without sort, awk and other commands.

change to the previous working directory

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"

Adjust all EXIF timestamps in .mov by +1 hour
works for Powershot SD780 IS

Transfer large files/directories with no overhead over the network
This invokes tar on the remote machine and pipes the resulting tarfile over the network using ssh and is saved on the local machine. This is useful for making a one-off backup of a directory tree with zero storage overhead on the source. Variations on this include using compression on the source by using 'tar cfvp' or compression at the destination via $ ssh user@host "cd dir; tar cfp - *" | gzip - > file.tar.gz


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