Commands tagged wikipedia (6)

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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"

Display network pc "name" and "workgroup"
Checks for PC samba name and workgroup. Works fine for Windows hosts and Linux/UNIX PCs running Samba.

Nicely display permissions in octal format with filename
Nicely display permissions in octal format and filename for a given directory

Remove a line from a file using sed (useful for updating known SSH server keys when they change)
remove the host for the .ssh/know_host file

Download and extract a *tar.gz file with curl.

Rename files in batch

extract email addresses from some file (or any other pattern)

Watch the progress of 'dd'
This version was mentioned in the comments. Credits go to flatcap.

Scan for new SCSI devices
Issues a scan command on the given scsi host adapter (ex. a fibre channel adapter, in the example above on host0). Output can be watched in the messages log or in "dmesg"

Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested


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