Commands tagged firewall (8)

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

Clear current session history (bash)

Number of CPU's in a system
this works for a Linux based system, other UNIX systems may have other way(s) to check the number of CPUs.

Copy all documents PDF in disk for your home directory
I used this to copy all PDFs recursively to a selected dir

Get your external IP address if your machine has a DNS entry
Using DynDNS or a similar service not only allows access to your home machine from outside without needing to know what IP the ISP has assigned to it but it also comes in handy if you want to know your external IP address. The only purpose of the sed command is to remove the leading "host.na.me has address " part from the output. If you don't need to discard it you can simply use $ host $HOSTNAME

Clone perms and owner group from one file to another
Copy both perms and owner group from one file to another.

String to binary
Cool but useless.

Boooted as EFI/UEFI or BIOS

Copy via tar pipe while preserving file permissions (run this command as root!)
It's the same like 'cp -p' if available. It's faster over networks than scp. If you have to copy gigs of data you could also use netcat and the tar -z option in conjunction -- on the receiving end do: # nc -l 7000 | tar -xzvpf - ...and on the sending end do: # tar -czf - * | nc otherhost 7000

Convert JSON to YAML
Requires installing json2yaml via npm: npm install -g json2yaml (can also pipe from stdin) Ref: https://www.npmjs.com/package/json2yaml


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