Command Lines Part 2

Converting Files

Images

Convert from jpg to png?

$ convert image.jpg image.png 

Networking Stuff

Arp

Have a look at who on the network own which IP address:

$ arp

Ping

Is a server alive?

$ ping 8.8.8.8

Traceroute

Where are the network issues between us and them?

$ traceroute www.nuim.ie

Nmap

Scan the local 255 host subnet.

$ nmap 192.168.1.0/24

1-Liners

What is the total disk size of all MarkDown files in my homedir?

$ find ~ -name "*.md" | xargs du -ch

Generate numbers in a random order

echo {01..10} | sed 's/ /\n/g' | shuf -