Step 1: Download https://www.eff.org/files/2016/07/18/eff_large_wordlist.txt

Step 2: run the following in the terminal

shuf -n 20 eff_large_wordlist.txt

Step 3: choose two good looking words from the output

Step 4: smoosh them together with optional underscore or capitalization

Now you have a tasty username worth sharing with friends and family!

dmesg is always fun though nowadays it requires root or sudo

other hot utilities that start with ls: lsblk lspci lsusb lsmod

or you can just cat random /proc or /sys files

I suppose if you want to read some logs and are running systemd you can journalctl

honorary mentions to hdparm, smartmontools, lm-sensors