Some neat cli utilities

[UtwigMU]

Want to do speedtest on remote server but have no GUI?
Try speedtest-cli

Want to know your public IP?
curl canihazip.com

Want to download youtube video and/or rip mp3 from them but fear payware/nagware/payload/limitations youtube downloaders? This works in Windows too if you have windows subsystem for Linux installed - install youtube-dl (apt install youtube-dl in default ubuntu WSL)
Example:
youtube-dl --extract-audio --audio-format mp3 <video URL>

Want to know more about your system?
hwinfo
hwinfo --gfxcard

Want to know which RAM modules has the ebay seller installed in your system and other BIOS info?
dmidecode

Want to know your CPU temps?
install lm-sensors or sensors and then use lm-sensors or sensors (depends on your distro how they call it)

Want to see cool info about your system to post screnshot on forum?
screenfetch or neofetch

Want to resize a bunch of images in a folder to send to friend?
Install imagemagick
convert
for file in *.jpg; do convert $file -resize 1024x768 $file; done

SD Card is corrupt?
use dd to copy bad card to new card or disk image file which you then mount.
use testdisk and photorec to find images