See which version of unix we’re on (useful inside a Docker container)
cat /etc/os-release
get approx. size of a dir ( and everything in it)
du -sh [DIRNAME]
eg du -sh ./wherelara/
See what ports are open
sudo lsof -i -P -n | grep LISTEN
Kill all docker containers
docker container kill $(docker ps -q)
Show all files that contain certain text (in their body, not the filename)
grep ‘Math.PI’ ./* -Rl
this searches for the txt ‘Math.PI’ in all files in this directory (and any child directories), print only the filename (and path) on match
-R recursive
-l show filename
Docker show networking information about a running container (eg internal IP address etc)
docker inspect [CONTAINER ID]
e.g.
docker inspect e350390fd549