List all processes: # ps -aux | less User if of user: id -u <username> echo $UID SSL: https://medium.com/internshala-tech/adding-self-trusted-ssl-certificate-for-localhost-on-ubuntu-nginx-c66d70b22e4b No sound - reset sound settings killall pulseaudio rm -r ~/.config/pulse/* rm -r ~/.pulse* For Disk usage exploration: sudo apt-get install ncdu ncdu /