Day to Day learning

Ubuntu Networking file Ubuntu 18 user@ubuntu:  /etc/netplan/01-netcfg.yaml Ubuntu 16 (different path) Change user su usernameX find Ip address  hostname -I List all installed apt list --installed disable password login edit file  /etc/ssh/sshd_config replace line with PasswordAuthentication no Restart your ssh server using sudo service ssh restart [or] sudo restart ssh List block (list drives) lsblk History (list of commands used earlier) history

// Comment public class Testing { public Testing() { } public void Method() { /* Another Comment on multiple lines */ int x = 9; } }