added enable ssh pw auth

linux.md

@@ -325,4 +325,18 @@ EOF
 sudo netplan apply
 ```
 
+</details>
+
+<details><summary><b>Enable ssh password authentication</b></summary>
+
+```bash
+vi /etc/ssh/sshd_config
+# set this variable to yes to allow passwords
+PaswordAuthentication yes
+# Restart Service
+sudo systemctl restart ssh
+# Copy public key to remote machine
+ssh-copy-id [email protected]
+```
+
 </details>