SSH

Secure Shell (SSH) Tips & Tricks:

Passwordless SSH Aunthentication
ssh-keygen [Press enter key 3 times] ssh-copy-id -i ~/.ssh/id_rsa.pub -p 2222 user@example.com user@example.com's password:xxxxxxxxxxx ssh -p 2222 user@example.com

Alternative:

Add the following to .bashrc file: alias easyssh='sshpass -p passwd ssh user@example.com -p 2222'

But this may be a security issue as password can be found from logs & this file.

MySQL connection over SSH tunnel
ssh -f user@ssh.server.com -L 3307:mysql1.server.com:3306 -N

Then at localhost: mysql -h 127.0.0.1 -P 3307 -u dbuser -p db

Use Key-less SSH login to skip password entry.

Copy files via SSH
scp -rp FILE_NAME USERNAME@HOST:DEST_PATH sshpass -p nsroot scp -rp nsroot@10.107.88.78:/nsconfig/ns.conf conf.txt

Disable SSH timeout
Completely disable SSH timeout

sudo nano /etc/ssh/sshd_config

TCPKeepAlive yes ClientAliveInterval 30 ClientAliveCountMax 99999

sudo service sshd restart