(LINUX)User Account Expiry

Problem Statement:

-> Login to server

->sudo su -

->cd /home/<user_name>/.ssh

->vim authorized_keys

1. Check if public key is correct.

2. Check if mode of file is 600, if not do chmod 600 authorized_keys

3. Check mode of .ssh directory, it should be 700

Problem Statement:

-> Login to server

-> sudo su -

-> passwd username

-> set new passwd

Postfix config for SES in Linux