Banner is something which you will see before or after you login to a particular system.
In this post I will show you how to create a banner to give a info about the machine which the user is about to access.
Check this file in your machine
# cat /etc/issue
CentOS release 6.2 (Final)
Kernel r on an m
or
# cat /etc/issue.net
CentOS release 6.2 (Final)
Kernel r on an m
This is the file which is read before you login to the machine so we will make some changes here:
# vi /etc/issue
This node contains Oracle Database 11gR2 and the owner of this node is Deepak.
This file is read after you log in successfully to your node
CentOS release 6.2 (Final)
Kernel r on an m
This is the file which is read before you login to the machine so we will make some changes here:
# vi /etc/issue
This node contains Oracle Database 11gR2 and the owner of this node is Deepak.
This file is read after you log in successfully to your node
# vi /etc/motd
Welcome Deepak you have successfully logged in.
# vi /etc/ssh/sshd_config
# Add a line 129
Banner /etc/issue
Restart the ssh services
# service sshd restart
Stopping sshd: [ OK ]
Starting sshd: [ OK ]
Try to ssh your machine from a client machine
Stopping sshd: [ OK ]
Starting sshd: [ OK ]
Try to ssh your machine from a client machine
# ssh 10.10.10.19
This node contains Oracle Database 11gR2 and the owner of this node is Deepak.
root@10.10.10.19's password:
Last login: Sun Aug 5 15:13:05 2012 from 10.10.10.30
Welcome Deepak you have successfully logged in.