Add Security Banners for Login Screen, Telnet, and FTP

Some organizations require their workstations to have security banners on their login screens and ftp/telnet login sessions. You'll have to ask your security personnel for their consent and monitoring verbiage.

Here's the example for the login screen.
#vi /etc/issue
YOUR NOTICE AND CONSENT BANNER GOES HERE
...
...
...
:wq! (saves and quits)

Here's the example for ftp
#vi /etc/default/ftpd
BANNER="YOUR NOTICE AND CONSENT BANNER GOES HERE"
:wq!

Here's the example for telnet
#vi /etc/default/telnetd
BANNER="YOUR NOTICE AND CONSENT BANNER GOES HERE"
:wq!