How change what’s displayed before login to shell or after
Before login The text displayed before the login prompt is stored in /etc/issue After login The text displayed after login is stored in /etc/motd, It's just a normal text file, but it accepts many of escape sequences: \b -- Baudrate of the current line. \d -- Current date. \s -- System name, the name of the operating system. \l -- Name of the current tty line. \m -- Architecture identifier of the machine, eg. i486 \n -- Nodename of the machine, also known as the hostname. \o -- Domainname of the machine. \r -- Release number of the OS, eg. 1.1.9. \t -- Current time. \u -- Number of current users logged in. \U -- The string "1 user" or " users" where is the number of current users logged in. \v -- Version of the OS, eg. the build-date etc.