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Showing posts with label configuration files. Show all posts
Showing posts with label configuration files. Show all posts
Linux Configuration Files
February 27, 2012
This is a growing list of websites that collect Linux based configuration files. The files are contributed by its visitors and are divided into different sections namely
Change the system login banner in Linux
October 01, 2005 0 comments
Login banner is the message that you see just above the login prompt in the console. You can change the login banner in Linux by editing the
The
Open
... the following code (which is the message you want to show on top of the login prompt).
Save and quit the file. That is it. Now each time you reboot, you will get your message shown on the login console.
The login task is managed by a daemon called
\d - Insert current day (local time)
\l - Insert line on which mingetty is running
\m - Machine architecture (uname -m)
\n - Machine's network node hostname (uname -n)
\o - Domain name
\r - Operating system release (uname -r)
\t - Insert current time (local time)
\s - Operating system name
\U - The number of users currently logged in.
\v - Operating system version.
/etc/issue file.The
/etc/issue is a text file which contains a message or system identification to be printed before the login prompt.Regenerate the login message each time the system reboots
Open
/etc/rc.local file and insert just above the line ...#File: /etc/rc.local ... touch /var/lock/subsys/local
... the following code (which is the message you want to show on top of the login prompt).
echo "Welcome to \n" > /etc/issue echo "All access to this system is monitored" >> /etc/issue echo "Unauthorized access is prohibited" >> /etc/issue echo >> /etc/issue echo "Last reboot completed at $(/bin/date)" >> /etc/issue
Save and quit the file. That is it. Now each time you reboot, you will get your message shown on the login console.
Explanation
The login task is managed by a daemon called
mingetty. Each time the you logout or reboot your machine, mingetty reads the message in the file /etc/issue and displays it just above the login prompt in the console. In the above example, mingetty expands the character '\n' to your machine's hostname.Escape sequences you can use in your /etc/issue file
mingetty recognizes the following escape sequences which might be embedded in the /etc/issue file:\d - Insert current day (local time)
\l - Insert line on which mingetty is running
\m - Machine architecture (uname -m)
\n - Machine's network node hostname (uname -n)
\o - Domain name
\r - Operating system release (uname -r)
\t - Insert current time (local time)
\s - Operating system name
\U - The number of users currently logged in.
\v - Operating system version.
If you have booted directly into GUI mode,
you can press Ctrl + Alt + F1 to view your virtual console.
