Welcome Speech for Linux system Logon

There are two configuration files, issue and issue.net, In the welcome speech/etc folder for text devices to log on to the system. Issue is local. Needless to say, issue.net must be remote! The two files allow the use of the escape sequence (escape sequence). When the system encounters an escape sequence, it will automatically replace it with the corresponding information, for example, \ n represents the host name. The complete transfer sequence list is as follows (This list is taken from: man agetty, because this issue is explained by agetty): B Insert the baudrate of the current line. d Insert the current date. the current date on the local end is s Insert the system name, the name of the operating system. operating system name l Insert the name of the current tty line. displays the interfaces m Insert the architecture identifier of the machine, eg. i486. display the hardware level (i386/i38/ i586/i686 ....) n Insert the nodename of the machine, also known as the h Ostname. displays the host's network name o Insert the NIS domainname of the machine. display domain nameO Insert the DNS domainname of the machine. r Insert the release number of the OS, eg. 1.1.9. release version of the operating system (similar to uname-r) t Insert the current time. local end current time u Insert the number of current users logged in. number of logged-on users U Insert the string "1 user" or "<n> users" where <n> is the number of current users logged in. v Insert the version o F the OS, eg. the build-date etc. in CentOS of the operating system version, the content of the two files is the same, as shown below: Welcome Speech After CentOS release 6.1 (Final) Kernel \ r on an \ m system logon is successful: /etc/motd, "motd" is the abbreviation Of "Message Of ToDay", which is usually empty. * In CentOS 6.4, the motd file does not seem to support escape sequences. We can configure this file to say "Hello, welcome back!" to the current user after the user logs on successfully !", You can also warn the "bad guy" who is not doing anything about the system ". By configuring these two texts, you can customize the personalized information for Logon. If you combine them with your own scripts, You can dynamically display more content, such as time reminders and system announcements, that's even more interesting!