A little Linux-about the/etc/issue file and custom logon prompt every day

The man manual describes the/etc/issue file as follows:

The file/etc/issue is a text file which contains a message or system identification to be printed before the login prompt. it may contain various @ char and \ char sequences, if supported by Getty.

As mentioned above, modifying the/etc/issue file can be used to modify the logon prompt. Modify and save the file, restart, and restart the file,Press the combination keyCTRL + ALT + F1 enter the terminal mode, and you will see the modified prompt.

/Etc/issue-escape code

The issue-file (/etc/issue or the file set with the-F option) may contain in certain escape codes to display the system name, date and time etc. all escape codes consist of a backslash (\) immediately followed by one of the letters explained below.

\ B: Insert the baudrate of the current line.

\ D: Insert the current date.

\ S: Insert the system name, the name of the operating system.

\ L: Insert the name of the current tty line.

\ M: Insert the architecture identifier of the machine, eg. iworkflow

\ N: Insert the nodename of the machine, also known as the hostname.

\ O: Insert the domainname of the machine.

\ R: Insert the release number of the OS, eg. 1.1.9.

\ T: Insert the current time.

\ U: Insert the number of current users logged in.

\ U: Insert the string "1 user" or "users" where is the number of current users logged in.

\ V: Insert the version of the OS, eg. the build-date etc.