man手冊對/etc/issue文件的描述是：
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.
如上所述，修改/etc/issue文件可以達到修改登錄提示語的作用。修改並保存該文件之後，重啓，重啓完成之後，按組合鍵Ctrl+Alt+F1進入終端模式，你就可以看到修改之後的提示語了。
/etc/issue - escape code
The issue-file (/etc/issue or the file set with the -f option) may contain 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.插入當前行的波特率
\d : Insert the current date. 插入當前的日期
\s : Insert the system name, the name of the operating system. 插入操作系統的名字
\l : Insert the name of the current tty line. 插入當前tty的線路
\m : Insert the architecture identifier of the machine, eg. i486 插入硬件信息
\n : Insert the nodename of the machine, also known as the hostname. 插入主機名
\o : Insert the domainname of the machine. 插入本機域名
\r : Insert the release number of the OS, eg. 1.1.9. 插入操作系統版本
\t : Insert the current time. 當前時間
\u : Insert the number of current users logged in. 登陸用戶的數量
\U : Insert the string "1 user" or " users" where is the number of current users logged in.插入“1用戶”或“用戶”，其中的當前用戶登錄的數字
\v : Insert the version of the OS, eg. the build-date etc.插入版本的操作系統，如生成日期等