Linux下shell显示用户名和主机名 Linux下shell显示用户名和主机名

文章作者：Tyan
博客：noahsnail.com|CSDN|
1. 问题描述最近在服务器上重新安装了一点东西，结果登录的shell界面变成了显示-bash-4.2$，显得很丑而且使用起来十分不方便，主要是scp时需要用户名和主机名，因此对其进行了修改。
2. 解决方案修改当前用户的.bash_profile文件，在其中加入：

export PS1='[\u@\h \W]$ '

【Linux下shell显示用户名和主机名】source .bash_profile，OK，问题解决。
3. 解释 PS1是Linux终端用户的一个环境变量，用来说明命令行提示符的设置。\u等是特殊字符，可以通过man bash命令查看，其意义如下：

\aan ASCII bell character (07) \dthe date in "Weekday Month Date" format (e.g., "Tue May 26") \D{format} the format is passed to strftime(3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation.The braces are required \ean ASCII escape character (033) \hthe hostname up to the first `.' \Hthe hostname \jthe number of jobs currently managed by the shell \lthe basename of the shell's terminal device name \nnewline \rcarriage return \sthe name of the shell, the basename of $0 (the portion following the final slash) \tthe current time in 24-hour HH:MM:SS format \Tthe current time in 12-hour HH:MM:SS format \@the current time in 12-hour am/pm format \Athe current time in 24-hour HH:MM format \uthe username of the current user \vthe version of bash (e.g., 2.00) \Vthe release of bash, version + patch level (e.g., 2.00.0) \wthe current working directory, with $HOME abbreviated with a tilde (uses the value of the PROMPT_DIRTRIM variable) \Wthe basename of the current working directory, with $HOME abbreviated with a tilde \!the history number of this command \#the command number of this command \$if the effective UID is 0, a #, otherwise a $ \nnnthe character corresponding to the octal number nnn \\a backslash \[begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt \]end a sequence of non-printing characters

部分特殊字符解释如下：