linux prompt

1. 設置檔
   
   • 全users
     /etc/profile or /etc/bashrc
     
   • 個別user
     ~/.bash_profile , ~/.bash_login , ~/.profile , ~/.bashrc or ~/.bash_logout
2. 客製化prompt
   PS1='[\u@\h \w] \$ # ' #即為user@host ~
   
   PS1="\e[\u@\h \w]$ \e]" #即為[user@host ~]
   加框'[', ']'，由於是key words所以要加\e
   而0;32m 是指顏色，其他以此類推應該就看的出來了
   
3. 加上顏色
   PS1="\e[0;32m[\u@\h \w]\e]$ \e[m]" #即為[user@host ~]
   
4. 啟使
   source .bashrc
   or
   . .bashrc
5. Changing foreground and background bash prompt colors
   
   Syntax for changing colors in the bash is as follows:
   

   \033[ -> Indicates the beginning of color in the text
    x;yzm - Indicates color code
    \033[00m - Indicates the end of color in the text  

截錄常用的字元代表意思

Bash special character	Bash special character explanation	Bash special character	Bash special character explanation
\]	end a sequence of non-printing characters	\[	begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt
\h	the hostname up to the first `.'	\H	the hostname
\s	the name of the shell, the basename of $0 (the portion following the final slash)	\l	the basename of the shell's terminal device name
\$	if the effective UID is 0, a #, otherwise a $	\u	the username of the current user
\w	the current working directory	\W	the basename of the current working directory
\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

個人配置檔

#prompt
if [ $TERM = 'xterm' ]
then
        PS1='\e[0;32m[\[\033[02;32m\]\u@\h\[\033[01;34m\] \w\e[0;32m]\$\e[m '
else
        PS1='[\u@\h \w] \$ # '
fi

# colorful man page 
export PAGER="`which less` -s"
export BROWSER="$PAGER"
export LESS_TERMCAP_mb=$'\E[01;36m'
export LESS_TERMCAP_md=$'\E[01;36m'
export LESS_TERMCAP_me=$'\E[0m'
export LESS_TERMCAP_se=$'\E[0m'
export LESS_TERMCAP_so=$'\E[01;44;33m'
export LESS_TERMCAP_ue=$'\E[0m'
export LESS_TERMCAP_us=$'\E[01;33m'

References

Bash prompt basics