bash shell configuration

1 In general

ANSI/VT100 转义序列可用于各种编程语言
\e
\033
\x1B
这3个命令都是设置颜色和类型的开始命令

2 Example

function git_branch {
branch="`git branch 2>/dev/null | grep "^\*" | sed -e "s/^\*\ //"`"
if [ "${branch}" != "" ];then
if [ "${branch}" = "(no branch)" ];then
branch="(`git rev-parse --short HEAD`...)"
fi
echo " ($branch)"
fi
}

var='\[\e[48;5;28m\][\!]\[\e[45m\]\u@\h\[\e[m\] \[\e[44m\]\w\[\e[m\] \\
\[\e[01;32m\]$(git_branch)\[\033[00m\] \[\e[01;32m\]\$ \[\033[00m\]'

export PS1=$var

The picture as follow:

3 Illustration

code	description
\e[48;5;28m	background color (resolution256) is green, foreground color is white(default)
]!]	history command line number
\e[45m	background color is pink
\u	username
\h	host machine name
\e[44m	background color is blue
\w	absolute path
\e[m	as a end used to end up the front color setting
[]	it is important to use to avoid PS1 is covered by command line, and correctly calculate autowrap
\e[01;32m	foreground text bold and color green
$ | root user is #, and other normal user is $
\e[00m	used to restore the default setting
\	used to change new line

4 Reference web link

bash color setting reference: https://blog.csdn.net/u010632165/article/details/92811856