bash shell configuration

1 In general

ANSI/VT100 转义序列可用于各种编程语言
e
33
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]$(git_branch)[33[00m] [e[01;32m]$ [33[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