最後更新: 2022-09-21

.bashrc 與 .profile 的分別

.bashrc is a shell script that Bash runs whenever it is started interactively.

.bashrc = bash config file

Bypass .bashrc

--norc    # Do not execute initialization file ( /etc/bash.bashrc & ~/.bashrc)

 * This option is on by default if the shell is invoked as sh

.bash_profile and .profile which are only run at the start of a new login shell. (bash -l)

Bypass profile

--noprofile

Do not read either the system-wide startup file /etc/profile

any of the personal initialization files ~/.bash_profile, ~/.bash_login, or ~/.profile

載入次序

1. /etc/profile
   /etc/bashrc
2. $HOME/.bash_profile
3. $HOME/.bash_login         # 未必有
4. $HOME/.profile               # 未必有

$HOME/.bash_profile

# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

Bash shell is started as a login-shell ?

shopt login_shell

login_shell     on

提醒自己是 root (加上了綠色)

在 /root/.bashrc 加上

export PS1='\[\e[32m\]\h:\W\$\[\e[m\]'

• \u – Username
• \h – Hostname (first part)
• \w – Full path of the current working directory
• \W - last part of the current working directory

以免 Del 錯東西

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

Centos 7 的 bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs
PATH=$PATH:$HOME/bin

export PATH

Global Example

# profile for user httpd

/etc/profile.d/httpd.sh

pathmunge /opt/httpd/bin