假设你要执行的程序路径在 /usr/my下

export PATH=/usr/my:$PATH

# .bashrc

# User specific aliases and functions

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

# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
export PATH=/usr/my:$PATH

保存退出！

[root@stroller root]# source .bashrc

完整例子：

[root@stroller root]# vi .bashrc

# .bashrc

# User specific aliases and functions

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

# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi

然后在 fi 后面加下面语句：

export PATH=/root:$PATH

加完后的 .bashrc 内容为：

# .bashrc

# User specific aliases and functions

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

# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi

export PATH=/root:$PATH

//在命令行下输入 source .bashrc 执行 .bashrc 生效.

[root@stroller root]# source .bashrc

//查看PATH值：

[root@stroller root]# echo $PATH

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