假设你要执行路径在 /usr/my下
　
　　 export PATH=/usr/my:$PATH # .bashrc # User specic aliases and functions alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' # Source global definitions [ -f /etc/bashrc ]; then . /etc/bashrc fi export PATH=/usr/my:$PATH



　
　　保存退出！
　
　　[root@stroller root]# source .bashrc
　
　　完整例子:
　
　　[root@stroller root]# vi .bashrc
　
　　 # .bashrc # User specic aliases and functions alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' # Source global definitions [ -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 .bashrc 内容为:
　
　　 # .bashrc # User specic aliases and functions alias rm='rm -i' alias cp='cp -i' alias mv='mv -i' # Source global definitions [ -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