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