ubuntu系统中/etc/rc.local和/etc/init.d/rc.local的区别

在Ubuntu系统中，为了使一个程序在开机时自动启动，通常可以通过修改rc.local文件来实现。然而，Ubuntu系统中有两个rc.local文件，它们是/etc/rc.local和/etc/init.d/rc.local。这两个文件之间的关系可以通过查看它们的内容来理解。

bash
/etc/init.d/rc.local
! /bin/sh
    BEGIN INIT INFO
# Provides:  rc.local
# Required-Start: $all
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop:
# Short-Description: Run /etc/rc.local if it exist
    END INIT INFO
PATH=/sbin:/usr/sbin:/bin:/usr/bin
. /lib/init/vars.sh
. /lib/lsb/init-functions
do_start() {
    if [ -x /etc/rc.local ]; then
        [ '$VERBOSE' != no ] \u0026\u0026 log_begin_msg 'Running local boot scripts (/etc/rc.local)'
        /etc/rc.local \u003e/dev/null 2\u003e\u00261 || exit $?
        [ '$VERBOSE' != no ] \u0026\u0026 log_end_msg $?
    fi
}
case '$1' in
    start) do_start ;;
    restart|reload|force-reload) echo 'Error: argument '$1' not supported' \u003e\u00262 exit 3 ;;
    stop) ;;
    ) echo 'Usage: $0 start|stop' \u003e\u00262 exit 3 ;;
esac

bash
/etc/rc.local
#!/bin/sh -e
   rc.local
   This script is executed at the end of each multiuser runlevel.
# Make sure that the script will 'exit 0' on success or any other
# value on error.
   In order to enable or disable this script just change the execution
# bits.
   By default this script does nothing.
exit 0

0 关机
1 单用户
2-5 多用户图形界面
6 重启