Ubuntu添加开机启动脚本

新建一个shell脚本，内容如下

#!/bin/bash

### BEGIN INIT INFO
# Provides:  protected_shell
# Required-Start:  $local_fs $remote_fs $network $syslog $named
# Required-Stop:  $local_fs $remote_fs $network $syslog $named
# Default-Start: 2 3 4 5
# Default-Stop:  0 1 6
# Short-Description: protect the gdwy_device_server
### END INIT INFO

# chkconfig: - 60 50
# description: service demo script
# processname: service_demo

# Source function library.
#./etc/init.d/functions

# Source networking configuration.
#./etc/sysconfig/network

# Check that networking is up.
#[ ${NETWORKING}="no" ] && exit 0

#进程名字可修改
PRO_NAME=/home/liurui/test1/build-test1-64bit-Debug/test1
CMD="$PRO_NAME "
#exec permission
[ -x $PRO_NAME ] || exit 0


while true ; do
     #用ps获取$PRO_NAME进程数量
     NUM=`ps aux | grep -w ${PRO_NAME} | grep -v grep |wc -l`
     echo $NUM
     #少于1，重启进程
     if [ "${NUM}" -lt "1" ];then
         echo "${PRO_NAME} was killed"
         $CMD
    #大于1，杀掉所有进程，重启
    elif [ "${NUM}" -gt "1" ];then
        echo "more than 1 ${PRO_NAME},killall ${PRO_NAME}"
        killall -9  $PRO_NAME
        $CMD
     fi
     #kill僵尸进程
     NUM_STAT=`ps aux | grep -w ${PRO_NAME} | grep T | grep -v grep | wc -l`
     if [ "${NUM_STAT}" -gt "0" ];then
         killall -9 ${PRO_NAME}
         echo "zombie was killed"
         $CMD
    fi
     sleep 5s
done
echo "shell was killed"
exit 0

如果不添加前面的启动信息（BEGIN INIT INFO）会报错,如下：

insserv: warning: script 'protected_shell' missing LSB tags and overrides

insserv: There is a loop between service watchdog and protected_shell if stopped

insserv:  loop involving service protected_shell at depth 2
insserv:  loop involving service watchdog at depth 1

insserv: Stopping protected_shell depends on watchdog and therefore on system facility `$all' which can not be true!

insserv: exiting now without changing boot order!

update-rc.d: error: insserv rejected the script header

主要是因为脚本的启动顺序和其它服务冲突导致，同时没有配置脚本启动的级别
赋予执行权限

chmod +x test.sh

sudo mv test.sh /etc/init.d/

添加开机启动

sudo update-rc.d test.sh defaults

取消开机启动

sudo update-rc.d -f test.sh remove