First, to achieve power through the rc.local file from the start
1: write test scripts
[root@host1 ~]#
vim test.sh
#!/bin/bash
/bin/echo $(/bin/date +%F_%T) >> /tmp/test.log
## start-up time to print the current output test.log texts
2: After the completion of the test script, change the configuration file rc.local
[root@host1 ~]#
vim /etc/rc.d/rc.local
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local
/ bin / /tmp/test.sh the bash> / dev / null 2> / dev / null ## together with this section configuration, let PXE
保存退出
3：在centos7中，/etc/rc.d/rc.local没有执行权限，需要授权，然后就可以重启机器验证就行了
[root@host1 ~]#
chmod +x /etc/rc.d/rc.local
4：重启之后查看结果
[root@host1 ~]#
cat /tmp/test.log
2019-06-02_16:44:53
二、通过chkcongfig开机启动服务来实现
1：在/etc/init.d/编辑一个测试脚本
[root@host1 ~]#
vim /etc/init.d/test
#!/bin/bash
# chkconfig: 3 88 88
/bin/bash /tmp/test.sh >/dev/null 2>/dev/null
保存退出
2：赋予执行权限
[root@host1 ~]#
chmod 755 /etc/init.d/test
3：加入开机启动服务列表
[root@host1 ~]#
chkconfig --add test
4：查看开机启动服务列表
[root@host1 ~]#
chkconfig --list
注：该输出结果只显示 SysV 服务，并不包含
原生 systemd 服务。SysV 配置数据
可能被原生 systemd 配置覆盖。
要列出 systemd 服务，请执行 'systemctl list-unit-files'。
查看在具体 target 启用的服务请执行
'systemctl list-dependencies [target]'。
netconsole 0:关 1:关 2:关 3:关 4:关 5:关 6:关
network 0:关 1:关 2:开 3:开 4:开 5:开 6:关
test 0:关 1:关 2:关 3:开 4:关 5:关 6:关
5：重启系统之后查看结果
[root@host1 ~]#
cat /tmp/test.log
2019-06-02_16:44:53
2019-06-02_16:48:45