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解决 /etc/rc.local 开机启动问题

由于某些软件并没有增加开启启动的服务,很多时候需要手工添加,一般我们都是推荐添加命令到 /etc/rc.local 文件,但是 Debian9+/Ubuntu17+ 默认不带 /etc/rc.local 文件,而 rc.local 服务却还是自带的。

本教程以 Debian9 为例

rc.local 服务

root@debian:~# cat /lib/systemd/system/rc.local.service
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.

# This unit gets pulled automatically into multi-user.target by
# systemd-rc-local-generator if /etc/rc.local is executable.
[Unit]
Description=/etc/rc.local Compatibility
ConditionFileIsExecutable=/etc/rc.local
After=network.target

[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
RemainAfterExit=yes
GuessMainPID=no

查看状态(默认为关闭,但是有些还是开启了)

root@debian:~# systemctl status rc-local
● rc-local.service - /etc/rc.local Compatibility
Loaded: loaded (/lib/systemd/system/rc-local.service; static; vendor preset: enabled)
Drop-In: /lib/systemd/system/rc-local.service.d
└─debian.conf
Active: inactive (dead)

创建/etc/rc/local文件

cat <<EOF >/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
EOF

赋予执行权限

chmod +x /etc/rc.local

启动服务

systemctl start rc-local

查看状态

root@debian:~# systemctl status rc-local
● rc-local.service - /etc/rc.local Compatibility
Loaded: loaded (/etc/systemd/system/rc-local.service; static; vendor preset: enabled)
Drop-In: /lib/systemd/system/rc-local.service.d
└─debian.conf
Active: active (running) since Sat 2018-06-23 13:19:34 CST; 11min ago
Process: 326 ExecStart=/etc/rc.local start (code=exited, status=0/SUCCESS)
Tasks: 16 (limit: 4915)
CGroup: /system.slice/rc-local.service
├─ 740 barad_agent
├─ 746 barad_agent
├─ 747 barad_agent
├─ 774 /usr/local/qcloud/YunJing/YDEyes/YDService
├─ 793 /usr/local/qcloud/YunJing/YDLive/YDLive
└─1167 /usr/local/qcloud/stargate/sgagent -d

Jun 23 13:19:33 VM-50-229-debian rc.local[326]: Created symlink /etc/systemd/system/multi-user.tar
Jun 23 13:19:34 VM-50-229-debian systemd[1]: Started /etc/rc.local Compatibility.