master 发布的文章

本文同样适用于 Debian 10 Buster 和 Debian 9 Strech。

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,一般我们都是推荐使用 systemd 写个系统服务,但是对于一些简单的脚本或者懒人来说,添加命令到 /etc/rc.local 文件更方便,但是自从 Debian 9 开始,Debian 默认不带 /etc/rc.local 文件,而 rc.local 服务却还是自带的:

root@debian ~ # cat /lib/systemd/system/rc-local.service
#  SPDX-License-Identifier: LGPL-2.1-or-later
#  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 by
# systemd-rc-local-generator if /etc/rc.local is executable.
Description=/etc/rc.local Compatibility

ExecStart=/etc/rc.local start


root@debian ~ # systemctl status rc-local
● rc-local.service - /etc/rc.local Compatibility
     Loaded: loaded (/lib/systemd/system/rc-local.service; static)
    Drop-In: /usr/lib/systemd/system/rc-local.service.d
     Active: inactive (dead)
       Docs: man:systemd-rc-local-generator(8)

为了解决这个问题,我们需要手工添加一个 /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


chmod +x /etc/rc.local

接着启动 rc-local 服务:

systemctl enable --now rc-local


The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled using systemctl.
Possible reasons for having this kind of units are:
• A unit may be statically enabled by being symlinked from another unit's
  .wants/ or .requires/ directory.
• A unit's purpose may be to act as a helper for some other unit which has
  a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
  D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
  instance name specified.

无视警告,因为这个服务没有任何依赖的系统服务,只是开机启动 /etc/rc.local 脚本而已。


root@debian ~ # systemctl status rc-local.service 
● rc-local.service - /etc/rc.local Compatibility
     Loaded: loaded (/lib/systemd/system/rc-local.service; enabled-runtime; vendor preset: enabled)
    Drop-In: /usr/lib/systemd/system/rc-local.service.d
     Active: active (exited) since Thu 2022-01-27 18:52:43 UTC; 10s ago
       Docs: man:systemd-rc-local-generator(8)
    Process: 541 ExecStart=/etc/rc.local start (code=exited, status=0/SUCCESS)
        CPU: 3ms

Jan 27 18:52:43 debian systemd[1]: Starting /etc/rc.local Compatibility...
Jan 27 18:52:43 debian systemd[1]: Started /etc/rc.local Compatibility.

然后你就可以把需要开机启动的命令添加到 /etc/rc.local 文件,丢在 exit 0 前面即可,并尝试重启以后试试是否生效了。


set cl=$(ClCompilerPath)
set file=config.h
echo %cl%
for /f "skip=1 tokens=2 delims==" %%i in ('wmic datafile where "name='%cl:\=\\%'" get version /format:list') do for /f "delims=*" %%v in ("%%i") do set "version=%%v"
echo %version%

set cmd=git rev-parse --short head
for /f "delims=*" %%i in ('%cmd%') do set commit=%%i
echo %commit%