Linux命令之insserv
2015-02-10 tech linux linux-command 5 mins 2052 字
之前在卸载pureftp时候，使用了update-rc.d pureftpd remove，收到了这样一个提醒：update-rc.d: using dependency based boot sequencing
网上搜索了一番原来Debian已经使用了insserv来代替update-rc.d。
于是顺便记录一下Linux的开机启动管理。
linux下，services的启动、停止等通常是通过/etc/init.d的目录下的脚本来控制的。要添加一个自动启动的服务，先将启动脚本放在/etc/init.d，然后使用insserv来启用这个服务，例如：
insserv myserver #添加服务
insserv -r myserver #删除服务
insserv -d myserver #使用默认的runlevels
启动脚本里边要定义启动文件的metadata，参考pptpd脚本中的INIT INFO
1 #!/bin/sh
2 ### BEGIN INIT INFO
3 # Provides: pptpd
4 # Required-Start: $remote_fs $syslog
5 # Required-Stop: $remote_fs $syslog
6 # Default-Start: 2 3 4 5
7 # Default-Stop: 0 1 6
8 ### END INIT INFO
9 # Copyright Rene Mayrhofer, Gibraltar, 1999
10 # This script is distibuted under the GPL
11
12 PATH=/bin:/usr/bin:/sbin:/usr/sbin
13 DAEMON=/usr/sbin/pptpd
14 PIDFILE=/var/run/pptpd.pid
15 FLAGS="defaults 50"
16
17 case "$1" in
18 start)
19 echo -n "Starting PPTP Daemon: "
20 start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON \
21 ▸ -- < /dev/null > /dev/null
22 echo "pptpd."
23 ;;
24 stop)
25 echo -n "Stopping PPTP: "
26 start-stop-daemon --stop --quiet --pidfile $PIDFILE --exec $DAEMON
27 echo "pptpd."
28 ;;
29 force-reload|restart)
insserv的命令格式如下：
insserv [<options>] [init_script|init_directory]
Available options:
-h, --help This help.
-r, --remove Remove the listed scripts from all runlevels.
-f, --force Ignore if a required service is missed.
-v, --verbose Provide information on what is being done.
-p <path>, --path <path> Path to replace /etc/init.d.
-o <path>, --override <path> Path to replace /etc/insserv/overrides.
-c <config>, --config <config> Path to config file.
-n, --dryrun Do not change the system, only talk about it.
-d, --default Use default runlevels a defined in the scripts
卸载pureftp的过程：
- service pureftpd stop
- rm -rf /home/wwwroot/ftp/
- rm -rf /usr/local/pureftpd/
- insserv -r pureftpd
- rm -f /etc/init.d/pureftpd
- 再删除ftpuser数据库