2 minutes-implementation of the boot-up nginx boot script (Shell article)

How to quickly write a startup script , mainly through the following several

1, logical smoothing

• can be in TXT file, have pseudo code way, form system, List order, then add code in a little bit

• Determine if the program is running through the PID process file

• Set 3 modules (on, off, Reload)

• Then use the case statement to invoke the 3 module to implement the startup script function

• Restart See the process number changes, reload see if the configuration file is in effect

2, Script body content

[[email protected]]# cat /etc/init.d/nginx#!/bin/bash# chkconfig: 2345 32  62   #按照开机启动模板设定, 32 serial number  62 system level # description: activates/deactivates all  network interfaces configured to  [ -f /etc/init.d/functions ]  &&  . /etc/init.d/functions   #引用系统函数库nginx =/application/nginx/sbin/ Nginxpidfile=/application/nginx/logs/nginx.pidoldboy () {    retval=$?     if [  $RETVAL  -eq 0 ];then      action  "Nginx  is $1 " /bin/true    else      action " Nginx is $1 " /bin/false    fi}# #no .1  definition Startup module start () {  if  [ -f  $Pidfile  ];then    echo  "nginx is running"     else    $nginx     oldboy started  fi     return $ retval}# #no .2  definition Shutdown module stop () {  if [ ! -f  $Pidfile  ];then     echo  "Nginx in not running"     else      $nginx  -s stop    oldboy stoped  fi}# #no .3  Define reload Module reload () {  if [ ! -f  $Pidfile  ];then    echo   "Cat ' t open  $Pidfile  ,no such file or directory"   else      $nginx  -s reload    oldboy reloaed    fi} case  "$"  in    start)     Start;;     stop)     Stop;;     reload)     Reload;;     restart)   &NBsp; stop    sleep 2    start;;     *)     echo  "usage: sh $0 {start|stop|reload| restart}  "       exit 1esacexit    $RETVAL

3, put the script under the/etc/init.d/.

3.1 Viewing the service self-launch list

[[email protected] init.d]# chkconfig--list|grep nginx[[email protected] init.d]# chkconfig--list|grep mysqlmysqld 0: Off 1: Off 2: Enable 3: Enable 4: Enable 5: Enable 6: Off

3.2 Writing scripts to/ETC/INIT.D

[Email protected] init.d]# Cd/etc/init.d/[[email protected] init.d]# VI nginx #内容见上面脚本

3.3 Authorization Script x Execute permissions

[[email protected] init.d]# chmod +x nginx [[email protected] init.d]# ll nginx-rwxr-xr-x 1 root root 1177 September 15:45 n Ginx

4. Add Boot from boot

[[email protected] init.d]# chkconfig nginx onservice Nginx does not support Chkconfig # #报错, no Nginx file added to boot from boot [email Protected] rc3.d]# chkconfig--list|grep nginxnginx 0: Off 1: Off 2: Enable 3: Enable 4: Enable 5: Enable 6: Off

4.1 Testing

[Email protected] rc3.d]#/etc/init.d/nginx Startnginx is running

Another, boot-start method, you can put the boot content in the /etc/rc.local file, mainly to use absolute path

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This article is from the "funny Brother Notes" blog, be sure to keep this source http://qiuyt.blog.51cto.com/1229789/1968880

2 minutes-implementation of the boot-up nginx boot script (Shell article)