shell学习之十八--nginx启动脚本（if）

迷南。 2022-06-05 01:14 463阅读 0赞

一、安装nginx  
http://blog.csdn.net/yujin2010good/article/details/51637912  
  
二、编写脚本（使用if编写nginx启动脚本）  
1、编写初步脚本  
\[root@node01 day7\]\# vi nginx\_stat.sh   
\#!/bin/sh  
. /etc/init.d/functions  
if \[ $\# -ne 1 \]  
   then  
      echo "USAGE $() \{start|stop|restart\}"  
      exit 1  
fi  
  
  
if \[ "$1" == "start" \]  
   then   
      action "start nginx" /bin/true  
elif \[ "$1" == "stop" \]  
   then  
      action "stop nginx" /bin/true  
elif \[ "$1" == "restart" \]  
   then  
      action "restart nginx" /bin/true  
else  
      echo "USAGE $() \{start|stop|restart\}"  
      exit 1  
fi  
\[root@node01 day7\]\# sh nginx\_stat.sh start  
start nginx                                                \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_stat.sh stop  
stop nginx                                                 \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_stat.sh start  
start nginx                                                \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_stat.sh  
USAGE  \{start|stop|restart\}  
\[root@node01 day7\]\#  
  
2、优化脚本（代入函数）  
\#!/bin/sh  
. /etc/init.d/functions  
USAGE()\{  
     echo "USAGE $() \{start|stop|restart\}"  
     exit 1  
\}  
if \[ $\# -ne 1 \]  
   then  
      USAGE  
fi  
  
  
if \[ "$1" == "start" \]  
   then   
      action "start nginx" /bin/true  
elif \[ "$1" == "stop" \]  
   then  
      action "stop nginx" /bin/true  
elif \[ "$1" == "restart" \]  
   then  
      action "restart nginx" /bin/true  
else  
    USAGE  
fi  
\[root@node01 day7\]\# sh nginx\_stat02.sh   
USAGE  \{start|stop|restart\}  
\[root@node01 day7\]\# sh nginx\_stat02.sh start  
start nginx                                                \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_stat02.sh stop  
stop nginx                                                 \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_stat02.sh restart  
restart nginx                \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_stat02.sh restart fd kjk 121  
USAGE  \{start|stop|restart\}  
  
3、加入真正操作  
\#!/bin/sh  
. /etc/init.d/functions  
start\_nginx=/soft/nginx-1.8.1/objs/nginx  
USAGE()\{  
     echo "USAGE $() \{start|stop|restart\}"  
     exit 1  
\}  
if \[ $\# -ne 1 \]  
   then  
      USAGE  
fi  
  
  
if \[ "$1" == "start" \]  
   then  
      $start\_nginx     
      action "start nginx" /bin/true  
elif \[ "$1" == "stop" \]  
   then  
      killall nginx  
      action "stop nginx" /bin/true  
elif \[ "$1" == "restart" \]  
   then  
      pkill nginx  
      sleep 2  
      $start\_nginx    
      action "restart nginx" /bin/true  
else  
    USAGE  
fi  
\[root@node01 day7\]\# sh nginx\_start03.sh start  
start nginx                                                \[  OK  \]  
\[root@node01 day7\]\# ps -ef |grep nginx  
root      73948      1  0 23:33 ?        00:00:00 nginx: master process /soft/nginx-1.8.1/objs/nginx  
nginx     73950  73948  0 23:33 ?        00:00:00 nginx: worker process         
root      73952  56270  0 23:33 pts/4    00:00:00 grep nginx  
\[root@node01 day7\]\# sh nginx\_start03.sh restart  
restart nginx                                              \[  OK  \]  
\[root@node01 day7\]\# sh nginx\_start03.sh stop  
stop nginx                                                 \[  OK  \]  
\[root@node01 day7\]\# ps -ef |grep nginx        
root      74026  56270  0 23:34 pts/4    00:00:00 grep nginx  
\[root@node01 day7\]\# ps -ef |grep nginx  
root      74028  56270  0 23:34 pts/4    00:00:00 grep nginx