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2014-10-17 shell脚本练习题

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第四期的兄弟姐妹一共有50来个，可学的出类拔萃的就那么几个，这个是个永恒不变的定理，就跟咱们上学的时候一样，一个班里不可能个个都是尖子生，除非是特训班。其实，我非常想把大家都培养成尖子生。但事实上，那是一个巨大的工程，甚至比中个百万大奖都难！ 但，我会竭尽全力尽为大家铺好路，在成功的路上，一路为你保驾护航！

今日shell练习： 假如你服务器上跑的是httpd，那请写一个监控脚本，每分钟检查一次httpd进程是否存在，若是发现不在了，那么就启动它。（写脚本很简单，明白了思路，然后就是动手去写，先实现需求，等需求实现了，再去补充更好的功能，比如输出漂亮的日志、漂亮的格式、更完善的逻辑）
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2014-10-17 09:23 举报

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    0

    游夜

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    本帖最后由 游夜 于 2014-10-17 10:14 编辑

    先把基本的写出来。出差在外，时间不好分配
    #!/bin/bash
    #shell name check_httpd.sh
    #shell dir /usr/local/src/check_httpd.sh
    service=`netstat -lnp |grep httpd|awk -F '/' '{print $2}'`
    if [ "$service" != "httpd" ]
    then
    {
    /usr/local/apache2/bin/apachectl start
    echo "httpd start!"
    }
    fi
    加入任务计划,每分钟执行一次
    crontab -e
    */1 * * * * root ./temp.sh


    2014-10-17 10:06 分享
    0

    齐天大圣

    赞同来自:

    本帖最后由 齐天大圣 于 2014-10-17 10:21 编辑
    1. #!/bin/bash
    2. while :;
    3. do
    4.   [ -z `ps aux |grep httpd |grep -v httpd|awk '{print $11}'|sort -u`] && /usr/local/apache2/bin/apachectl start && echo "`date +%F%T` httpd is down and already start!plz check error_log." |mail -s httpd xxx@xxx.com
    5.   sleep 60
    6. done
    2014-10-17 10:19 分享
    0

    coffee

    赞同来自:

    1. #!/bin/bash
    2. #This is httpd daemon script

    4. while true
    5. do
    6.         web=`pgrep httpd | wc -l`
    7.         if [ $web -eq 0 ];then
    8.                 /usr/local/apache2/bin/apachectl start
    9.         fi

    11. done

    13. 计划任务
    14. crontab -e
    15. * * * * * /root/web.sh



    2014-10-17 10:50 分享
    0

    小雨

    赞同来自:

    本帖最后由 小雨 于 2014-10-17 10:55 编辑

    2. #!/bin/bash


    5. while :; do
    6.         a=`netstat -lnp |grep httpd`
    7.         if [ -z $a ]; then
    8.                 echo "sercice has stop"
    9.                 /usr/local/apache2/bin/apachectl start
    10.         else
    11.                 echo "service is running"
    12.         fi
    13.       
    14.         sleep 60
    15. done        



    2014-10-17 10:52 分享
    0

    soar

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    本帖最后由 soar 于 2014-10-17 10:59 编辑

    #!/bin/bash
    #test system's httpd services
    echo "Now ,the  httpd service will  to be detcted...";
    httpd=`/usr/bin/pgrep httpd`
    if [ "$httpd" != "" ]
    then
            echo "The httpd service is running"
    else
            echo "The httpd service is not running,now start to run it"
            /usr/local/apache2/bin/apachectl start
    fi

    然后放到任务计划，每分钟执行一次即可
    2014-10-17 10:57 分享
    0

    ocean

    赞同来自:

    1. # cat 1017.sh
    2. #!/bin/bash
    3. # Desc : this script is to check HTTP services Healthy,if not then restart.
    4. # Writen by Jeffery.Su
    5. # Date:  Oct,17 2014

    7. PRO_NUM=`ps -A | grep httpd|wc -l`
    8. DATE=`date +"%Y-%m-%d %H:%M"`
    9. LOG_PATH=/tmp/httpd_check/`date +%Y%m`
    10. LOG_FILE=$LOG_PATH/httpd_check_`date +%d`.log

    12. [ -d $LOG_PATH ] || mkdir -p $LOG_PATH

    14. if [ $PRO_NUM -eq 0 ];then
    15.      /usr/local/apache2/bin/apachectl start
    16.      echo `date +'%Y/%m/%d %H:%M'` httpd err >> $LOG_FILE
    17. else
    18.      echo `date +'%Y/%m/%d %H:%M'` httpd ok >> $LOG_FILE
    19. fi


    22. echo "*/1 * * * *  /bin/bash /usr/local/bin/1017.sh" >>/var/spool/cron/root
    2014-10-17 11:41 分享
    0

    jaws1689

    赞同来自:

    1. #!/bin/bash
    2. #20141017_practice

    4. while :
    5.   do
    6.    server=`netstat -lnp | grep httpd | awk -F/ '{print $2}'`
    7.    if [ -z $server ]
    8.      then
    9.       /usr/local/apache2/bin/apachectl restart
    10.      else
    11.        sleep 60
    12.    fi
    13. done
    2014-10-17 11:45 分享
    0

    chenzudao1234

    赞同来自:

    #!/bin/bash
    while true
    do
       ps aux | grep httpd>1.txt
       a=`cat 1.txt | wc -l`
       if [ $a -eq 1 ]
        then
           /usr/local/apache/bin/httpdctl graceful
       fi

       sleep 60
    done
    2014-10-17 11:51 分享
    0

    So Long

    赞同来自:

    本帖最后由 程城 于 2014-10-17 19:48 编辑

    2. #/bin/bash
    3. #This  shell scripts  is  to  check the apache service run or  down. If apache is down  turn is run.

    5. while : ;  do

    7. if_run=`ps  aux |grep  httpd |awk '{print $7}'|sed  's#^.*/##g'`
    8. if [ $if_run   -ne  "httpd"  ] ;then
    9.        service  httpd start        
    10. else
    11.        echo "apache service have been run ago !"

    13. fi
    14.    sleep   60
    15. done
    谢谢提醒，我太粗心了。
    2014-10-17 12:08 分享
    0

    陈沛

    赞同来自:

    1. #!/bin/bash
    2. # 2014-10-17
    3. # chenpei
    4. # If the httpd start

    6. while :;
    7. do
    8.     if [ -z "`netstat -lnp | grep httpd`" ]; then
    9.         /usr/local/apache2/bin/apachectl start
    10.         echo "start httpd service."
    11.     fi
    12.     sleep 60
    13. done
    2014-10-17 14:54 分享
    0

    coffee

    赞同来自:

    本帖最后由 coffee 于 2014-10-17 16:05 编辑
    程城 发表于 2014-10-17 12:08

    程城你的while循环  少了  do
    2014-10-17 15:54 分享
    0

    zyfeifie

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    本帖最后由 zyfeifie 于 2014-10-17 18:33 编辑
    1. #!/bin/bash
    2. time=`date +%F-%H:%M:%S`
    3. while : ;
    4. do
    5. num=`ps -ef | grep httpd| grep -v 'grep' | wc -l`
    6. if [ $num -eq 0 ]
    7. then
    8. echo $time >>/tmp/err.log
    9. /usr/local/apache2/bin/apachectl start >>/tmp/err.log
    10. fi
    11. sleep 60
    12. done
    2014-10-17 18:31 分享
    0

    Louis

    赞同来自:

    1. #!/bin/bash
    2. ## This script is for check if service httpd is on,if no,restart service.
    3. ## Written by Louis at 2014/10/17 19:06

    5. log=/tmp/httpdcheck.log
    6. while :; do
    7.     if ! ps aux|grep -v grep|grep -q httpd; then
    8.         echo "[`date +'%F %T'`]: httpd service is off" >> $log
    9.         /usr/local/apache2/bin/apachectl start &>> $log
    10.         if ! ps aux|grep -v grep|grep -q httpd; then
    11.             mail -s 'httpd start fialed.please check.' root@localhost < $log
    12.             exit
    13.         fi
    14.     fi
    15. sleep 60
    16. done


    思路：ps aux查看是否已有httpd进程，如果没有，记录时间，并启动httpd服务；启动后，再次判断，如果还启动不成功，发送邮件告警，人工查看启动失败原因，并且退出死循环。第一次判断httpd进程如果存在或者启动成功，均不记录信息。
    2014-10-17 19:29 分享
    0

    So Long

    赞同来自:

    coffee 发表于 2014-10-17 15:54
    程城你的while循环  少了  do

    谢谢提醒，{:4_94:}
    2014-10-17 19:51 分享
    0

    陌懒

    赞同来自:

    本帖最后由 陌懒 于 2014-10-20 17:00 编辑
    1. #!/bin/bash
    2. test=$(netstat -tuln|grep ":80")

    4. if [ "$test" == "" ];then
    5.       echo "ERROR_`date +%F_%T`      The httpd has down!">>/tmp/http.log
    6.       /usr/local/apache2/bin/apachectl start

    8. else
    9.      echo "CORRECT_`date +%F%T`    Httpd is running!">>/tmp/http.log
    10. fi

    12. 加入计划任务
    13. crontab -e
    14. * * * * * /root/checkhttpd.sh

    2014-10-20 16:49 分享
    0

    平弟

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    不会啊   感觉不太好
    2015-03-08 18:05 分享
    0

    sss

    赞同来自:

    1. #!/bin/bash
    2. #Checked every minute httpd process exists
    3. #If the discovery is gone, then start it
    4. #2015/05/12

    6. services=`netstat -nltp | grep httpd | awk -F '/' '{print $2}'`

    8. if [ "$services" != httpd ]
    9.         then
    10.         /usr/local/apache2/bin/apachectl start
    11.         echo "httpd start !"
    12. fi


    2015-05-21 16:27 分享
    0

    佳生-Jason

    赞同来自:

    #! /bin/bash
    ##
    ##

    log=/var/log/httpdcheck.log
    while :; do
        ​a=`ps aux |grep httpd |wc -l`
        if [ $a -eq 0 ]; then
            echo "[`date +'%F %T'`] httpd service is off.Try to start now" >>$log
            /usr/local/apache2/bin/apachectl start >> $log
        ​else
        ​    ​echo "httpd service is running."
        ​    ​exit
        ​fi   
        ​b=`netstat -lnp |grep httpd |wc -l`
        ​​if [ $b -eq 0 ]; then
            mail -s 'Htttpd service start fialed. Please check.' 1091322612@qq.com < $log
        ​    ​echo "[`date +'%F %T'`]httpd service start fialed. please check." >>$log
            exit
        else
        ​    ​echo "[`date +'%F %T'`] httpd service is started successfully." >>$log
        ​fi
        sleep 60
    done
    2015-07-28 17:04 分享
    0

    翟厚翔

    赞同来自:

    #!/bin/bash
    SERV=`ps -ef|grep 'httpd'|grep -v 'grep'|wc -l`
    if [ $SERV -eq 0 ];then
       service httpd start &> /dev/null
       sleep 10
       SERV1=`ps -ef|grep 'httpd'|grep -v 'grep'|wc -l`
        if [ $SERV1 -eq 0 ];then
             service httpd start 1>/dev/null 2>httpd_err.log
           else
             echo "httpd start is success"
        fi
    else
           echo "httpd is exits"
    fi
    2015-12-24 10:54 分享
    0

    prospect

    赞同来自:

    #!/bin/sh  while true do     web=`pgrep httpd |wc -l`     if [ $web -eq 0 ];then         /usr/local/apache2/bin/apachectl start     fi sleep 60 done
    2016-01-09 22:16 分享
    0

    simle

    赞同来自:

    1 #!/bin/bash
      2 #It's created by chaochao
      3 `ps aux |grep httpd > httpd.txt`
      4 grep '/usr/local/apache2/bin/httpd -k start' httpd.txt
      5 sign=`echo $?`
      6 if [ $sign == 0  ];then
      7 echo "httpd is running"
      8 else
      9 echo "It begins httpd.sh:!!!"
    10 echo "It begins httpd.sh:!!!"
    11 /usr/local/apache2/bin/apachectl start
    12 fi
    13 exit


    2016-01-10 00:02 分享
    0

    loveyouhyf

    赞同来自:

    #!/bin/bash
    while :;do
    if [  `pgrep 'httpd'|wc -l` -gt 1 ];then
    echo "your httpd service is ok!"
    sleep 60
    else
    for i in `pgrep 'httpd'`;do
    kill -9 $i
    done
    /usr/local/apache/bin/apachectl restart
    fi
    done
    2016-01-10 15:50 分享
    0

    大仔黑黑

    赞同来自:

    #!/bin/bash
    ##written by wangyl
    ##2016-03-22

    while :;
    do
            a=`netstat -lnp | grep "httpd"`
            if [ -z $a ];then
                    /etc/init.d/httpd start
                    echo "server httpd was done,please start httpd right now" >> /tmp/httpd.log
            fi
            #sleep 60
    done
    2016-03-22 10:07 分享
    0

    kevinjin

    赞同来自:

    1. #! /bin/bash
    2. if ps aux|grep httpd|grep -v grep|grep -q httpd
    3. then
    4.     echo "httpd is running"
    5. else
    6.     echo "httpd is not running, start it"
    7.     /usr/local/apache2/bin/apachectl start
    8. fi

    10. crontab -e
    11. */1 * * * * sh ps_httpd.sh
    2016-08-08 22:46 分享
    0

    大雁

    赞同来自:

    ps aux |grep httpd|grep -v grep >/dev/null
     if [ $? -eq 0 ]
     then
       echo "httpd is runing"
     else
       echo "httpd is downing,try run the httpd"
       /usr/local/apache2/bin/apachectl start >/dev/null
    fi

    2017-03-17 07:08 分享
    0

    王斌

    赞同来自:

    #! /bin/bash

    # Check service httpd is running or not, if not, start httpd.

    # auth : Cityzen Wang

    httpstat=`ps aux |grep httpd|grep -v "grep httpd"`

    if [ -n "$httpstat" ]

    then

        echo "httpd is running"

    else

        /usr/local/apache2/bin/apachectl start

    fi

    * * * * * /bin/sh /usr/local/sbin/2.sh

    2017-04-23 21:17 分享
    0

    杨银根

    赞同来自:

    #!/bin/bash

    h=`ps aux|grep httpd|wc -l`

    while :

    do

       if [ $h -le 1 ]

       then

          /etc/init.d/httpd start

       fi

       sleep 60

    done

    2017-06-19 10:58 分享
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