Shell之企业实际工作案例
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案例一:
监控web站点目录（/var/html/www）下所有文件是否被恶意篡改（文件内容被改了），如果有就打印改动的文件名（发邮件），定时任务每3分钟执行一次
监控脚本内容:
[[email protected] scripts]# cat web-file.sh #!/bin/bash ############################################################## # File Name: web-file.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018 # Description: ############################################################## Email='[email protected]' Find_file='find /tmp/ -type f' Dir='/opt/web_file.log' Old_file=(`cat $Dir|sed -r 's#[a-Z,0-9]+ (.*)#\1#g'|paste -s`) New_file=(`$Find_file|paste -s`) function check_md5(){ if [ ! -f "$Dir" ];then md5sum $Find_file >>$Dir else md5sum -c "$Dir" >/opt/check.log 2>&1 if [ $? -ne 0 ];then mail -s 'Html modify' $Email </opt/check.log fi fi } function check_file(){ if [ "${#Old_file[*]}" != "${#New_file[*]}" ];then echo "$New_file"|mail -s "Html modify" $Email fi } function main(){ check_md5 check_file } main
案例二:
编写rsync的服务管理脚本
脚本内容:
#!/bin/bash ############################################################## # File Name: web-file.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018 # Description: ############################################################## . /etc/init.d/functions if [ ! -f /etc/rsyncd.conf ];then action 'rsyncd.conf not exists' /bin/false exit fi start_cmd='rsync --daemon' stop_cmd='pkill rsync' port_cmd=`ss -tunlp|grep 873|wc -l` START() { if [ "$port_cmd" -eq 2 ];then action 'rsync service is already exists' /bin/true exit else $start_cmd action 'rsync started' /bin/true fi } STOP() { $stop_cmd action 'rsync is stoped' /bin/true } RESTART() { $stop_cmd action 'rsync is stoped' /bin/true sleep 1 $start_cmd action 'rsync is started' /bin/true } case $1 in start) START ;; stop) STOP ;; restart) RESTART ;; esac
案例三:
监控memcache服务是否正常，模拟用户（web客户端）检测。
使用nc命令加上set/get来模拟检测，以及监控响应时间及命中率。
脚本内容:
#!/bin/bash ############################################################## # File Name: memcache.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018 # Description: ############################################################## . /etc/init.d/functions date_cmd=`date +%F-%s` port_cmd=`nmap 172.16.1.21 -p 11211|awk 'NR==6{print $2}'` set_cmd=`printf "set key009 0 10 10\r\njiang12345\r\n"|nc 172.16.1.21 11211` get_cmd=`printf "get key009 \r\n"|nc 172.16.1.21 11211|tr -d '\r'|awk 'NR==2{print $1}'` restart_cmd=`systemctl restart memcached.service` if [ "$port_cmd" != "cloesd" ];then if [ "$get_cmd" != "jiang12345" ];then action 'memcache get key is successfull' /bin/true fi else $restart_cmd fi
案例四:
编写nginx服务管理脚本,并监控web服务是否正常
管理服务脚本:
#!/bin/bash ############################################################## # File Name: nginx.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018 # Description: ############################################################## . /etc/init.d/functions start_cmd='/application/nginx/sbin/nginx' stop_cmd='pkill nginx' restart_cmd='/application/nginx/sbin/nginx -s reload' if [ $# -ne 1 ];then echo "please input $0 start|stop|restart" exit fi case $1 in 1|start|START) $start_cmd action 'nginx started' /bin/true ;; stop|STOP) $stop_cmd action 'nginx stoped' /bin/true ;; restart|RESTART) $restart_cmd action 'nginx restarted' /bin/true ;; esac
监控web服务脚本:
#!/bin/bash ############################################################## # File Name: monitor.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018 # Description: ############################################################## start_cmd='/application/nginx/sbin/nginx' stop_cmd='pkill nginx' port_cmd=`ss -tunlp|grep 80|wc -l` curl_cmd=`curl -s -I 10.0.0.31 -w "%{http_code}\n" -o /dev/null` if [ "$port_cmd" -ne 1 ];then $stop_cmd sleep 2 $start_cmd if [ "$curl_cmd" -ne 200 ];then echo "$curl_cmd"|mail -s "web service failed" [email protected] fi fi
案例四:
实现对mysql数据库进行分库备份
脚本内容:
#!/bin/bash ############################################################## # File Name: monitor.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018 # Description: ############################################################## start_cmd='/application/nginx/sbin/nginx' stop_cmd='pkill nginx' port_cmd=`ss -tunlp|grep 80|wc -l` curl_cmd=`curl -s -I 10.0.0.31 -w "%{http_code}\n" -o /dev/null` if [ "$port_cmd" -ne 1 ];then $stop_cmd sleep 2 $start_cmd if [ "$curl_cmd" -ne 200 ];then echo "$curl_cmd"|mail -s "web service failed" [email protected] fi fi
案例五:
利用for循环打印下面字符串中字母数小于6的单词
I am oldboy teacher welcome to oldboy training class.
脚本内容:
#!/bin/bash
for i in I am oldboy teacher welcome to oldboy training class
do
if [ "${#i}" -gt 6 ];then
echo $i:${#i}
else
continue
fi
done案例六:
批量创建多个账号并生成随机密码,创建成功后要求账号名称和对应密码记录到文件中
脚本内容:
案例七:
[LVS主节点]手工开发ipvsadm管理lvs的脚本ip_vs
实现:/etc/init.d/lvs {start|stop|restart}
脚本内容:
#!/bin/bash ############################################################## # File Name: lvs.sh # Version: V1.0 # Author: da ya # Organization: [email protected] # Created Time : 2018-03-24 00:47:17 # Description: ############################################################## . /etc/init.d/functions ip_cmd=`ip addr show eth0|grep 10.0.0.13|wc -l` START() { if [ "$ip_cmd" -eq 0 ];then ip addr add 10.0.0.13/24 dev eth0 ipvsadm -C ipvsadm --set 30 5 60 ipvsadm -A -t 10.0.0.13:80 -s wrr -p 20 ipvsadm -a -t 10.0.0.13:80 -r 10.0.0.17:80 -g -w 1 ipvsadm -a -t 10.0.0.13:80 -r 10.0.0.18:80 -g -w 1 action 'LVS is started' /bin/true else action 'LVS is already exists' /bin/true fi } STOP() { ipvsadm -C ip addr del 10.0.0.13/24 dev eth0 action 'LVS is stoped' /bin/true } RESTART() { ipvsadm -C ip addr del 10.0.0.13/24 dev eth0 action 'LVS is stoped' /bin/true ip addr add 10.0.0.13/24 dev eth0 ipvsadm --set 30 5 60 ipvsadm -A -t 10.0.0.13:80 -s wrr -p 20 ipvsadm -a -t 10.0.0.13:80 -r 10.0.0.17:80 -g -w 1 ipvsadm -a -t 10.0.0.13:80 -r 10.0.0.18:80 -g -w 1 action 'LVS is restarted' /bintrue } case $1 in start) START ;; stop) STOP ;; restart) RESTART ;; *) echo 'Usage: input { start|stop|restart }' ;; esac
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