标签：shell
1、企业实用脚本1
（生产实用案例）监控MySQL主从同步是否异常，如果异常，则发送短信或者邮件给管理员。提示：如果没主从同步环境,可以用下面文本放到文件里读取来模拟
阶段1：开发一个守护进程脚本每30秒实现检测一次。
阶段2：如果同步出现如下错误号（1158,1159,1008,1007,1062），则跳过错误。
阶段3：请使用数组技术实现上述脚本（获取主从判断及错误号部分）
[root@db02 shell]# mysql -uroot -pli123456 -S /data/3308/mysql.sock mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.16.2.10 Master_User: rep Master_Port: 3307 Connect_Retry: 60 Master_Log_File: mysql-bin.000004 Read_Master_Log_Pos: 188 Relay_Log_File: relay-bin.000008 Relay_Log_Pos: 253 Relay_Master_Log_File: mysql-bin.000004 Slave_IO_Running: Yes Slave_SQL_Running: No Replicate_Do_DB: Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 1007 Last_Error: Error ‘Can‘t create database ‘zzz‘; database exists‘ on query. Default database: ‘zzz‘ Query: ‘create database zzz‘ Skip_Counter: 0 Exec_Master_Log_Pos: 107 Relay_Log_Space: 2171 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 1007 Last_SQL_Error: Error ‘Can‘t create database ‘zzz‘; database exists‘ on query. Default database: ‘zzz‘. Query: ‘create database zzz‘ Replicate_Ignore_Server_Ids: Master_Server_Id: 2
#!/bin/sh
array=( 0 1158 1159 1008 1007 1062)
Port=3308
password=li123456
check_slave(){
master=`mysql -uroot -p$password -S /data/$Port/mysql.sock -e "show slave status\G;"|awk -F ‘[ :]+‘ ‘NR==3 {print $3}‘`
io=`mysql -uroot -p$password -S /data/$Port/mysql.sock -e "show slave status\G;"|awk -F ‘[ :]+‘ ‘NR==12 {print $3}‘`
sql=`mysql -uroot -p$password -S /data/$Port/mysql.sock -e "show slave status\G;"|awk -F ‘[ :]+‘ ‘NR==13 {print $3}‘`
errorno=`mysql -uroot -p$password -S /data/$Port/mysql.sock -e "show slave status\G;"|awk -F ‘[ :]+‘ ‘NR==20 {print $3}‘`
second=`mysql -uroot -p$password -S /data/$Port/mysql.sock -e "show slave status\G;"|awk -F ‘[ :]+‘ ‘NR==34 {print $3}‘`
for((i=0;i<${#array[@]};i++))
do
[ "$errorno" = "${array[$i]}" ]&&no=1
done
[ $no -ne 1 ]&&echo "$master error:$errorno"&&exit 100
if [ "$io" = "Yes" -a "$sql" = "Yes" -a "$second" = "0" ];then
echo "$master slave ok."
else
echo "$master slave error,please check."
fi
}
main(){
while true
do
check_slave
sleep 30
done
}
main企业实用脚本2
使用for循环在/oldboy目录下通过随机小写10个字母加固定字符串oldboy批量创建10个html文件
#!/bin/sh
[ -f /etc/init.d/functions ]&& . /etc/init.d/functions
mkdir -p /oldboy
for((i=1;i<=10;i++))
do
A=`head -c 500 /dev/urandom | tr -dc a-z | head -c 10`
touch /oldboy/${A}_oldboy.html
[ $? -eq 0 ]&& action "/oldboy/${A}_oldboy.html" /bin/true
done企业实用脚本3
将以上文件名中的oldboy全部改成oldgirl(用for循环实现),并且html改成大写
方法一：
#!/bin/bash
cd /oldboy/
array=(`ls`)
for i in ${array[*]}
do
rename oldboy oldgirl $i
rename html HTML $i
done方法二：
#!/bin/bash
cd /oldboy/
array=(`ls`)
for i in ${array[*]}
do
echo $i|awk -F ‘[_]‘ ‘{print "mv",$1"_"$2,$1"_oldgirl.HTML"}‘|bash
done方法三：
#!/bin/bash cd /oldboy/ ls>test.txt exec < test.txt while read line do rename oldbirl oldboy $line line=`rename oldbirl oldboy $line` rename HTML html $line done
企业实用脚本4
批量创建10个系统帐号oldboy01-oldboy10并设置密码（密码为随机8位字符串）
方法一
#!/bin/bash
for i in `seq -w 10`
do
echo $i|awk ‘{print "useradd oldboy"$0 " && echo `echo $RANDOM|md5sum|cut -c 1-8`|tee -a pass.txt|passwd --stdin oldboy" $0 }‘|bash
done方法二
#!/bin/bash for i in `seq -w 10` do echo oldboy$i|xargs -n1 useradd && echo oldboy$i":"`echo $RANDOM|md5sum|cut -c 1-8`|xargs -n1|tee -a aa.txt|chpasswd done
企业实用脚本5
写一个脚本，实现判断10.0.0.0/24网络里，当前在线用户的IP有哪些（方法有很多）
#!/bin/bash
[ -f /etc/init.d/functions ]&& . /etc/init.d/functions
trap "echo "cancle...";exit" 2
check_ip(){
ping -w 1 -c 1 10.0.0.$i>/dev/null
return $?
}
for i in {1..254}
do
{
action "10.0.0.$i" check_ip
}&
done企业实用脚本6
写一个脚本解决DOS攻击生产案例
提示：根据web日志或者或者网络连接数，监控当某个IP并发连接数或者短时内PV达到100，即调用防火墙命令封掉对应的IP，监控频率每隔3分钟。防火墙命令为：iptables -I INPUT -s 10.0.1.10 -j DROP
#!/bin/bash
check_ddos(){
netstat -antu|grep ESTABLISHED|awk -F ‘[ :]+‘ ‘{print $6}‘|sort|uniq -c > ESTABLISHED.log
[ $? -eq 0 ]&&exec < ESTABLISHED.log||exit 1
while read line
do
pv=`echo $line|awk ‘{print $1}‘`
ip=`echo $line|awk ‘{print $2}‘`
if [ $pv -gt 100 ]&&[ `/etc/init.d/iptables -L -n|grep $ip|wc -l` -gt 0 ];then
iptables -I INPUT -s $ip -j DROP
fi
done
}
main(){
while true
do
check_ddos
sleep 3m
done
}
main企业实用题7
开发mysql多实例启动脚本：
已知mysql多实例启动命令为：mysqld_safe--defaults-file=/data/3306/my.cnf &
停止命令为：mysqladmin -u root -poldboy123 -S /data/3306/mysql.sockshutdown
要求：用函数，case语句、if语句等实现。
#!/bin/sh
[ -f /etc/init.d/functions ]&& . /etc/init.d/functions
user=root
password=li123456
CMDpath=/application/mysql/bin
USAGE(){
echo -e "USAGE:$0 {port:3306|3307|3308...} {start|stop}"
exit 1
}
function_start_mysql(){
if [ `lsof -i:$1|wc -l` -eq 0 ];then
$CMDpath/mysqld_safe --defaults-file=/data/$1/my.cnf &
action "mysql $1 start success..." /bin/true
else
echo "mysql $1 is running..."
fi
}
function_stop_mysql(){
if [ `lsof -i:$1|wc -l` -eq 0 ];then
echo "mysql $1 is not running..."
else
$CMDpath/mysqladmin -u $user -p$password -S /data/$1/mysql.sock shutdown
action "mysql $1 stop..." /bin/true
fi
}
case "$2" in
start)
function_start_mysql $1 $2
;;
stop)
function_stop_mysql $1 $2
;;
*)
USAGE
;;
esac企业实用题8
如何实现对MySQL数据库进行分库备份，请用脚本实现
#!/bin/sh
USER=root
PASSWD=li123456
SOCKET=/data/3306/mysql.sock
LOGIN="mysql -u$USER -p$PASSWD -S $SOCKET"
DUMP="mysqldump -u$USER -p$PASSWD -S $SOCKET"
DATABASE=$($LOGIN -e "show databases;"|grep -Ev "_schema|mysql|test"|sed ‘1d‘)
for database in $DATABASE
do
$DUMP $database -R -F --master-data=2 --events|gzip > /server/backup/$database/${database}_${table}_$(date +%F).sql.gz
done
done企业实用题9
如何实现对MySQL数据库进行分库加分表备份，请用脚本实现
#!/bin/sh
USER=root
PASSWD=li123456
SOCKET=/data/3306/mysql.sock
LOGIN="mysql -u$USER -p$PASSWD -S $SOCKET"
DUMP="mysqldump -u$USER -p$PASSWD -S $SOCKET"
DATABASE=$($LOGIN -e "show databases;"|grep -Ev "_schema|mysql|test"|sed ‘1d‘)
for database in $DATABASE
do
TABLE=$($LOGIN -e "use $database;show tables;"|sed ‘1d‘)
for table in $TABLE
do
[ ! -d /server/backup/$database ] && mkdir -p /server/backup/$database
$DUMP $database $table|gzip > /server/backup/$database/${database}_${table}_$(date +%F).sql.gz
done
done企业实用脚本10
bash for循环打印下面这句话中字母数不大于6的单词(昆仑万维实用脚本)。
I am oldboy teacher welcome to oldboy training class.
方法一：
#!/bin/bash word="I am oldboy teacher welcome to oldboy training class" echo $word|sed ‘s# #\n#g‘> a.log exec < a.log while read line do [ `echo $line|wc -c` -le 7 ]&&echo $line done
企业实用脚本11
开发shell脚本分别实现以脚本传参以及read读入的方式比较2个整数大小。以屏幕输出的方式提醒用户比较结果。注意：一共是开发2个脚本。当用脚本传参以及read读入的方式需要对变量是否为数字、并且传参个数做判断
方法一：
#!/bin/bash
usage(){
echo "usage:$0 int1 int2"
exit 1
}
compare(){
[ $1 -gt $2 ]&&echo "$1 > $2"
[ $1 -eq $2 ]&&echo "$1 = $2"
[ $1 -lt $2 ]&&echo "$1 < $2"
}
main(){
[ -z "$1" ]&&usage
[ -z "$2" ]&&usage
expr $1 + $2 + 1 &>/dev/null
[ $? -ne 0 ]&&usage
compare $1 $2
}
main $1 $2方法二：
#!/bin/bash read -p "Input a:" a read -p "Input b:" b [ -z "$a" ]&&echo "usage:$0 int1 int2"&&exit 1 [ -z "$b" ]&&echo "usage:$0 int1 int2"&&exit 2 expr $a + $b + 1 &>/dev/null [ $? -ne 0 ]&&echo "usage:$0 int1 int2"&&exit 3 [ $a -gt $b ]&&echo "$a > $b" [ $a -eq $b ]&&echo "$a = $b" [ $a -lt $b ]&&echo "$a < $b"
企业实用脚本12
打印选择菜单，一键安装Web服务：
[root@oldboyscripts]# sh menu.sh
1.[install lamp]
2.[install lnmp]
3.[exit]
pls input the num you want:
要求：
1、当用户输入1时，输出“startinstalling lamp.”然后执行/server/scripts/lamp.sh，脚本内容输出"lampis installed"后退出脚本；
2、当用户输入2时，输出“startinstalling lnmp.”然后执行/server/scripts/lnmp.sh输出"lnmpis installed"后退出脚本;
3、当输入3时，退出当前菜单及脚本；
4、当输入任何其它字符，给出提示“Input error”后退出脚本。
5、要对执行的脚本进行相关条件判断，例如：脚本是否存在，是否可执行等。
#!/bin/bash
menu(){
cat <<END
1.[install lamp]
2.[install lnmp]
3.[exit]
END
}
menu
file1=/server/scripts/lamp.sh
file2=/server/scripts/lnmp.sh
read -p "Select num which you want:" a
[ -z "$a" ]&&{
echo "You shoult input one num..."
exit 1
}
[ $a -ne "1" -a $a -ne "2" -a $a -ne "3" ]&&{
echo "Input num with 1 or 2 or 3..."
exit 2
}
[ $a -eq "1" ]&&{
if [ -f "$file1" -a -x "$file1" ]
then
echo "start install lamp..."
/bin/sh $file1
else
echo "$file1 is not exist or can not be execute!"
exit 3
fi
}
[ $a -eq "2" ]&&{
if [ -f "$file2" -a -x "$file2" ]
then
echo "start install lnmp..."
/bin/sh $file2
else
echo "$file2 is not exist or can not be execute!"
exit 4
fi
}
[ $a -eq 3 ]&&{
echo "Exit install..."
exit 5
}企业实用脚本13
1、监控web服务是否正常，不低于3种监控策略。
2、监控db服务是否正常，不低于3种监控策略。
要求间隔1分钟，持续监控。
#!/bin/bash
url=wwchengbi.cn
Port=80
check_web(){
[ -f /etc/init.d/functions ]&& . /etc/init.d/functions
if [ "`nc -w 5 $url $Port &&echo ok`" = "ok" ];then
#if [ "`echo -e ‘\n‘|telnet $url $Port|grep Connected|wc -l`" = "1" ];then
#if [ "`nmap $url -p $Port|grep open|wc -l`" = "1" ];then
#if [ "`curl -I http://$url 2>/dev/null|head -1|egrep "200|302|301"|wc -l`" = "1" ];then
#if [ "`curl -I -s -o /dev/null -w ‘%{http_code}\n‘ http://$url`" = "200" ];then
action "$url $Port" /bin/true
else
action "$url $Port" /bin/false
fi
}
main(){
while true
do
check_web
sleep 1m
done
}
main
#!/bin/bash
Port=3306
check_db(){
[ -f /etc/init.d/functions ]&& . /etc/init.d/functions
#if [ `lsof -i:$Port|wc -l` -gt 1 ];then
#if [ "`netstat -tunlp|grep 3306|wc -l`" = "1" ];then
if [ `mysql -umha -pmha -h 172.16.2.10 -P $Port -e "show databases;"|wc -l` -gt 1 ];then
action "MySQL $Port online" /bin/true
else
action "MySQL $Port down" /bin/false
fi
}
main(){
while true
do
check_db
sleep 1m
done
}
main企业实用脚本14
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
企业实用脚本15
面试及实用考试题：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(10分钟时间完成)
#!/bin/bash
check_www(){
md5sum -c /tmp/md5_www.log > /tmp/result_www.log
[ ! -f /tmp/result_www.log ]&&echo "/tmp/result_www.log not exist."exit2
exec < /tmp/result_www.log
while read line
do
file=`echo $line|awk -F ‘ ‘ ‘{printf $1}‘`
result=`echo $line|awk -F ‘ ‘ ‘{printf $2}‘`
#echo $file
#echo $result
[ ! "$result" = "OK" ]&&action "$file" /bin/false
done
}
main(){
while true
do
LANG=en
[ -f /etc/init.d/functions ]&& . /etc/init.d/functions
[ ! -f /tmp/md5_www.log ]&& echo "/tmp/md5_www.log not exsit."&&exit 1
check_www
action "Alii check done." /bin/true
sleep 3m
done
}
main
标签：shell
原文地址：http://lilongzi.blog.51cto.com/5519072/1837858
