【脚本小子狂喜】日常实用脚本推荐

#!/bin/bashIP=`ifconfig eth0 | head -2 | tail -1 | awk '{print $2}' | awk -F":" '{print $2}'`ZW=` ifconfig eth0 | head -2 | tail -1 | awk '{print $3}' | awk -F":" '{print $2}'`GW=`route -n | tail -1 | awk '{print $2}'`HN=`hostname`DNS=`head -1 /etc/resolv.conf | awk '{print $2}'`echo '此机IP地址是' $IPecho '此机子网掩码是' $ZWecho '此机网关是' $GWecho '此机主机名是' $HNecho '此机DNS是' $DNS+wx：machinegunjoe666 领取资料

#!/bin/bashDAY=`date +%Y%m%d`SIZE=`du -sh /var/lib/mysql`echo "Date: $DAY" >> /tmp/dbinfo.txtecho "Data Size: $SIZE" >> /tmp/dbinfo.txtcd /opt/dbbak &> /dev/null || mkdir /opt/dbbaktar zcf /opt/dbbak/mysqlbak-${DAY}.tar.gz /var/lib/mysql /tmp/dbinfo.txt &> /dev/nullrm -f /tmp/dbinfo.txt
crontab-e55 23 */3 * * /opt/dbbak/dbbak.sh

#mkdir /mysqlbak #mkdir /mysqlbinlog#service mysqld startcd /shell#vi webdb.sh#!/bin/bashday=`date +%F`mysqldump -hlocalhost -uroot -p123 webdb > /mysqlbak/webdb-${day}.sqlmysql -hlocalhost -uroot -p -e "flush logs"tar zcf /mysqlbinlog.tar.gz /var/lib/mysql/mysqld-bin.0*#chmod +x webdb.sh #crontab -e30 23 * * 7 /shell/webdb.sh

方法1：使用read写脚本#!/bin/bashread -p "请输入你的服务名:" serviceif [ $service != 'crond' -a $service != 'httpd' -a $service != 'sshd' -a $service != 'mysqld' -a $service != 'vsftpd' ];thenecho "只能够检查'vsftpd,httpd,crond,mysqld,sshd"exit 5fiservice $service status &> /dev/null
if [ $? -eq 0 ];thhenecho "服务在线"elseservice $service startfi
或
方法2：使用位置变量来写脚本if [ -z $1 ];thenecho "You mast specify a servername!"echo "Usage: `basename$0` servername"exit 2fiif [ $1 == "crond" ] || [ $1 == "mysql" ] || [ $1 == "sshd" ] || [ $1 == "httpd" ] || [ $1 == "vsftpd" ];thenservice $1 status &> /dev/nullif [ $? -eq 0 ];thenecho "$1 is running"elseservice $1 startfielseecho "Usage:`basename $0` server name"echo "But only check for vsftpd httpd sshd crond mysqld" && exit2fi

#!/bin/baship=192.168.1.j=0for i in `seq 10 12`doping -c 3 $ip$i &> /dev/nullif [ $? -eq 0 ];thenecho 在线的主机有：$ip$ielselet j++echo $ip$i >> /tmp/ip.txtdate >> /tmp/ip.txtfidoneecho 不在线的主机台数有 $j

[root@test1 scripts]# vim input.sh
#!/bin/bash
End=ucenter_membersMYsql=/home/lnmp/mysql/bin/mysql
read -p "Enter a website directory : " webdirWebPath=/home/WebSer/$webdir/configecho $WebPath
read -p "Enter dbuser name : " dbuserecho $dbuser
read -sp "Enter dbuser password : " dbpass
read -p "Enter db name : " dbnameecho $dbname
read -p "Enter db tablepre : " dbtablepreecho $dbtablepre
Globalphp=`grep "tablepre*" $WebPath/config_global.php |cut -d "'" -f8`Ucenterphp=`grep "UC_DBTABLEPRE*" $WebPath/config_ucenter.php |cut -d '.' -f2 | awk -F "'" '{print $1}'`
if [ $dbtablepre == $Globalphp ] && [ $dbtablepre == $Ucenterphp ];then
     Start=$dbtablepre     Pre=`echo $Start$End`
     read -p "Enter you name : " userset     echo $userset
     Result=`$MYsql -u$dbuser -p$dbpass $dbname -e "select username from $Pre where username='$userset'\G"|cut -d ' ' -f2|tail -1`     echo $Result     if [ $userset == $Result ];then           read -p "Enter your password : " userpass           passnew=`echo -n $userpass|openssl md5|cut -d ' ' -f2`
           $MYsql -u$dbuser -p$dbpass $dbname -e "update $Pre set password='$passnew' where username='$userset';"           $MYsql -u$dbuser -p$dbpass $dbname -e "flush privileges;"     else           echo "$userset is not right user!"           exit 1     fielse     exit 2fi  +wx：machinegunjoe666 领取资料

[root@test1 scripts]# vim test.sh
#!/bin/bashnetstat -tulnp | grep :3306 > /dev/nullif [ $? -eq 0 ];thenecho "服务正在运行" elseservice mysqld startfiping -c 3 192.168.1.100 &> /dev/nullif [ $? -eq 0 ];thenecho "网络连接正常" elseecho "网络连接失败"fimysql -h192.168.1.100 -uroot -p123456 &> /dev/nullif [ $? -eq 0 ];thenecho "数据库连接成功" elseecho "数据库连接失败"fiIO= mysql -uroot -p123 -e "show slave status\G" | grep Slave_IO_Running | awk '{print $2}' > /dev/nullSQL= mysql -uroot -p123 -e "show slave status\G" | grep Slave_SQL_Running | awk '{print $2}' /dev/nullif [ IO==Yes ] && [ SQL==Yes ];thenecho “IO and SQL 连接成功”elseecho "IO线程和SQL线程连接失败"fi

结合/var/log/secure文件，将ssh登陆失败次数大于N的IP封顶
N=3SEC_FILE=/var/log/securefor ip in `grep "Failed password" $SEC_FILE|grep -Eo "([0-9]{1,3}\.){3}[0-9]{1,3}"|sort -n|uniq -c|awk '{if($1>$N) print $2}'`doiptables -A INPUT -s $ip -p tcp --dport 22 -j DROPdone

#!/bin/bash#Denyhosts SHELL SCRIPT#2017-01-24##When a IP is accessed 50 times through sshd, it is written to the hosts.deny file, #which prohibits the IP from connecting to the host via sshd##Add to timing task
cat /var/log/secure | awk '/Failed/{print $(NF-3)}' | sort | uniq -c | awk '{print $2"="$1;}' > /root/black.txt
DEFINE=50for i in $(cat /root/black.txt)do    IP=$( $i | awk -F'=' '{print $1}')    NUM=$( $i | awk -F'=' '{print $2}')    if [$NUM -gt $DEFINE]; then        grep $IP /etc/hosts.deny > /dev/null        if [$? -gt 0];then            echo "sshd:$IP" >> /etc/hosts.deny        fi    fidone

# vi check_network.sh
"#!/bin/bash
NIC=$1
echo -e "" In ------ Out""
while true; do
OLD_IN=$(awk '$0~""'$NIC'""{print $2}' /proc/net/dev)
OLD_OUT=$(awk '$0~""'$NIC'""{print $10}' /proc/net/dev)
sleep 1
NEW_IN=$(awk '$0~""'$NIC'""{print $2}' /proc/net/dev)
NEW_OUT=$(awk '$0~""'$NIC'""{print $10}' /proc/net/dev)
IN=$(printf ""%.1f%s"" ""$((($NEW_IN-$OLD_IN)/1024))"" ""KB/s"")
OUT=$(printf ""%.1f%s"" ""$((($NEW_OUT-$OLD_OUT)/1024))"" ""KB/s"")
echo ""$IN $OUT""
sleep 1
done"
执行：sh check.sh ens33

# vi check_web.sh
"#!/bin/bash
URL_LIST=""www.baidu.com www.sina.cn""
for URL in $URL_LIST; do
FAIL_COUNT=0
for ((i=1;i<=3;i++)); do
HTTP_CODE=$(curl -I -m 10 -o /dev/null -s -w %{http_code} $URL)
if [ $HTTP_CODE -eq 200 ]; then
echo ""$URL OK""
break
else
echo ""$URL retry $FAIL_COUNT""
let FAIL_COUNT++
fi
done
if [ $FAIL_COUNT -eq 3 ]; then
echo ""Warning: $URL Access failure!""
fi
done"

# vi check_mysql.sh
"#!/bin/bash
USER=bak
PASSWD=123456
IO_SQL_STATUS=$(mysql -u$USER -p$PASSWD -e 'show slave statusG' |awk -F:
'/Slave_.*_Running/{gsub("": "","":"");print $0}') #gsub 去除冒号后面的空格
for i in $IO_SQL_STATUS; do
THREAD_STATUS_NAME=${i%:*}
THREAD_STATUS=${i#*:}
if [ ""$THREAD_STATUS"" != ""Yes"" ]; then
echo ""Error: MySQL Master-Slave $THREAD_STATUS_NAME status is
$THREAD_STATUS!""
fi
done"

"#!/bin/bash
DATE=$(date +%d/%b/%Y:%H:%M)
LOG_FILE=/etc/nginx/logs/access.log
ABNORMAL_IP=$(tail -n5000 $LOG_FILE |grep $DATE |awk '{a[$1]++}END{for(i in a)if(a[i]>10)print i}')
for IP in $ABNORMALIP; do
if [ $(iptables -vnL |grep -c ""$IP"") -eq 0 ]; then
iptables -I INPUT -s $IP -j DROP
echo ""$(date +'%F%T') $IP"" >> /tmp/drop_ip.log
fi
done"