导读 | 今天来给大家分享 7 个日常实用脚本; |
显示系统使用的以下信息:
主机名、IP地址、子网掩码、网关、DNS服务器IP地址信息
#!/bin/bash IP=`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' $IP echo '此机子网掩码是' $ZW echo '此机网关是' $GW echo '此机主机名是' $HN echo '此机DNS是' $DNS
#!/bin/bash DAY=`date +%Y%m%d` SIZE=`du -sh /var/lib/mysql` echo "Date: $DAY" >> /tmp/dbinfo.txt echo "Data Size: $SIZE" >> /tmp/dbinfo.txt cd /opt/dbbak &> /dev/null || mkdir /opt/dbbak tar zcf /opt/dbbak/mysqlbak-${DAY}.tar.gz /var/lib/mysql /tmp/dbinfo.txt &> /dev/null rm -f /tmp/dbinfo.txt crontab-e 55 23 */3 * * /opt/dbbak/dbbak.sh
每备份文件保存到系统的/mysqlbak目录里
用系统日期做备份文件名 webdb-YYYY-mm-dd.sql
每次完整备份后都生成新的binlog日志
把当前所有的binlog日志备份到/mysqlbinlog目录下
#mkdir /mysqlbak #mkdir /mysqlbinlog #service mysqld start cd /shell #vi webdb.sh #!/bin/bash day=`date +%F` mysqldump -hlocalhost -uroot -p123 webdb > /mysqlbak/webdb-${day}.sql mysql -hlocalhost -uroot -p -e "flush logs" tar zcf /mysqlbinlog.tar.gz /var/lib/mysql/mysqld-bin.0* #chmod +x webdb.sh #crontab -e 30 23 * * 7 /shell/webdb.sh
只检查服务vsftpd httpd sshd crond、mysql中任意一个服务的状态
如果不是这5个中的服务,就提示用户能够检查的服务名并退出脚本
如果服务是运行着的就输出 "服务名 is running"
如果服务没有运行就启动服务
#!/bin/bash read -p "请输入你的服务名:" service if [ $service != 'crond' -a $service != 'httpd' -a $service != 'sshd' -a $service != 'mysqld' -a $service != 'vsftpd' ];then echo "只能够检查'vsftpd,httpd,crond,mysqld,sshd" exit 5 fi service $service status &> /dev/null if [ $? -eq 0 ];thhen echo "服务在线" else service $service start fi
if [ -z $1 ];then echo "You mast specify a servername!" echo "Usage: `basename$0` servername" exit 2 fi if [ $1 == "crond" ] || [ $1 == "mysql" ] || [ $1 == "sshd" ] || [ $1 == "httpd" ] || [ $1 == "vsftpd" ];then service $1 status &> /dev/null if [ $? -eq 0 ];then echo "$1 is running" else service $1 start fi else echo "Usage:`basename $0` server name" echo "But only check for vsftpd httpd sshd crond mysqld" && exit2 fi
输出192.168.1.0/24网段内在线主机的ip地址
统计不在线主机的台数,并把不在线主机的ip地址和不在线时的时间保存到/tmp/ip.txt文件里
#!/bin/bash ip=192.168.1. j=0 for i in `seq 10 12` do ping -c 3 $ip$i &> /dev/null if [ $? -eq 0 ];then echo 在线的主机有:$ip$i else let j++ echo $ip$i >> /tmp/ip.txt date >> /tmp/ip.txt fi done echo 不在线的主机台数有 $j
用交互式的输入方法实现自动登录论坛数据库,修改用户密码
[root@test1 scripts]# vim input.sh #!/bin/bash End=ucenter_members MYsql=/home/lnmp/mysql/bin/mysql read -p "Enter a website directory : " webdir WebPath=/home/WebSer/$webdir/config echo $WebPath read -p "Enter dbuser name : " dbuser echo $dbuser read -sp "Enter dbuser password : " dbpass read -p "Enter db name : " dbname echo $dbname read -p "Enter db tablepre : " dbtablepre echo $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 fi else exit 2 fi
1)本机的数据库服务是否正在运行
2)能否与主数据库服务器正常通信
3)能否使用授权用户连接数据库服务器
4)本机的slave_IO进程是否处于YES状态
本机的slave_SQL进程是否处于YES状态
[root@test1 scripts]# vim test.sh #!/bin/bash netstat -tulnp | grep :3306 > /dev/null if [ $? -eq 0 ];then echo "服务正在运行" else service mysqld start fi ping -c 3 192.168.1.100 &> /dev/null if [ $? -eq 0 ];then echo "网络连接正常" else echo "网络连接失败" fi mysql -h192.168.1.100 -uroot -p123456 &> /dev/null if [ $? -eq 0 ];then echo "数据库连接成功" else echo "数据库连接失败" fi IO= mysql -uroot -p123 -e "show slave status\G" | grep Slave_IO_Running | awk '{print $2}' > /dev/null SQL= mysql -uroot -p123 -e "show slave status\G" | grep Slave_SQL_Running | awk '{print $2}' /dev/null if [ IO==Yes ] && [ SQL==Yes ];then echo “IO and SQL 连接成功” else echo "IO线程和SQL线程连接失败" fi
以上就是今天分享的全部内容;
对了,如果大家有 Shell 脚本的需求案例,也欢迎在这篇文章进行留言,案例多的话下次就整理个脚本合集给大家分享。
原文来自:https://mp.weixin.qq.com/s/FAcK3MDtNUhuKxhdRvwKOg
本文地址:https://www.linuxprobe.com/shell.html编辑:王华超,审核员:逄增宝
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