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1.猜数字
2.批量创建用户
3.监控网卡Receive Transmit 数据的变化
4.部署Linux
5.系统性能检测脚本
6.分区脚本
7.数据库脚本 1.猜数字
随机数的生成
使用环境变量RANDOM#xff0c;范围是0#xff5e;32767
编写guest.sh#xff0c;实现以下功能#xff1…目录
1.猜数字
2.批量创建用户
3.监控网卡Receive Transmit 数据的变化
4.部署Linux
5.系统性能检测脚本
6.分区脚本
7.数据库脚本 1.猜数字
随机数的生成
使用环境变量RANDOM范围是032767
编写guest.sh实现以下功能 1、随机生成一个120的数字 2、每猜一次都会提示目前数字与随机数的大小关系直到用户猜对提示成功 3、当用户输入exit时退出脚本。
#!/bin/bash
let num$RANDOM%20
while true
doread -p Please input lucky number: dateif [ $date $num ]thenecho yes !!breakelif [ $date exit ]thenecho bye!exitelif [ $date -gt $num ]thenecho too bigelseecho too smallfi
done2.批量创建用户
执行users_create.sh userlist passlist 建立userlist中的用户 设定userlist中的密码为paslist中的密码 当脚本后面跟得文件个数不足两个时报错 当文件行数不一致时报错 当文件不存在时报错 当用户存在时报错
#!/bin/bash
if [ $# -lt 2 ]
thenecho error: 文件不足两个
elif [ ! -e $1 ]
thenecho error: $1 文件不存在
elif [ ! -e $2 ]
thenecho error: $2 文件不存在
elif [ awk END{print NR} $1 ! awk END{print NR} $2 ]
thenecho error: 文件行数不一致elseLINESawk END{print NR} $1 for LINE in seq 1 $LINESdoUSERNAMEsed -n ${LINE}p $1 PASSWORDsed -n ${LINE}p $2 if id $USERNAME /dev/nullthenecho error: $USERNAME 该用户已存在elseuseradd $USERNAMEecho $PASSWORD | passwd --stdin $USERNAME /dev/nullecho $USERNAME $PASSWORD 用户创建成功fidone
fi3.监控网卡Receive Transmit 数据的变化
#!/bin/bash
if [ -z $1 ]
thenecho Please input net device following $0 !!
elif ifconfig $1 /dev/null
thenwhile truedoRS1$(awk /$1/{print \$2} /proc/net/dev)TR1$(awk /$1/{print \$10} /proc/net/dev)sleep 1RS2$(awk /$1/{print \$2} /proc/net/dev)TR2$(awk /$1/{print \$10} /proc/net/dev)echo -ne Receice: $[$RS2-$RS1]byte/s, Transmit: $[$TR2-$TR1]byte/secho -ne \rdone
elseecho no
fi 4.部署Linux
1.修改IP
2.添加本机解析
3.修改主机名
#!/bin/bash
if [ -z 1 ]
thenecho Please input ID following $0 !!
elif echo $1 | grep -E ^[[:digit:]]{1,}$
thenecho Please input A number following $0 !!hostnamectl set-hostname vm$1echo 192.168.67.$1 vm$1 /etc/hostsDEV_COUNTnmcli device show | awk BEGIN{N0}/GENERAL.DEVICE/!/lo/{N}END{ print N}[ $DEV_COUNT -gt 1 ]{for DEVICE in nmcli device show | awk /GENERAL.DEVICE/!/lo/{ print $2}doread -p Do you want set $DEVICE: STATEcase $STATE inyes|YES|y|Y)read -p Please input ip address: IP
cat /etc/sysconfig/network-scripts/ifcfg-$DEVICE EOF
BOOTPROTOnone
NAME$DEVICE
DEVICE$DEVICE
ONBOOTyes
IPADDR$IP
PREFIX24
DNS1114.114.114.114
EOF;;no|NO|n|N);;*)esacnmcli connection reloadnmcli connection up $DEVICEdone
}
fi 5.系统性能检测脚本
执行check_upload.sh 显示效果如下 cpu 实际用量% mem 实际用量%
#!/bin/bash
echo cpu 实际用量 $(printf %0.2f ps ax -o %cpu | awk BEGIN{CPU0}{CPU$1}END{print CPU} )%
echo mem 实际用量 $(printf %0.2f ps ax -o %mem | awk BEGIN{MEM0}{MEM$1}END{print MEM} )%6.分区脚本
用脚本在当前系统添加一个swap分区 swap分区大小为500M并开机自动激活分区
#!/bin/bash
if [ -z $1 ]
thenecho error: please input device for swap
elif [ $USER ! root ]
thenecho error: please run $0 with root!!
else[ ! -b $1 ] {echo $1 is not block deviceexit}
fi
/usr/bin/expect EOF
spawn fdisk $1
expect {Command {send n\r}
}
expect {Select { send \r;exp_continue }Partition number { send \r;exp_continue }First sector { send \r;exp_continue }Last sector { send 500M\r;exp_continue }signature { send yes\r;exp_continue }Command { send wq\r }}expect eof
EOFfdisk $1 EOF
t82
wq
EOFDISKfdisk -l $1 | awk END{print $1}
mkswap $DISKgrep ^$DISK /etc/fstab {swapon -a
} || {echo $DISK swap swap defaults 0 0 /etc/fstabswapon -a
}7.数据库脚本 执行db_dump.sh westos数据库密码 脚本执行后会备份数据库中所有库到 /mnt/mysqldump目录中 备份文件的名称为库名称.sql 当此文件存在时进行如下判断 输入S跳过备份 输入B备份 库名称.sql 到库名称_backup.sql 输入O时覆盖源文件
#!/bin/bash
if [ $USER ! root ]
thenecho Please run $0 with root
elif [ -z $1 ]
thenecho Error : please input db password following $0
elif [ -z rpm -qa | grep mariadb-server ]
thenecho db server is not installed
elif [ ! -e /var/lib/mysql/mysql.sock ]
thenecho db server is not runnig
elseDB_LISTmysql -uroot -p$1 -NE -e SHOW DATABASES; 2 /dev/null |grep -E ^\*|_schema$ -v[ $? ! 0 ] {echo ERROR: $1 is wrong password !!exit 1}
fimkdir -p /mnt/mysqldumpfor DB_NAME in $DB_LIST
doif [ ! -e /mnt/mysqldump/${DB_NAME}.sql ]thenmysqldump -uroot -p$1 $DB_NAME /mnt/mysqldump/${DB_NAME}.sql echo ${DB_NAME} is backup to /mnt/mysqldump/${DB_NAME}.sqlelseecho /mnt/mysqldump/${DB_NAME}.sql is existecho you can do this action: [S]kip [B]ackup [O]verwriterread -p please input action: ACTIONcase $ACTION ins|S|Skip|SKIP);;B|b|Backup|BACKUP)mv /mnt/mysqldump/${DB_NAME}.sql /mnt/mysqldump/${DB_NAME}_backup.sqlmysqldump -uroot -p$1 $DB_NAME /mnt/mysqldump/${DB_NAME}.sql echo ${DB_NAME} is backup to /mnt/mysqldump/${DB_NAME}.sql;;o|O|Overwriter|OVERWRITER)mysqldump -uroot -p$1 $DB_NAME /mnt/mysqldump/${DB_NAME}.sql echo ${DB_NAME} is backup to /mnt/mysqldump/${DB_NAME}.sql;;*)echo error:wrong action !!esacfi
done
