shell脚本之练习题

 设计一个shell程序，添加一个新组为class1，然后添加属于这个组的30个用户，用户名的形式为stdxx，其中xx从01到30。

i=1
groupadd class1
while [ $i -le 30 ]
do
if [ $i -le 9 ] ;then
USERNAME=stu0${i}
else
USERNAME=stu${i}
fi
useradd $USERNAME
chgrp -R class1 /home/$USERNAME
i=$(($i+1))
done

 编写shell程序，实现自动删除50个账号的功能。账号名为stud1至stud50。

#!/bin/sh
i=1
while [ $i -le 50 ]
do
userdel -r stud${i}
i=$(($i+1 ))
done

mysql备份实例，自动备份mysql，并删除30天前的备份文件

#!/bin/sh

#auto backup mysql
#wugk  2012-07-14
#PATH DEFINE

BAKDIR=/data/backup/mysql/`date +%Y-%m-%d`
MYSQLDB=www
MYSQLPW=backup
MYSQLUSR=backup

if[ $UID -ne 0 ];then
echo This script must use administrator or root user ,please exit!
sleep 2
exit 0
fi

if[ ! -d $BAKDIR ];then
mkdir -p $BAKDIR
else
echo This is $BAKDIR exists ,please exit ….
sleep 2
exit
fi

###mysqldump backup mysql

/usr/bin/mysqldump -u$MYSQLUSR -p$MYSQLPW -d $MYSQLDB >/data/backup/mysql/`date +%Y-%m-%d`/www_db.sql

cd $BAKDIR ; tar -czf  www_mysql_db.tar.gz *.sql

cd $BAKDIR ;find  . -name “*.sql” |xargs rm -rf[ $? -eq 0 ]&&echo “This `date +%Y-%m-%d` RESIN BACKUP is SUCCESS”

cd /data/backup/mysql/ ;find . -mtime +30 |xargs rm -rf

自动安装Nginx脚本，采用case方式，选择方式，也可以根据实际需求改成自己想要的脚本

#!/bin/sh

###nginx install shell
###wugk 2012-07-14
###PATH DEFINE

SOFT_PATH=/data/soft/
NGINX_FILE=nginx-1.2.0.tar.gz
DOWN_PATH=http://nginx.org/download/

if[ $UID -ne 0 ];then
echo This script must use administrator or root user ,please exit!
sleep 2
exit 0
fi

if[ ! -d $SOFT_PATH ];then
mkdir -p $SOFT_PATH
fi

download ()
{
cd $SOFT_PATH ;wget $DOWN_PATH/$NGINX_FILE
}

install ()
{
yum install pcre-devel -y
cd $SOFT_PATH ;tar xzf $NGINX_FILE ;cd nginx-1.2.0/ &&./configure –prefix=/usr/local/nginx/ –with-http_stub_status_module –with-http_ssl_module
[ $? -eq 0 ]&&make &&make install
}

start ()
{
lsof -i :80[ $? -ne 0 ]&&/usr/local/nginx/sbin/nginx
}

stop ()
{
ps -ef |grep nginx |grep -v grep |awk ‘{print $2}’|xargs kill -9
}

exit ()
{
echo $? ;exit
}

###case menu #####

case $1 in
download )
download
;;

install )
install
;;

start )
start
;;
stop )
stop
;;

* )

echo “USAGE:$0 {download or install or start or stop}”
exit
esac

文件上传，列出部分代码

#!/bin/sh

DATE=`date +%Y_%m_%d_%H`

if [ $1 ]
then
for file in $(sed '/^$/d' $1)     //去掉空行
do
if [ -f $file ]                 //普通文件
then
res=`scp $file $2:$file`      //上传文件
if [ -z $res ]                //上传成功
then
echo $file >> ${DATE}_upload.log   //上传成功的日志
fi
elif [ -d $file ]              //目录
then
res=`scp -r $file $2:$file`
if [ -z $res ]
then
echo $file >> ${DATE}_upload.log
fi
fi
done
else
echo "no file" >> ${DATE}_error.log
fi