shell基础练习<一>

1、要求用户输入姓名，年龄，性别
#!/bin/bash
read -p "Please input your name:" name
read -p "Please input your age: " age
read -p "Please input your sex:" sex
echo "Your name is $name,age is $age,sex is $sex."
2、写一个脚本arvg.sh,可以读取用户输入的参数变量，如sh arvg.sh test12 ,然后问用户是否要创建目录，
如果用户回答yes或者YES，则为用户创建目录，然后问用户是否为其创建文件，如果回答yes，则在刚才已经
创建好的目录下创建test01。
#!/bin/bash
if [ $#  -lt 1 ];then
    echo "Please like 'sh  test.sh a b c'"
fi
read -p  "are you mkdir file?Please enter yes/YES or no:" qq
if [ $qq == yes ] || [ $qq == YES];then
    mkdir  $1
    for i in $(seq 1 10);
    do
        touch $1/test$i
    done
else    echo "No file created"
    exit 0
fi
3、随机更改密码：
#!/bin/bash
#2011/07/10 by larry
LOG=PassChange`date +%F`.log
> $pass
cat /etc/passwd | while read line
do
    id=`echo $line | awk -F":" '{print $3}'`
    user=`echo $line | awk -F":" '{print $1}'`
    PASS=$RANDOM
    if [ $id -lt 500 ];then
            echo "$user is system users."
            elif [ $id -gt 500 ];then
               echo $RANDOM | passwd $user --stdin
            echo "$USER $id $RANDOM" >> $LOG
    fi
done
#####################################
#!/bin/bash
#2011/07/10
now=`date +%F`
file=/etc/passwd
for user1 in `cat $file | awk -F: '$3<500{print $1}'`
do
    echo $user1 is systerm user
done
for user2 in `cat $file | awk -F: '$3>500{print $1}'`
do
    echo $RANDOM |passwd $user2 --stdin  >> /dev/null
        echo "$user2 $RANDOM" >> Pass$now.log
done