shell脚本面试题

你的名字 2023-08-17 15:36 123阅读 0赞

**1****：开发Shell脚本判断系统根分区剩余空间的大小，如果低于1000MB就提示不足，否则提示充足。**

#!/bin/bash
    
    m=`df -m | awk '{print $4}' | sed -n 2p`
    
    if [ $m -gt 1000 ] ; then
    
            echo "充足"
    
    else
    
            echo "不足"
    
    fi

**2****：分别使用变量定义、read读入及脚本传参方式实现比较2个整数的大小。**

#!/bin/bash
    
    read -p "请输入两个数：" num1 num2
    
    a=$num1
    
    b=$num2
    
    if [ "echo "$a" | sed -r 's/[^0-9]//g'"="$a" ];then
    
            if [ "echo "$b" | sed -r 's/[^0-9]//g'"="$a" ];then
    
            if [ $a -eq $b ];then
    
                    echo "两个数一般大"
    
            elif [ $a -gt $b ];then
    
                    echo "第一个数比第二个数大"
    
            else
    
                    echo "第二个数比第一个数大"
    
            fi
    
     
    
    else
    
            echo "第二个数不是整数"
    
    fi
    
     
    
    else
    
            echo "第一个数不是整数"
    
    fi

**3****：打印一个菜单如下，当用户选择对应的数字时，就执行对应项的应用，最好对用户的输入进行是否为整数判断。**

1.install lamp
    
      2.install lnmp
    
      3.exit
    
     
    
    #!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-24 17:45:43
    
    # Name: install.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
    cat << EOF
    
      1.install lamp
    
      2.install lnmp
    
      3.exit
    
    EOF
    
    read -p "please input choice" a
    
    if [ -n "$(echo $a| sed -n "/^[0-9]\+$/p")" ];then
    
            echo "please input num"
    
    fi
    
    if [ $a -eq 1 ];then
    
            yum install httpd mysql php -y
    
    elif [  $a -eq 2 ];then
    
            yum install nginx mysql php -y
    
    elif [ $a -eq 3 ];then
    
            exit 0
    
    fi

**4****：通过脚本传参的方式，检查Web网站URL是否正常（要求主体使用函数）。**

**\#\#\#\#****可以使用curl 命令取状态吗 与wget同理**

**curl -I -m 10 -o /dev/null -s -w %\{http\_code\} www.baidu.com**

#!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-24 14:31:53
    
    # Name: url.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
    function_url(){
    
    wget --spider -T 5 -q -t 2 $1
    
            if [ $? -eq 0 ];then
    
                    echo 'OK!'
    
            else   
    
                    echo 'error..'
    
            fi 
    
    }
    
    function_url $1

**5****：利用case语句开发Rsync服务启动停止脚本，并能通过chkconfig实现开机自启动。**

1 #!/bin/bash
    
      2 # Author: Peter zh
    
      3 # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
      4 # Time: 2019-08-24 14:35:58
    
      5 # Name: rsync.sh
    
      6 # Version: v1.0
    
      7 # Description: This is a Script.
    
      8 chkconfig rpcbind on
    
      9 chkconfig rsync on
    
     10 function_start(){
    
     11         rsync --daemon
    
     12         if [ $? -eq 0 ]
    
     13         then
    
     14                 echo 'rsync is start'
    
     15         else
    
     16                 echo 'error..'
    
     17         fi
    
     18 }
    
     19 function_stop(){
    
     20         pkill rsync
    
     21         if [ $? -eq 0 ]
    
     22         then
    
     23                 echo 'rsync is stop'
    
     24         else
    
     25                 echo 'errorrr..'
    
     26         fi
    
     27 }
    
     28 function_restart(){
    
     29         function_start
    
     30         function_stop
    
     31 }
    
     32 case $1 in
    
     33 start)
    
     34         function_start
    
     35 ;;
    
     36 stop)
    
     37         function_stop
    
     38 ;;
    
     39 restart)
    
     40         function_restart
    
     41 ;;
    
     42 *)
    
     43         echo "Usage:start|stop|restart"
    
     44 ;;
    
     45 esac

**6****：猜数字游戏。首先让系统随机生成一个数字，给这个数字定一个范围（1-60），让用户输入猜的数字，对输入进行判断，如果不符合要求，就给予高或低的提示，猜对后则给出猜对用的次数，请用while语句实现。**

#!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-24 17:11:05
    
    # Name: random.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
    sum1=0
    
    sum2=0
    
    number_range=$((RANDOM%60))
    
    while :
    
    do
    
    read -p "please input intger>> " num
    
    if [[ $num == "quit"  ]];then
    
            exit 0
    
    fi
    
    #echo $number_range
    
    if [ $num -lt $number_range ]
    
    then
    
            echo "little"
    
            let sum1++
    
    elif [ $num -gt $number_range  ];then
    
     
    
            echo 'big'
    
            let sum2++
    
    elif [ $num -eq $number_range ];then
    
            echo "all guess $((sum1+sum2+1))"
    
    fi
    
    done

**7****：分析nginx访问日志(自备)，把日志中每行的访问字节数对应字段数字相加，计算出总的访问量。给出实现程序，请用while循环实现。**

#!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-24 15:06:04
    
    # Name: nginxlog.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
    sum=0
    
    exec <  /application/nginx/logs/access.log
    
    while read line
    
    do
    
      b=`echo "$line" | awk '{print $10}'`
    
      if [ $? -eq 0 ]; then
    
       sum=$(($sum+$b))
    
      fi 
    
    done
    
    echo $sum

8：计算从1加到100之和（要求用for和while，至少给出两种方法）。

#!/bin/bash
    sum=0
    for i in {1..100}
    do
            let sum+=i
    done
    echo `seq -s "+" 100`"="$sum

**9****：利用bash for循环打印下面这句话中字母数不大于6的单词（某企业面试真题）。I am zzz teacher welcome to zzzzzz training class**

#!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-24 15:11:52
    
    # Name: 6.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
    a="I am zzz teacher welcome to zzzzzz training class"
    
    b=`echo $a |tr " " "\n"`
    
     
    
    for i in $b
    
    do
    
            if [[ `echo $i|wc -L` < 6 ]];then
    
                    echo $i
    
    fi
    
    done

提示:判断字符串长度的方法

1.wc -L

2.echo $(expr length $变量名)

3.echo $\{\#变量名\}

**10****：使用read读入方式比较两个整数大小，要求对用户输入的内容严格判断是否为整数，是否输入了两个数字。**

#!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-24 17:24:21
    
    # Name: bijiao.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
    read -p "first:" a
    
    read -p "second:" b
    
     
    
    if [[ -z $a || -z $b ]];then
    
            echo "please input num---"
    
            exit 1
    
    fi
    
     
    
    if [[ -n "$(echo $a| sed -n "/^[0-9]\+$/p")" && -n "$(echo $b| sed -n "/^[0-9]\+$/p")" ]];then
    
     
    
    if [ $a -lt $b ];then
    
           echo "big----small" $b $a
    
    elif [ $a -gt $b  ];then
    
            echo  "big----small" $a $b
    
    else
    
            echo 'same num'
    
    fi
    
     
    
    else
    
           echo "dont  want   abcd!#%^&...."
    
    fi

**11.关闭chkconfig命令中所有第5阶段下的程序，全都写成off**

#!/bin/bash
    
    # Author: Peter zh
    
    # Blog: https://www.cnblogs.com/zhangwduoduoj/
    
    # Time: 2019-08-21 11:08:30
    
    # Name: chkconfig.sh
    
    # Version: v1.0
    
    # Description: This is a Script.
    
     
    
    chk=`chkconfig --list|awk '{print $1}'`
    
    for i in $chk
    
    do
    
    judge=`chkconfig $i --list |awk '{print $7}'|cut -d: -f2`
    
            if [[ $judge == "off"  ]];then
    
            echo "$i dont need off ,already off"
    
            else
    
            chkconfig --level 5 $i off
    
            fi 
    
    done

转载于:https://www.cnblogs.com/zhangwduoduoj/p/11483396.html