欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

shell脚本实例 博客分类: Linux/Unix 脚本F# 

程序员文章站 2024-03-21 15:36:52
...

1. 写一个脚本,利用循环计算10的阶乘

#!/bin/sh

 

factorial=1

 

for a in `seq 1 10`

do

        factorial=`expr $factorial \* $a`

done

 

echo "10! = $factorial"


注:上面有一行,for a in `seq 1 10`,其中seq 1 10 , 即列出现1到10之间所有的数字,这一行也可改为:for a in "1 2 3 4 5 6 7 8 9 10"

2. 写一个脚本,执行后,打印一行提示“Please input a number:",要求用户输入数值,然
后打印出该数值,然后再次要求用户输入数值。直到用户输入 "end"停止。

#!/bin/sh

 

unset var

 

while [   "$var" != "end" ]

do

      echo -n "please input a number: "

      read var

      if [ "$var" = "end" ]

      then

          break

      fi

      echo "var is $var"

done

 

3. 写一个脚本,利用循环和continue关键字,计算100以内能被3整除的数之和

#!/bin/sh

 

sum=0

for a in `seq 1 100`

do

      if [ `expr $a % 3` -ne 0 ]

      then

            continue

      fi

      echo $a

      sum=`expr $sum + $a`

done

 

echo "sum = $sum"

 

4.一个函数,利用shift计算所有参数乘积,假设参数均为整数( 特殊变量$# 表示包含参数的个数)

#! /bin/sh

 

result=1

while [ $# -gt 0 ]

do

      result=`expr $result \* $1`

      shift

done

echo $result

 

 

5.写一个脚本,可以根据参数文件名,以正确的参数调用tar来解压缩tar.gz或tar.bz2文件。

#!/bin/sh

 

case ${1##*.tar.} in

      bz2)

          tar jxvf $1

          ;;

      gz)

          tar zxvf $1

          ;;

      *)

          echo "wrong file type"

esac

 

6.写一个脚本以方便用户查询rpm的相关信息。这个脚本首先提示用户选择查询依据,比如
文件名,包名,全部等。然后提示用户选择查询信息,比如包名,包里所包含的所有文件,
包的信息等。然后询问是否继续查询,是则循环刚才的过
程,否则退出。

#!/bin/sh

RPM=/bin/rpm

option="-q"

 

while true

do

        echo "what to query?"

        select var in   "All" "file" "package name"

        do

               case $var in

               All)

                       option=$option"a"

                       break

                      ;;

               file)

                       echo -n "please input file name: "

                       option=$option"f"

                       read argument

                       break

                      ;;

                package\ name)

                       echo -n "please input package name: "

                       read argument

                       break

                      ;;

               *)

                       echo "please choose between 1-3"

                      ;;

               esac

        done

 

        echo "what do you want to know?"

        select var in "location" "info" "package name"

        do

               case $var in

                location)

                       option=$option"l"

                       break

                      ;;

               info)

                       option=$option"i"

                       break

                      ;;

                package\ name)

                       break

                      ;;

               *)

                       echo "please choose between 1-3"

                      ;;

               esac

        done

 

        ${RPM}   $option $argument

 

        echo "continue? [yes/no]"

        read answer

 

        if [ answer = "no" ]

        then

               break

        fi

done

相关标签: 脚本 F#