Shell命令_for

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

#!/bin/bash

# Author:James 2016-10-15

# 集合以空格分割

for  i in 1 2 3 4 5 6

    do

        echo "$i"

    done

#!/bin/bash

# Author:James 2016-10-15

# 批量压缩脚本

cd /tmp/shs

#所有sh文件覆盖到sh.log文件

ls *.sh > sh.log

for i in $(cat sh.log)

    do

        #tar -zxf $i &>/dev/null

        echo "File Name is $i"

    done

rm -rf /tmp/shs/sh.log

#!/bin/bash

# Author:James 2016-10-15

# 计算1..100之和

sum=0

for(( i=1;i<=100;i++ ))

        do

                #echo "$i"

                sum=$(( $sum+$i ))

        done

echo "sum is:$sum"

#!/bin/bash

# Author:James 2016-10-15

# 批量添加用户和默认密码

#等待30秒输入name

read -t 30 -p "input name:" name

read -t 30 -p "input password:" pass

read -t 30 -p "input number:" num

# 输入的name,pass,num都不是控制

if [ ! -z "$name" -a ! -z "$pass" -a ! -z "$num" ]

        then

                # 将num变量以数字开头的结尾的字符改为空字符串

                y=$(echo $num | sed ‘s/^[0-9]*$‘//g)

                #变量y为空，表示num变量都是数字

                if [ -z "$y" ]

                        then

                                for(( i=1;i<=$num;i++ ))

                                        do

                                                #批量添加用户

                                                /usr/sbin/useradd "$name$i" &>/dev/null

                                                #批量赋予默认密码

                                                echo $pass | /usr/bin/passwd --stdin "&name$i" &>/dev/null

                                        done

                fi

fi

# 使用cat /etc/passwd 查看用户是否增加成功