Generate random numbers in the shell

Command Introduction

$RANDOM # #一般产生4-5 digits

Column description

[Email protected] shell]# echo $RANDOM

9926

[Email protected] shell]# echo $RANDOM

16517

[Email protected] shell]# echo $RANDOM

3839

[Email protected] shell]# echo $RANDOM

5857

2. Generate random Numbers (0-9)

echo $ (($RANDOM%10))

[[email protected] shell]# echo $ (($RANDOM%10))

9

[[email protected] shell]# echo $ (($RANDOM%10))

7

[[email protected] shell]# echo $ (($RANDOM%10))

3. Generate a number of random letters, and specify a few of them

[Email protected] shell]# echo $RANDOM | md5sum | Cut-c 1-6

cf837f

[Email protected] shell]# echo $RANDOM | md5sum | Cut-c 1-6

7ac9ff

[Email protected] shell]# echo $RANDOM | md5sum | Cut-c 1-6

d5c27d

[Email protected] shell]# echo $RANDOM | md5sum | Cut-c 6-12

Fcb22b2

[Email protected] shell]# echo $RANDOM | md5sum | Cut-c 6-12

2f6b7bf

This article is from the "Sdsca" blog, make sure to keep this source http://sdsca.blog.51cto.com/10852974/1890834

Generate random numbers in the shell