Xiaohan talks about Shell environment variables - RANDOM

RANDOM variable

Shell has an environment variable RANDOM, the range is 0-32767.

Xiaohan practical camp

•  We want to generate a number in the range of 0-25

[root@hya ~]# echo $(($RANDOM%26))
20

•  Get a number in the range of 1--68:

[root@hya ~]# echo $(($RANDOM%68+1))
47

• Get a number in the range of 6-87:

[root@hya ~]# echo $(($RANDOM%68+6))
23