3 ways to get random strings (or numbers) in linux

1. Obtain a random 8-bit string:

method 1:

# echo $RANDOM |md5sum |cut -c 1-8

return:

471b94f2

Method 2:

# openssl rand -base64 4

return

vg3BEg==

Method 3:

# cat /proc/sys/kernel/random/uuid |cut -c 1-8

return

】ed9e032c

2. Get a random 8-digit number:

method 1:

# echo $RANDOM |cksum |cut -c 1-8

return

23648321

Method 2:

# openssl rand -base64 4 |cksum |cut -c 1-8

return

38571131

Method 3:

# date +%N |cut -c 1-8

return:

69024815