Linux下产生随机密码的7种方法

Linux下产生随机密码的7种方法
1
[root@test-6 ~]# date +%s | sha256sum | base64 | head -c 32 ; echo
M2U0YTllN2I1NzZjNTNjZDZhYzM5NzIz
2
[root@test-6 ~]# < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-32};echo;
1jmWHhn9XwSOwv-1h_8DGjXFrX4lVAHf
3
[root@test-6 ~]# openssl rand -base64 32
wKKf6smfsrREu8L5FVKf9Y0o8VYwjRW3lphCrZa9kWg=
4
[root@test-6 ~]# tr -cd ‘[:alnum:]‘ < /dev/urandom | fold -w30 | head -n1
EWdZYJzdb4SIPBm6Z9iHQjfmUk
5
[root@test-6 ~]# < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c6
或 echo `tr -dc _A-Z-a-z-0-9 </dev/urandom |head -c 12`
Et3B46
6
[root@test-6 ~]# dd if=/dev/urandom bs=1 count=32 2>/dev/null | base64 -w 0 | rev | cut -b 2- | rev
bp/0g8JscWWHO0Nl5oFqOmXp/0RypvD27ukIMyohkR0
7
[root@test-6 ~]# date | md5sum
0bc2d0c2954a1f9d475f8714e5263cee
参考：http://blog.csdn.net/open_data/article/details/42521253