linux产生随机的方法
取8位数字的方法
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[root@master scripts]
# echo $RANDOM
12465
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[root@master scripts]
# echo $((RANDOM+10000000))
10023190
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[root@master scripts]
# echo $RANDOM | md5sum | cut -c 1-8
ae74cedb
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[root@master scripts]
# uuidgen| md5sum | cut -c 1-8
fdfca8ec
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[root@master scripts]
# mkpasswd -l 8
6zhFj7T>
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[root@master scripts]
# echo `date +%s` | md5sum | cut -c 1-8
f6d58a59
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更随机的方法
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[root@master scripts]
# echo "`date +%s`$RANDOM" | md5sum | cut -c 1-8
0daddd89
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[root@master scripts]
# openssl rand -base64 4
jW
/xRw
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[root@master scripts]
# head /dev/urandom | cksum
1181625912 2520
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[root@master scripts]
# cat /proc/sys/kernel/random/uuid == uuidgen
dfdec661-b0b7-48d3-b0db-73d1d7d09e06
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cuizhiliang
