[neo@test .deploy]$ echo `< /dev/urandom tr -dc A-Z-a-z-0-9 | head -c 8`
GidAuuNN
[neo@test .deploy]$ echo `< /dev/urandom tr -dc A-Z-a-z-0-9 | head -c 8`
UyGaWSKr
		
		

我常常使用這樣的隨機字元初始化密碼

		
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:alnum:] | head -c 8`
xig8Meym
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:alnum:] | head -c 8`
23Ac1vZg
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:digit:] | head -c 8`
73652314
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:graph:] | head -c 8`
GO_o>OnJ
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:graph:] | head -c 10`
iGy0FS/aO5
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:graph:] | head -c 50`
;`E^{5(T4v~5$YovW.?%_?9la<`+qPcRh@7mD\!Whx;MJZVQ\K
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:print:] | head -c 50`
fy$[#:'(')jt'gp1/g-)d~p]8 :r9i;MO2d!8M<?Qs3t:QgK$O
[neo@test .deploy]$ echo `< /dev/urandom tr -dc [:graph:] | head -c 50`
6SivJ5y$/FTi8mf}rrqE&s0"WkA}r;uK-=MT!Wp0UlL_lF0|bL
		
		

批量生成

		
for i in {1..10}
do
echo `< /dev/urandom tr -dc A-Z-a-z-0-9 | head -c 8`
done