"A random password generator" (via http://www.commandlinefu.com)

gistfile1.txt

# http://www.commandlinefu.com/commands/view/13641/a-random-password-generator#comment

tr -dc '\x15-\x7e' < /dev/urandom| head -c 16 | paste

#

cat /dev/urandom | tr -dc A-Za-z0-9 | head -c 32

# 便利:)

gistfile2.sh

passwdgen()
{
  n=${1}
  cat /dev/urandom |
  tr -dc A-Za-z0-9 |
  head -c ${n:-8}
}
 
# passwdgen
#=> BpU2a8kM
# passwdgen
#=> uEv8HD8I
 
# passwdgen 32
#=> 2IKd3tfogc01MjcNIus9dFJaR4yZ3BID
 
# passwdgen 1
#=> H
 
# Very Yoi!!