Generate random password

dd bs=1 count=32 if=/dev/random 2> /dev/null | md5 | grep -o '\w*'

-5
By: neW1
2009-02-15 23:22:46

5 Alternatives + Submit Alt

  • Find random strings within /dev/urandom. Using grep filter to just Alphanumeric characters, and then print the first 30 and remove all the line feeds. Show Sample Output


    54
    strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 30 | tr -d '\n'; echo
    jbcurtis · 2009-02-16 00:39:28 21
  • -B flag = don't include characters that can be confused for other characters (this helps when you give someone their password for the first time so they don't cause a lockout with, for example, denyhosts or fail2ban) -s flag = make a "secure", or hard-to-crack password -y flag = include special characters (not used in the example because so many people hate it -- however I recommend it) "1 10" = output 1 password, make it 10 characters in length For even more secure passwords please use the -y flag to include special characters like so: pwgen -Bsy 10 1 output>> }&^Y?.>7Wu Show Sample Output


    15
    pwgen -Bs 10 1
    linuxrawkstar · 2009-12-01 14:33:51 9
  • If you want a password length longer than 6, changing the -c6 to read -c8 will give you 8 random characters instead of 6. To end up with a line-feed, use this with echo: # echo `< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c6` Modern systems need higher strenght, so add some special characters: # < /dev/urandom tr -dc '12345!@#$%qwertQWERTasdfgASDFGzxcvbZXCVB' | head -c8


    11
    < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c6
    Blackbit · 2009-02-24 09:43:40 8
  • Generates password consisting of alphanumeric characters, defaults to 16 characters unless argument given. Show Sample Output


    3
    randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;}
    frozenfire · 2009-08-07 07:30:57 6
  • I know there are a lot of random password generators out there, but I wanted something that put out something besides hex. Set count equal to the number of bytes you want. Show Sample Output


    0
    dd if=/dev/urandom bs=1 count=32 2>/dev/null | base64 -w 0 | rev | cut -b 2- | rev
    TyIzaeL · 2009-02-17 23:36:24 10

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loanabilly · 1 day ago

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