$ pwgen --capitalize --numerals --symbols --secure -1 20 10
34<$(&z8UZGJ3L)F)6+U
8EhlOol#C2hoW]1O4@r{
`t)GawKmN{"7v:DY3=ic
uW*j5b~Rx)a#d0b&dFvF
5N|x56I*H]8BvwWYMF7{
`mnHPde8:|(%=oX(p0:?
_V;Z9bLNj6r]2{'$+O81
fUDH:!D9Ej8(mM&8&:!W
$+BDHqS0<$@b1y>xD5!X
b!JEcf%Dj1X!=a.GL$-[
Usage: pwgen [ OPTIONS ] [ pw_length ] [ num_pw ]
Options supported by pwgen:
-c or --capitalize
Include at least one capital letter in the password
-A or --no-capitalize
Don't include capital letters in the password
-n or --numerals
Include at least one number in the password
-0 or --no-numerals
Don't include numbers in the password
-y or --symbols
Include at least one special symbol in the password
-r <chars> or --remove-chars=<chars>
Remove characters from the set of characters to generate passwords
-s or --secure
Generate completely random passwords
-B or --ambiguous
Don't include ambiguous characters in the password
-h or --help
Print a help message
-H or --sha1=path/to/file[#seed]
Use sha1 hash of given file as a (not so) random generator
-C
Print the generated passwords in columns
-1
Don't print the generated passwords in columns
-v or --no-vowels
Do not use any vowels so as to avoid accidental nasty words
https://sourceforge.net/projects/pwgen/