$ pwgen --capitalize --numerals --symbols --secure -1 20 10
v{=+<d8w15q,fX;0k{nr
d5/vf+7@^p+(E|nV5}>x
fm*09K2&h:P@afR&3}dB
>X>OyzS>i#s:>I1WoUch
{#9"a[jFL6_pdJ%E(uj{
A#'#=nRw?0[woV8i6RHy
k'Ce^"";4>&#po8.L{ne
tx5\NP'ViQ5w-w{)-8Rb
q{F((Es$ZG2c{l8Ywh-Y
o`9>[oJCx?coD!mC2g#(
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/