$ pwgen --capitalize --numerals --symbols --secure -1 20 10
QhI+,X~nO?nkr$7}k+M.
QH:bjsY%;!{`'f^y06CJ
8S3Cu>4KOC4]TD]pfF-4
\Oh{D3;y]Q^0uG?T&V_[
(3_@>,L@$RKuisX[LISV
%{=YcMv%s)zBW4H~r@'x
sk-?r9\],9>c>h.\^S2\
mt:C:>fXVF4[cg,1!RTr
-Q^wDW'&$SYz<>?k6JD^
0D%*U8eN"2]$fD&=v(Np
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/