$ pwgen --capitalize --numerals --symbols --secure -1 20 10
%y?;![2UUQKMU;c[t^\s
n:O53~jrG`A&V:x"ya$&
%t;2j6)KoD:B>_'(Aj:q
b<|+:^kh.U`B0|(]oG=n
5^Q"x1?ta,qb#j({OqSm
!;et&_3V,c0-i+:CwDMf
~&e|A18tDa|4|cYKQ1z[
fu0),i!cBi@{`<R9ds^v
+<kcu3<=&b\u\eZN:yZ_
Y"+tpB(p0zZvxW=UuqQY
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/