$ pwgen --capitalize --numerals --symbols --secure -1 20 10
1"rS)hBcq<e\R_/O';+~
N)k~K+tG\}8Y0RX,g3[&
p$EyA,9@`A5#tE\c0)_d
.EqS"M8,W.I-H;x49=K$
vgr_7D(tiYj_kb8.79IS
U@cr'>*^WIP&U-^A/45=
?-g[g~lS|TSP+62F]hd+
g`z7t{5,eX-g!$~C\IdJ
uYrQEu&@*3;q99rv1\[4
|KlL6;Fcd3(KjJa.WvQ%
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/