$ pwgen --capitalize --numerals --symbols --secure -1 20 10
0/H4W&^5@o=<}^&z0J$H
-!M"%~ua]raV9v7,^9?X
J2I1\>[{j@w3`lY*0"Nq
x'`p$GH1w`2~:b8P9$vD
k/-u"48BM6<%_0,R/cEA
k@S2)`FV'ZGF+vXa#AN{
llpcwxn:v@p?wK~g5U8R
ADc*c!54j^7me~1uB(Id
L!{a.I.,+7y"R8O(iXxh
N,WRF{=oeyF]-B_lW6Vb
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/