$ pwgen --capitalize --numerals --symbols --secure -1 20 10
oOS%w.7>#;L)rA$gJs'}
T;FjPApC8FHgO)2f98';
\TH|`I'jRj]O2U=Feqt:
(B'SlN@N(AB4x*CaQ^3{
8>psyIiqJJ5v3%5y;r)1
aNZ?KWoS&_wz-HN@uD&3
YkY(&vKrUi9y+XW:}#>?
)G-O8`}#YWV<j1nAV=L@
jf|LFkl>rJa_\LQ7a9|.
@7fb2qCXp%7^UbPHpNc#
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/