$ pwgen --capitalize --numerals --symbols --secure -1 20 10
^am&eYP)"mYe_%}PN1$[
Qb")EMz,G-Fd)4(j6$MZ
I(i2?J4X@@vco$8Hi\YX
"l+e.Tf-+%yH3]UjZ+cJ
)4v(1]nZ(?<^NF,JX{b3
iB%-?uatwkhPQ5fbdy|F
\X.Jq6,pBYZVs&]qqE_>
vcO;ge;prX]Boa79U=-J
T5;IEc|W5pg'RlZaL^F|
dZ1JwCwLP[hG=0`=3:;!
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/