$ pwgen --capitalize --numerals --symbols --secure -1 20 10
<*wW9|3/9v~hlenwmQrV
Qr/;5p%R>*nVHesv6^h8
iFQ/K:^80%r.;Tq,!,DI
IEVE?oK2)c'~v#.Z)8Rh
J]^TVRwe\u*Hzf/Jd#j9
S_@qo}b>Tb]|Og7e8V^d
Vg\7I2oX7luZ1#nQ+\\.
Zl>kz6H]A)oc{uIM&S9z
h-oEa*=5FX%w.KQA5<!W
>gfI~Q3Y-TQT|q"d]=a3
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/