$ pwgen --capitalize --numerals --symbols --secure -1 20 10
/"svk;N~OTa+'WIJK9yS
V7t'Sroe.ra16ASS"v:w
d78tX){~_;<}m#'2-[A-
K]>%zGX~SP^>[N6-zu(@
E;Ue.uU<i?a^#rW!v,'9
A&WVg]!N2\{I@Il|@QL)
;`A$R\E6P|Y|FQNON1+o
)3:V8wL6Jlz2grCSRw*G
d-1'fURZQsnz'%]<Jvxe
zy'D'sV@.Dywh\W5Gk]e
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/