online pwgen secure password generator

options: pw_length: capitalize: numerals: symbols: remove: secure: ambiguous: no-vowels: num_pw: columns:
$ 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/