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
Q7eZ]8<0$GNyW57*V=`?
(deAgW~DQJ2P@5bbcXG_
^:0(/+"!N4Psx24zkh9u
g(ztCAbJ"knBz5+p9B}h
Ztudmn8&:"#qQD&G)b+~
Hu-'Wo6<<C,cqJ{4DbTs
qi`]G51x`VP`n~2)N0mE
9u8;M{fOai8O<)-t=.sL
CTnZ0YAbGL]EE{2y^q@$
)}'Nu+P[`[(46kULi%T{
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/