$ pwgen --capitalize --numerals --symbols --secure -1 20 10
`KbM4T{G~(`wch4y/L&w
3cT7dT0,R&^K=sm8ilNZ
p`w*?s68MZ@j">ZQv0Q"
xz.3fzTdYyT[G;O[]xs,
Ix1$na2R{91QiA2QMe0[
sky=SGgHc-+K`RnA+L9,
+m@Tu}g,q<.?anUj6tH&
[Xc2s'{}pT:]::8nNG|b
ZLB4SXz,l3m~67V(7*{Z
LS9gOh7Rp5c8<&;#SzG=
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/