$ pwgen --capitalize --numerals --symbols --secure -1 20 10
KJ;qJ74e87Qj<a~1EDZN
k$zuz`}%|s!FLP+m"@4`
VU:RG0AcPf>ZZq}A%ENR
pH)M1#usG5@C=+ZuBpQA
5}h_01kF+f%bG_*%i9]0
^zh?<e_&g\{y4$VEwlno
Y(*-tbIkI9)%#nHK![Iv
`[N>{$3~1qFdc9W(+wK"
CPGH'{e1fBG"X"xS!l(8
`b\BG1K%m0@M[ruH{bx'
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/