$ pwgen --capitalize --numerals --symbols --secure -1 20 10
Mxhrf@1bkDMD[?HdN*YT
'o)~6L9"&N^eelfF;4dY
t*d2Nxan3E%v~=*j;sE,
ZOM^~mQP9z>Qkp.=(kvP
6P\'I5/J@].N?S6HcI/>
3@0qssJ5SR.?"A(=<R?/
gC/ebbPi]q)(7vy(|Z`$
WRuMVw]YVf*]5~b1qfpT
+ue~bRUQdx9yQFg%GeSt
]NHq\m@"))ot_T9M^Xvp
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/