$ pwgen --capitalize --numerals --symbols --secure -1 20 10
7%!$3\2w,f.y7TtD\M-9
-~vX-\9nG?O3wY7ydB@&
smZe3J#S#LA)\/-4QfU_
Fm~bu4nutlk)aR;(RC6$
9J%G*k3=P]3Lw&pt7{,e
\F1(%&W"B("aTOMn(|_&
daW4Fk7R(?z(H.6z#N~Q
9^bBE^2`YXZ6hO_OPoQ!
oG!LORZ6k9'\XBdtK<&;
"7M`L@87N%638A$[:1Ip
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/