$ pwgen --capitalize --numerals --symbols --secure -1 20 10
0FzJ^dfSk)BA]{%PpKYR
",g@]kdm9w{C|e0HNg(U
I>;9$bu8bSG^o_)AdD<t
F]qJ&:WhHr7grj}U[0QT
8PKT.9pOb:&tdP672@4<
v(;.fA&:5o<Ywl882|C$
z"|p1&+e=sB?`'R&d5BL
nl^_\DsWxqK;9XL?9G&K
RI8D-pf`yjw='nQy]Y#I
2e0?>gfWDK3Gq`JfDwIP
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/