$ pwgen --capitalize --numerals --symbols --secure -1 20 10
Z,8sq}Ge+(([W6Gub`B9
&L\%B!/3_|W!\+!9KpK$
N3U>Hy@-oqiSHqfU0%Jb
K].7QV%&cT|'Ry_}geuH
7:%t8jFQYymM<l0`YG]X
~j*,k^l6sc^uc@45Kgj?
+XXg^SuI#)wN5pH;@P'w
b:_-;JU*MgO.Op9Suy2K
P'D-h#ah+7-MaHy'nrXt
;qj(2|!/IB^/PHtT+x:r
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/