$ pwgen --capitalize --numerals --symbols --secure -1 20 10
<l:J=,.|msl5U*(<UfMw
>+jFoD.L"[:j]>K4w2.q
C_z\t(*?JUt-4H<Me?Au
JJtOOoaB53('|b2b8(#L
3_Q?FP)>@l8bP%)qb~]>
(&B*%A-F4;2;K~V!1Ga=
F|yev(t?cj4@J6/>*zt?
2:\U'GB8Mnik3}`WKd]%
o*[?3"-w`nV10Z?T>l6,
A=cOx1I,,SOqhk,C42Kw
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/