$ pwgen --capitalize --numerals --symbols --secure -1 20 10
bpIs^CA%Wd%K)^-C(km2
'~~kMPx3mGs^#`%90+]t
2|2C~bTCY4`W:0W+%-)`
L=jpJLkN3pv@ct.:*j#(
;s(KEu,<'S5*77]'N]F:
"3"8EwmNd:ZRu)l]A(5a
3.6!&rv`|E+q.OR9/Y{}
#/uzy\E[P[h-HGm4V8!W
B-/L/.f(FS.*]K98\S1a
-N`qC5:Opqiy"j32%21x
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/