$ pwgen --capitalize --numerals --symbols --secure -1 20 10
?p:jY$<2qruVdxe}O&:u
m{5MlKTl+P+gJ}(_Jq>E
/Y/m`iA+,</,m3ze~K>_
c{3R:v?_#q9cUUJ6:.kR
/?8i(S=A\*iTP<C.b%M$
O%;!!r(x48>!oTOeWu-R
4"_qb4$N0wSNI=7fH*s0
Y5<X!'KaPbo^w3{eu${+
\m=H>)U4h1L+K2+f^IMx
:P&sZ0KRC|4mTJ[qyOY6
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/