$ pwgen --capitalize --numerals --symbols --secure -1 20 10
XJJSA8Y;C@g%LF(y1wP'
A/$e:ehsQS0`h{CS"w.X
1nA~0YUuMpYwNE_L{.j@
5^n^7cMk18`k2ZFebN,h
Jv<oi|-&~/l>1sKL"&kZ
'jsW!U'o6?DU9f0Q?^9y
rg{qW\!#0w?4oF02W#lg
3X\cS;YmO\Gwp)UT/9yF
AMoV9l&t8T^e4W"jq%&E
_,C7(#\:Zg~hb'x^}[9u
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/