$ pwgen --capitalize --numerals --symbols --secure -1 20 10
vJ#HE(Hi56?)eXhJB_{!
El'9?=xNSSq4|fx>Se+D
<oPIt_F)bG@,7x}ES-nz
COiT<!PJWp.&s6K[b@<+
o;Y()U*cj`]]fxlb]4~O
VqC1)b{2OV|==AVQ]Ad@
r?7=gj@F<`sRdTm$/8Zt
A*J8RF]LoHvYE"0:2j;A
!Qj7CtO;9O(4^+j~#V%H
[m,0NmWbv.l\FQ^#F*'a
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/