$ pwgen --capitalize --numerals --symbols --secure -1 20 10
W11e!`Jx7T;=:(;6^>~D
z4rE&kAuk\)reN%k9S9}
:KRkS/rY9}:2/htV\Rt{
&:-q|H0d4hJW{qE=c:M0
P"S..<D;83{7Sn<I\7D:
$o@+#!M]KPr&1&xiYC~Y
Qfhx~TO+A0w[%f2^~Y`j
B:/QuN-ZpeLxbOb|,2p#
d$Uoj(_w5'all>"V)b&0
58P{fqM$mi0^KGw5^D6m
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/