$ pwgen --capitalize --numerals --symbols --secure -1 20 10
ro2!lP)eCY(V7c|~Fx{A
PqwB5a$0yQ|s<m^(v!<e
<LJt*I,aI$1@kH^-&Z^&
A|5.ZWdic9I/qg{k\)4l
~N"Zz}c<4Pt_W==|u|nn
EW:`2IC^*)>:QTZl#ye$
G.a,4)6r^VPR#LOa4K&V
c!0l,!I?/Qb~FR"5BX@A
8Cv(Dthi:Qr1{:U3yev)
+q(8QgE;Bjvn8P>Q]FS{
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/