$ pwgen --capitalize --numerals --symbols --secure -1 20 10
HHO9PI-\uTAQt&'&ii:j
C<|D#]mv`w$i85Y!U.=<
X{uQ4_LEDb?_m"6:);v'
?s;27W:I"S0B4\+Dw9YA
e;a=82P$K9y.^gd#{DXs
dw1'brGIvhHhXlvmyVev
1-gOK[#\:p`.v!OFYxZy
KQ[4;w$9+;8s`^$+o.#C
/iqTbMxkS_4yP=\6z+.%
cOd*`L7HT%J=2<iEiF)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/