$ pwgen --capitalize --numerals --symbols --secure -1 20 10
1D8QX?$-soW`ksP@P=E$
$LXe89&rkYh;1@nJHD#i
<x{%w+@37E>\L5'W-'jR
->lzEpPDqc~XCBfi2T"Z
dZ6jWPghpa-:Yc^Vn.c-
de1Q)DAxxQ~3G2zc:CjZ
$!tc31P~lgP)D/,k#5BN
*X;93.I#]R=Bz2Oia.7E
e&`o1RY%x'M<A|'T`y~/
gG,*+Mu"t7NR+cT=%m\!
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/