$ pwgen --capitalize --numerals --symbols --secure -1 20 10
{kh86bFG])`%\`3BWN+$
Z=l[T/DH6fSh'oNL@F4X
ctdD.9GokL30HWwU+7";
BHFq2\?`GKrTpTCp"4:z
9-(saIE3>WWq;)NIUM.{
E1<vyl\n"3"PjpJQrsJn
tsR$z"1pd{h/.;:(S0^'
|2=cNv]]w6@z6.fJUp9x
c9T*+B-1OP/z6UD|P9`N
1|mS;4V95-zl2:\KO@"H
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/