$ pwgen --capitalize --numerals --symbols --secure -1 20 10
#qz\|2,.<GsWgl^<yuTg
F:>fF-@VE$XZO[$O,F6V
{e([?Q,U1l*D)JX=?>,@
/t/m1w]}VYp>!K(&[+OG
GAH^X1yv};Ij'K}T`PDB
>7"/~[w$p4U]pf|=,U>y
D+vb\Wtkq3HUTv!Vh1XL
_KEf`}]>/jg]}9Usl?VV
9-dj~8mss\i-".q2%A$k
J&LYwhZ>OB8dFdDb,V7X
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/