$ pwgen --capitalize --numerals --symbols --secure -1 20 10
{iNq-4hbX.NhGJSK~m%S
Qk'6V#_4M,9x!y[7?&=7
`k=aSV?b2&|Q+XWbbxrA
]pi!tW1x)}[;2R4A&zFW
HQF0+FemQ''rt6BDBeqi
fM~ON$JF=sL}t-|r!n4F
O\t3a~*i}Yb;;"gwqzW4
Z8Ufg!8A?p,vc\Kvmf,B
0{f0:U]n]E1sBhE&RzXM
m0"7GUxi?N6,/i[J=NLx
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/