$ pwgen --capitalize --numerals --symbols --secure -1 20 10
pGh|#`fK#;2nh"=T{dU|
bt,A,mo/R"VS--0$dNnD
*UmBIfJEb0^(J`|ob~G3
5`tw+'fyw2a{IT'{lZ}J
@xV/8)-\/8Q(hfh|;M)B
)#*mzuD@1SLO6{hqe.6a
P,I!!J'Za!0&Bxq4(<C4
`',$$~R$*c}m63G?:|G*
,B:*.^#Zr1n@9CX["\Iu
s~ia~ed0lI-0v{y~B@hB
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/