$ pwgen --capitalize --numerals --symbols --secure -1 20 10
&by['d/K54N_IO[#ys^q
=Y(K(~1LXZgH5_lW?(qw
:-{|>2.'Y:~f9J{^7,4G
Yl7DFrsMLXET^"4^|G3)
!kmB!_=nsivn1:"][kld
N'M5Y.spTT>?k%'u4b~c
f&0{Tg$Hz)@5COOg]Ud6
`Fr]XDf(5PAESI3[i&AQ
,]m&{Re-1&mGWPdD_fsS
s({7n8i'YWg>B7QZWpVt
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/