$ pwgen --capitalize --numerals --symbols --secure -1 20 10
hy:0U"a^}mBkYR~"H.J.
jugsK$t"`MW_(77uaBlm
\<-N*u.q\1O.51w`'+Vm
Tu|Jd>m`e8r>-~Lpf*Bb
}K<ni>P%auV73t?rg{y*
3a/sv}"O^%KW]/E@L]e6
!b`VKA5*_>Wl}{ja(~.^
;mjlA1bxq:[}U58)Y.i%
YKXp]\%l=7T.f=~_U2:1
N9<B@RoUf;i3W4$(Ol/D
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/