$ pwgen --capitalize --numerals --symbols --secure -1 20 10
:S8<2?%8h0@'n)u0LgG=
}5+Vur4+soMjVGvrIaBq
C/s9`lg}`*9~tW"NQvHP
zDbk?v)2zy1Yb+58YMp>
C<]R>a,,p6q*t'wtzZCB
\Z8?ahx;J%Y~.A3~S$1y
;AB?=z~I_'`xm*0L_,?"
;Yw`H9U~RBEf}w]C`ME5
!}2BG=Xe4'fx~'ET1AwO
K;f86RE=lQtW:Ln9G=Jy
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/