$ pwgen --capitalize --numerals --symbols --secure -1 20 10
yMED2+X#6eJU1;QRiP0@
KFHP\aQ.#Ro{v{ewq0Uy
{|\w/d4$3$.,x6UDCljA
FN\dMOYs.i3Xvd/}/<g$
v5za}b]uherOoR{Cl_\S
RZ|_:=`;Y](R@3yl*UBR
9vR,B-k1YW;dDQ?Ax`A~
XhqlA-W2T^RWQ>o8'gEU
R]^P*3@GS|6UIC%<S"y}
~rKZOZ;>r^4OPfIE3@Y]
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/