$ pwgen --capitalize --numerals --symbols --secure -1 20 10
#Ub9n:P/D\`\ty~0zL^[
^y~{%*Ceuk|-uWaP}w0F
Q^@>,5)ReJ&wa^.)L%cS
vn>YLH/>8WUPN`7I?-R@
Eo<2mJEO.]AR>!CvH+E-
Dw>2$t)Aze8v_ov5ovlh
O#451@}If[8R;xumx>ns
6\^e*y:>@d(aKE^ouZmt
Duwa@d59R&53d}2!<]rF
3p3"fU~J!&qU$GlPE:e\
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/