$ pwgen --capitalize --numerals --symbols --secure -1 20 10
pmc/paqBq3>M~]3iI&Zn
m#=;<P7"ZH,{Uc:+{R^w
/%[/$>8j(+}'_|IML|"0
p.H3/>4Iw/.b(^X_CIo0
:Ml\m)l:0#Sr!N4F]/[\
'ahxfS04V{M<mY,x.tit
p6r/WIL9WjaKU[%%>q`*
:JoWAh`a=Bw5K-5``U85
3v4"UpdXD`[WceLSg#BD
n]0v!07ax7)/HkOQ[O^W
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/