$ pwgen --capitalize --numerals --symbols --secure -1 20 10
}/~6vE<18LVT|?Oj?t7H
&q&fwJ$\>}=9|+=[VoVI
qK3j1%Qv^x5eGUw_UeVZ
)._y_1BP|7_7"s>u%G[O
ThaWjo'n\iPosy{}8-dI
v\a|k6WR]i5Om-#C(!1A
|,($8GI/:AwFb*E3=K|,
~Lbq\'R^x2#sTy-~]SJV
w3"8_<_]cTs+q}@t9r*c
,-ssHE$0.fS%f3Y0[3E:
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/