$ pwgen --capitalize --numerals --symbols --secure -1 20 10
yQ{5>a#1`pk~9:tW%%@M
Y1B/?*=?O)A&aplRn6P6
\{v[~yZ6O<c"p,;sCERq
(7\`IFUj=_-WQ]UhAYg3
eH1BNp;!GDLE3]}bQlPK
*GA$2.jX*]IY8z[JG56J
Bn#>gtvLRQ4yvL$f%(yB
B'Z;h[Z2>v6;h6\0e"[~
LDTwrisT:f#1q!vCJ7,-
z6a5x^dnJpX8)|FA]B"P
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/