$ pwgen --capitalize --numerals --symbols --secure -1 20 10
i1Q}YDTssB=b^<+22nJ2
7}F!$-.:sFojDaG$n$J!
j]2h^\,z{i!<Tj3r"'l+
l\2xTbe!wP&sMPY[nmAy
eq7$[9*WQJb\9^T84w\m
!fZNa3V/=Numo3c8gI&G
GyC&|m~ikj`8tYig+?S)
0ZiPXx^PB8Vut'd3jJ^H
McZ&A*a}Q3BuL/\U)}7O
}m\r{XkUKg3Cm+<!0Ko$
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/