Usage: ./geoipgen [OPTION]... [COUNTRYCODE]...
IPv4 network tool for generating geotargeted IP addresses.

Features: Random or sorted order, unique or repeating ips, skips
broadcast addresses, uses MaxMind GeoLite Country database.

Target:
        COUNTRYCODE     One or more country codes, delimited by spaces
                        Use 'all' to target all country codes
                        Use -l to see the list
        -n NUM          Exits after NUM IPs

Unique or repeating:
        -u, --unique    Return each IP in the countries once only (default)
        --repeat        IPs can repeat with random order

Order:
        -s, --sorted    Order is sorted, ascending
        --random        Order is random (default)
        --less-random   Order is random seeming, returns each IP only
                        Provides significant performance gain when used with 'all'
                        countrycodes

Other:
        -h Help         This message
        -l, --list-countries  List countries and their country codes
        -c DIRECTORY    Location of GeoIPCountryWhois.csv database
                        Default locations: ./, /home/dc/.geoipgen/, /usr/local/share/
        -V, --version   Print version information. This version is 0.3
`
Examples: 
geoipgen nz             Each IP in New Zealand in a random order without repeating
geoipgen nz au          Each IP in New Zealand and Australia in a random order without
                        repeating

geoipgen --repeat -n 100 cn hk mn tw mo jp kr kp
                        100 random IPv4 addresses in Far East Asia.
                        It's faster to produce non-unique IPs with --repeat

geoipgen all            Produce each IP in the world, once only, in a random order.
                        Defaults to use less-random for lower memory overhead.