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 $ for j in $(seq 0 255); do for i in $(seq 0 255) ; do seq -f "10.$j.$i.%g" 0 255; done; done

Jan. 16, 2013, 11:53 a.m.EvaggelosBalaskas

Explanation

Using two for loops to create second & third block of IP and finally through a formatted seq to printf the output.

More efficient/using less memory than using {..} (range).

Limitations

seq is not available by default in some systems.