Need a regex

Shell Programming and Scripting
1

Hi,

I am trying to grep for the following type of string from a document given below:

12637 1239 3356 12956 7004 7004 7004 13381 13381

*>                  12.0.1.63                              0 7018 21872 ?
*                   208.51.134.254          53             0 3549 7018 21872 ?
*                   202.232.0.2                            0 2497 7018 21872 ?
*                   134.222.85.45                          0 286 3549 7018 21872 ?
*                   202.249.2.86                           0 7500 2497 7018 21872 ?
*                   209.10.12.125         4103             0 4513 13789 3549 7018 21872 i
*                   216.218.252.164                        0 6939 3549 7018 21872 i
*                   203.181.248.168                        0 7660 2516 209 7018 21872 ?
*                   64.71.255.61                           0 812 3549 7018 21872 i
*  12.47.220.0/22   193.0.0.56                             0 3333 3356 7018 21872 i

There could be any number of such numbers in a line. I am a little confused on writing a regex for this. Could someone please help me out?

[0-9]{1,6}

looks ok for a single number but how do I do that for repetitions of such numbers?

2 
grep '[0-9]+ [0-9]+ [0-9]+ [0-9]+ [0-9]+ [0-9]+ [0-9]+ [0-9]+ [0-9]+' FILE