[H-GEN] Scripting guide

[Kelvin Heng]

hi guys,

I am to write a script to retrieve the IP address from a list of log files, 
and if the IP address matches the ones I need then I will take them out.
But I am facing some problem with the dot (.) between IP address. Can 
someone help me with this?

testfile:
a
aa
aaa
.aa
a.a
aa.

Test 1:
$ grep -w a testfile
a
a.a

Test 2:
$ grep -w "a." testfile
aa
.aa
aa.

Test 3:
$ grep "a.a" testfile
aaa
a.a


Regards,
Kelvin Heng
Have A Nice Day!