LinuxQuestions.org - [SOLVED] Extract some part of a file with specified time period in it?

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Extract some part of a file with specified time period in it?

I have a log file, which contain following sample entries:

Quote:

10:45:01 This is for example
10:55:04 This is for example
11:00:00 This is for example
11:05:55 This is for example
11:06:05 This is for example
11:07:35 This is for example
11:08:45 This is for example
11:09:50 This is for example
11:11:58 This is for example
11:14:16 This is for example
11:35:34 This is for example
11:40:11 This is for example
11:58:16 This is for example
12:00:36 This is for example
12:01:04 This is for example
12:10:10 This is for example
12:16:35 This is for example

I want to extract only that part of this log file which contain entries made between 11:00 and 12:00 (i.e. for that one hour only, or for any specified period), then how can I do this?

Quote:

Originally Posted by schneidz (Post 4819728)

Code:

grep ^11

Thanks! It helped, but it will return all entries starting with 11.
The problem is how to specify a range of time, for instance, extract log entries made between 11:40 and 12:55?
And this log file's actual content contains one more column at the beginning for username, like this:

Quote:

....
jack 11:07:35 This is for example
jack 11:08:45 This is for example
smith 11:09:50 This is for example
...
...

awk -v t1=11:40:00 -v t2=12:55:00 '{if (($2>=t1)&&($2<=t2)){print}}' filename

Thanks, it worked ;) ;)