I have a log file which has first few characters of every line as a timestamp.
2010-06-01 04:56:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 04:56:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 04:56:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 04:56:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 05:22:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 05:22:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 05:22:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 05:22:02,802 DEBUG
{Thread-27} Some text message
2010-06-01 06:43:02,802 INFO
{Thread-27} Some text message
2010-06-01 06:43:02,803 INFO
{Thread-27} Some text message
2010-06-01 06:43:02,804 INFO
{Thread-27} Some text message
2010-06-01 06:43:02,804 INFO
{Thread-27} Some text message
2010-06-01 06:43:02,809 DEBUG
{Thread-27} Some text message
2010-06-01 06:43:02,809 DEBUG
{Thread-27} Some text message
2010-06-01 06:43:02,809 DEBUG
{Thread-27} Some text message
2010-06-01 07:08:02,809 DEBUG
{Thread-27} Some text message
2010-06-01 07:08:02,809 DEBUG
{Thread-27} Some text message
My aim to find all such lines which have the timestamp of 1 hr before the current time.
How can this be achieved?