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I have a server running CentOS 5 and when yum update is run and a new kernel is installed and there are more then 3 kernels installed the oldest ones are removed. Anyway to achieve this with CentOS...

I use something like this in perl to get the date and time:
use Time::localtime;
use Time::gmtime;
$tm = gmtime;
$time_str = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
$tm->year + 1900, $tm->mon +...

I have a large file that I append entries to the end of every few seconds. Its grown to >150MB. Its basically a log file but a perl script is writing to it. I need to make a copy of it to a new...