Dig Without Cache

dig can return cached responses because it caches the results of previous queries to improve performance. For the same reason the cache responses can come from the configured name servers. This is useful when you are querying the same domain multiple times, but it can be problematic when you need to check if a change […]

OOM Killer Doesn’t Work Properly [SOLVED]

An out-of-memory (OOM) killer is a mechanism of the Linux kernel that is supposed to terminate (kill) high memory consuming processes if a system is critically low on memory. Unfortunately, the OOM killer doesn’t always work properly. It often starts too late, when the system is already out of memory, so it doesn’t have enough […]