Every now and then, you might need to “recover” from your un-bootable CentOS. I’m not referring to serious and/or hardware problems, like broken HDD or corrupted filesystem. I’m referring to changes in “geometry” of your HDD/partitions, changes in partitions UUIDs, switch from MBR to GPT, etc. etc.. In other words, I’m referring to system changes … [Read more…]
Have I told you that I just got 4 brand-new 8TB Seagate SATA-HDD? Well, unfortunately my RAID setup raised some problems. The first reshaping attempt failed, with the host simply hanging, apparently with something like a kernel-panic that unfortunately I missed from the console, as it was…. blank! (BTW: this is one of the main … [Read more…]
As lots of other people, I strongly believe that a proper backup policy is a mandatory key-factor in every scenario. Unfortunately –again, as lots of other people– I also know that a proper backup policy is hard to implement, expecially when involving serious budget constraints. To be short: for one of my customers, I setup … [Read more…]
I spent some time, this afternoon, to reply a question of the ServerFault community, where Raptor asked: “I enabled the Apache Status page by mod_status module. The process list is very long, and most of them are OPTIONS * HTTP/1.0, which I want to filter away. Is there any tweak, option or flag to hide those OPTIONS … [Read more…]
Yesterday morning I’ve been notified, by the monitoring platform running at a customer site (NAGIOS, actually), that two distinct DNS services (two BIND instances running on two different Linux hosts – different distributions and different bind versions) gone down at mostly the same time: [08-05-2015 02:09:33] SERVICE ALERT: srv-*****;dns;CRITICAL;HARD;3;CRITICAL – Plugin timed out while executing … [Read more…]