Disclaimer: in order to keep this post as short as possible, I’m going to be slightly technical. Should you have trouble following this guide, please, leave a comment below: I’ll be proud to help you in an ad-hoc thread 1. The context If you are reading these notes, chances are quite high that you ALREADY … [Read more…]
As you might already know, I’ve just placed three Arduino MEGAs around my new house and I’m using them to –among other things– turn on/off the lights of the whole house. I still have to “enter” the new house so… I’m currently “configuring” the “light-switching” system (associating LIGHTs with related Push-Buttons). After several”upgrades” of the … [Read more…]
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…]
I spent lot of time, lately, investigating the various hardware & software options currently available to build an home-automation system. Such a research was determined by two different factors: the dissatisfaction that I had evaluating commercial/proprietary solutions; the need to design the infrastructure of the electrical wiring of my new house. As for point 1), … [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 system call
[08-05-2015 02:08:33] SERVICE ALERT: srv-*****;dns;CRITICAL;SOFT;2;CRITICAL - Plugin timed out while executing system call
[08-05-2015 02:07:33] SERVICE ALERT: srv-*****;dns;CRITICAL;SOFT;1;CRITICAL - Plugin timed out while executing system call
[08-05-2015 02:07:43] SERVICE ALERT: fw-*****;bind;CRITICAL;HARD;3;PROCS CRITICAL: 0 processes with command name 'named'
[08-05-2015 02:06:43] SERVICE ALERT: fw-*****;bind;CRITICAL;SOFT;2;PROCS CRITICAL: 0 processes with command name 'named'
[08-05-2015 02:05:44] SERVICE ALERT: fw-*****;bind;CRITICAL;SOFT;1;PROCS CRITICAL: 0 processes with command name 'named'
Even tough the srv-***** was a slightly old server, with … [Read more…]
Let’s start from this: if you’re a Linux power-user & you’re owning an Android MTK-based device & you’re wondering how to get root (…and what kind of benefits you’ll have, concretely, being root), this page is for you. I’m the —happy, indeed— owner of two so-called Android china-devices: an UMI C1 smartphone and a Cube … [Read more…]
So, finally, I’ve taken some time, this sunday, to bring on-line this blog. It’s quite some time that I’m trying both a proper way to keep together my tech-notes and, at the same time, to refresh my website. After some (…actually, not-very-deep) search, I ended relying on WordPress. All the alternatives I’ve investigated: TiddlyWiki : really … [Read more…]