http://melnikov.net.ru Thu, 13 Nov 2008 09:43:00 +0000 http://backend.userland.com/rss092 en Shutdown your UPS monitoring software. Contact your UPS directly using some terminal program such as minicom with the settings 2400 8N1 (2400 baud, 8 bits, no parity, 1 stop bit). Be extremely careful what you send to your UPS as certain characters may cause it to power down or may even ... http://melnikov.net.ru/apc-smartups-battery-calibration/ Now i'm migrating from Windows XP to Ubuntu Linux. For some time I will need both OSes to work with minimal time to switch between. As solution, I decide to setup VirtualBox on Windows, and run Ubuntu inside virtual machine. This is quite common situation, but one detail is specifical: ... http://melnikov.net.ru/virtualbox-raw-partition-access/ By default (on Debian system) Xen uses ttyS0 as serial console, and that causes conflict with kernel module 8250.ko. I personally met this trying to setup 'nut' package for UPS handling. The solution was found on XenSource page. Actually you just need to add # xenkopt=xencons=ttyS16 line to /boot/grub/menu.lst, do ... http://melnikov.net.ru/xen-and-serial-port-problem/ Now I am on Sun Tech Days at St-Petersburg. Just 10 minutes ago I win the Solaris book authographed by Ian Murdok, creator of Debian Linux, currently Sun employee working on Sloaris), who is one of the speakers of this event. The site of the book is here. Wifi coverage ... http://melnikov.net.ru/sun-tech-days-i-win-solaris-internals-book/ Oftenly network services give away information on what platform thay run. If you look what SSH daemon replies on your telnet request, you'll see string like this probably: SSH-1.99-OpenSSH_3.8.1p1 Gentoo-8.2.4 It is obvious that as on of security measures it is good idea to may harder for attacker to gain any information ... http://melnikov.net.ru/sshd-hide-daemon-version-and-os-info-2/ Today I was in need for simple solution for remote desktop access that user could setup with minimal troubles. So I remember UltraVNC-SC. I spent 20 minutes to read docs, create executable file and setup firewall. There are some problem with speed and connection was lost one time, but i'll ... http://melnikov.net.ru/remote-help/ This is the text of simple plugin that hide real Wordpress version number from evil eyes. Don't treat it like the single security fix for your Wordpress install, it's just one simple step in security process. So, the source is right here: < ?php /* Plugin Name: MNR Mask Wordpress Version Plugin URI: http://melnikov.net.ru/ Description: ... http://melnikov.net.ru/mnr-mask-wpversion/ Some time ago I noted the same problem on Debian hosts having root file system on software RAID. After each kernel upgrade Debian cannot boot, complaining on inaccessible root FS. As I figured, the problem was in generating initrd.img for new kernel. So, after each kernel upgrade it was necessary ... http://melnikov.net.ru/configure-automatic-initrd-creation-for-software-raid/ Today I restored part of this blog from backup. Post dates was changed in process of categories-to-tags conversion and some other corrections, but I don't mind. Also I set up new template (White as Milk), just to found that it needs some amount of work before it will shine. The template ... http://melnikov.net.ru/blog-mk2/ Serial ATA in Linux: Jeff Garzik (Linux kernel libATA developer): Serial ATA controllers support status and more.. LinuxMafia: Serial ATA (SATA) chipsets — Linux support status Some notes about hardware-RAID SATA controllers. Some more info about hardware-RAID SATA controllers. (Resume: buy MegaRAID SATA 300-4X (or 300-8X).) http://melnikov.net.ru/serialata-software-raid-1-and-lvm/