http://k3mist.com Development, Design & System Administration Sat, 12 Sep 2009 15:40:34 +0000 http://backend.userland.com/rss092 en When upgrading the fglrx driver, don't get lazy about removing the previous version. Besides the old configuration possibly still in use after a reboot, you get serious memory leaks in Xorg caused by the ATI Catalyst driver that resemble the same leak you get when using the driver provided by ... http://k3mist.com/linux/ati-catalyst-9-9-fglrx-8-650-installation/ An issue I recently encountered with some mail servers was poor MTA reputation. Even though the servers were only used for corporate email, somehow their MTA is poor at senderbase, even though none of the IP's are on a single RBL/SBL. This is partly due to Slicehost having bad IP ... http://k3mist.com/linux/posix-catch-all-the-proper-way/ After switching from windoz to Linux, I immediately started using Evolution Mail after being an Outlook user for many years. Evolution in many ways is better than Outlook besides being free, but there is a small issue. Sometimes, somehow and someway the client loses sync with folders and this little bash ... http://k3mist.com/linux/evolution-mail-2-26-1-not-deleting-trash/ ATI has made a change in their fglrx catalyst drivers (9.5+) where setting the gamma in xorg.conf no longer works and is ignored when starting. In my previous post I went over setting and making these adjustments. The previous methods for Contrast and Brightness remain. However for gamma, the only way ... http://k3mist.com/linux/adjusting-contrast-brightness-and-gamma-on-fglrx-95/ The following iptable entries will prevent and block repeat failed connections, but not permanently. This allows two new connections every 60 seconds. This is an effective way of blocking automated attacks you will see mostly from Chinese ISP's. iptables -A INPUT -p tcp -m tcp -m state -m recent ! -s ... http://k3mist.com/linux/howto-prevent-and-block-repeat-failed-connections-to-ssh-with-iptables/ From terminal, execute the following; sudo modprobe ip_nat_ftp ports=21 sudo modprobe ip_conntrack_ftp sudo iptables -A FORWARD -m state --state ESTABLISHED -j ACCEPT sudo iptables -A FORWARD -p tcp -m tcp -m state --dport 21 --state NEW -j ACCEPT sudo iptables -A FORWARD -p tcp -m tcp -m state --sport 20 --state RELATED -j ACCEPT sudo iptables ... http://k3mist.com/linux/howto-allow-outgoing-ftp-connections-in-iptables/ If you're having issues with fullscreen video playback, this may help. The issues may range from hard lock's and crashes to poor performance and flickering. The flickering issues may not go away with this tweak, but performance should be better and crashes should stop. For starters, GStreamer should be installed. There ... http://k3mist.com/linux/fullscreen-video-playback-jaunty-904-xorg/ This is a small script I wrote that automates creating a directory for the mount point and then mounts the nfs share on that diretory. It also accommodates removal when needed and unmount's the nfs share and removes the directory that was created. Notes: Caution: The script assumes the nfs share is ... http://k3mist.com/linux/bash-script-automate-mount-unmount-nfs-share/ This is a quick guide to creating an ISO/Disk Image on Linux from your DVD or CDROM drive. Insert the dvd/cd into your optical reader drive (obviously ;p) If it is automatically mounted, you will need to unmount it. On my laptop, my dvd drive is /dev/sr0. To figure out what device ... http://k3mist.com/linux/create-iso-disk-image-from-dvd-cdrom-on-linux/ Memory leak fixed on my sony vaio laptop with an HD3400 series. NOT completely, xorg will still leak over time (about 60mb over 8 hours and I think some of this memory is re-used for effects which will not increase the memory any further when opening, closing, etc). The change ... http://k3mist.com/linux/xorg-memory-leak-fix-for-jaunty-904-ati-proprietary-fglrx/ After a few weeks, a patch has been released a few days ago that fixes the fglrx lag when minimizing, maximizing or opening a window on ubuntu jaunty 9.04. The lag was severe freezing the entire desktop for 1-3 seconds, almost making desktop effects unbearable to use. For those who would ... http://k3mist.com/linux/ati-proprietary-fglrx-minimizemaximize-fix-for-jaunty-904/ If you have the ati driver installed correctly and have xorg setup correctly, you can easily change the brightness, contrast and gamma on linux. I could not find anywhere on google a single search result except for setting gamma, so I post this here. To change brightness and contrast you do this ... http://k3mist.com/linux/contrast-brightness-gamma-linux/ To start off I am no expert. I am a windows convert about a week ago now. However, I'm grabbing Linux by the horns and loving it! The reason I am posting this is because it took me several hours to figure this out. I could not find in one place ... http://k3mist.com/linux/ubuntu-jaunty-ati-restricted-proprietary-fglrx-driver-direct-rendering-mobility-radeon-hd-series/