https://systembash.com Technology and System Administration Fri, 07 Oct 2011 14:45:01 +0000 en hourly 1 https://wordpress.org/?v=6.3.1 https://systembash.com/wp-content/uploads/2023/08/cropped-icon-dark-bg-32x32.png https://systembash.com 32 32 https://systembash.com/fixing-ip_conntrack-bottlenecks-the-tale-of-the-dns-server-with-many-tiny-connections/ https://systembash.com/fixing-ip_conntrack-bottlenecks-the-tale-of-the-dns-server-with-many-tiny-connections/#comments Fri, 22 Oct 2010 21:06:23 +0000 http://systembash.com/?p=822 PowerDNS, which has been great. It is a DNS server whose backend is SQL, making administration of large numbers of records very easy. It is also fast, easy to use, open source and did I mention it is free? The server has been humming along for years now. The traffic graphs don't show a lot of data moving through it because it only serves DNS requests (plus MySQL replication) in the form of tiny UDP packets. Read on to follow my story of how I fixed this tricky problem. No kittens were harmed in the writing of this post. ]]> https://systembash.com/fixing-ip_conntrack-bottlenecks-the-tale-of-the-dns-server-with-many-tiny-connections/feed/ 1 https://systembash.com/linux-command-line-generating-a-random-file/ https://systembash.com/linux-command-line-generating-a-random-file/#comments Mon, 01 Feb 2010 01:53:41 +0000 http://systembash.com/?p=581 https://systembash.com/linux-command-line-generating-a-random-file/feed/ 1 https://systembash.com/tweaking-tcp-for-fast-100mbps-connections-and-transfers-on-linux/ https://systembash.com/tweaking-tcp-for-fast-100mbps-connections-and-transfers-on-linux/#comments Thu, 24 Dec 2009 01:26:24 +0000 http://systembash.com/?p=516 https://systembash.com/tweaking-tcp-for-fast-100mbps-connections-and-transfers-on-linux/feed/ 5 https://systembash.com/a-poor-mans-vpn-proxy-web-connection-to-remote-server-via-ssh-and-tunnel/ https://systembash.com/a-poor-mans-vpn-proxy-web-connection-to-remote-server-via-ssh-and-tunnel/#comments Fri, 16 Oct 2009 13:12:20 +0000 http://systembash.com/content/a-poor-mans-vpn-proxy-web-connection-to-remote-server-via-ssh-and-tunnel/ https://systembash.com/a-poor-mans-vpn-proxy-web-connection-to-remote-server-via-ssh-and-tunnel/feed/ 10 https://systembash.com/command-line-packet-sniffing-existing-running-process-in-linux/ Tue, 21 Jul 2009 13:57:23 +0000 http://systembash.com/?p=398 https://systembash.com/error-while-mounting-an-iso-image-in-linux-ioctl-loop_set_fd-invalid-argument/ https://systembash.com/error-while-mounting-an-iso-image-in-linux-ioctl-loop_set_fd-invalid-argument/#comments Wed, 17 Jun 2009 01:18:47 +0000 http://systembash.com/?p=383 https://systembash.com/error-while-mounting-an-iso-image-in-linux-ioctl-loop_set_fd-invalid-argument/feed/ 3 https://systembash.com/easy-search-and-replace-in-multiple-files-on-linux-command-line/ https://systembash.com/easy-search-and-replace-in-multiple-files-on-linux-command-line/#comments Thu, 07 May 2009 03:10:57 +0000 http://systembash.com/?p=365 https://systembash.com/easy-search-and-replace-in-multiple-files-on-linux-command-line/feed/ 15 https://systembash.com/using-nice-to-control-cpu-usage-and-process-priority/ https://systembash.com/using-nice-to-control-cpu-usage-and-process-priority/#comments Thu, 04 Sep 2008 00:01:46 +0000 http://systembash.com/?p=228 https://systembash.com/using-nice-to-control-cpu-usage-and-process-priority/feed/ 1 https://systembash.com/installing-logmein-hamachi-on-the-nokia-n800-to-join-your-pvpn/ https://systembash.com/installing-logmein-hamachi-on-the-nokia-n800-to-join-your-pvpn/#comments Sun, 16 Mar 2008 00:45:22 +0000 http://systembash.com/content/installing-logmein-hamachi-on-the-nokia-n800-to-join-your-pvpn/ https://systembash.com/installing-logmein-hamachi-on-the-nokia-n800-to-join-your-pvpn/feed/ 4 https://systembash.com/adding-memory-swap-space-to-the-n800/ https://systembash.com/adding-memory-swap-space-to-the-n800/#comments Sat, 08 Mar 2008 22:31:48 +0000 http://systembash.com/content/adding-memory-swap-space-to-the-n800/ https://systembash.com/adding-memory-swap-space-to-the-n800/feed/ 3