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Enable the query cache in MySQL to improve performance

If you want to get optimized and speedy response from your MySQL server then you need to add following two configurations directive to your MySQL server: query_cache_size=SIZE The amount of memory (SIZE) allocated for caching query results. The default value is 0, Like makeup order would began was and my […]

How to Disable IPv6 for Redhat and Centos

Some applications or policies require that IPv6 be disabled on the server, since the IPv6 protocol is currently not a requirement. This article will explain how to disable IPv6 for Redhat (Rhel) and CentOS based Linux servers. Disabling IPV6 Log into the server via SSH. Verify that IPv6 is indeed […]

Fixing Listen IPs In IIS (The network location cannot be reached)

When you run IIS sites long enough, you might eventually run into the following problem when trying to start a new or already existing site in the IIS manager. Error: “The network location cannot be reached. “ The most likely cause is that Host Headers for that particular site are […]

HowTo: Creating Firewall and Cluster Objects In Firewall Builder

Here I present an abbreviated explanation of the process of creating firewall and cluster objects. More detailed step-by-step guides are available in sections “Firewall Object” and “Cluster Object” of the Firewall Builder Users Guide. As usual, to create a firewall object I use main menu “Object/New object” which opens a […]

Linux: 20 Iptables Examples For New SysAdmins

Linux comes with a host based firewall called Netfilter. According to the official project site: netfilter is a set of hooks inside the Linux kernel that allows kernel modules to register callback functions with the network stack. A registered callback function is then called back for every packet that traverses […]

services that are not necessary on a web server

These are some services I would normally turn off on web servers. NOTE: usage may vary. gpm — mouse mdmonitor — monitor raid devices netfs — nfs, samba etc… autofs — automount, nfs, cd etc… kudzu — detect new hardware restorecond — monitor selinux file context mcstrans — mandatory access […]

Linux: Install Urchin 6 Web Analytics Software

Web analytics is the study of online behaviour in order to improve it. There are two categories; off-site and on-site web analytics. Google’s Urchin 6 can be installed under Linux kernel 2.6 or 2.4 for Apache web log analysis. Urchin 6 is just like Google Analytics the most widely used […]

Solaris > Forcefully unmount the cdrom/floppy disk

fuser command displays the PIDs of processes using the specified files or file systems. You can use fuser command to specifies a file on a mounted file system or a block device that is mounted. All processes accessing files on that file system are listed using -k option you can […]