VMWare ESXi 3.x is a free version and lightweight version of the VMWares ESX platform. It supports most of the key features that ESX has but comes in appliance like package which doesn’t let you configure anything more than just…
Have you ever wondered how to query the architecture (32bit or 64bit) or rpm version that is installed on your Linux system? Has a DBA ever come to you and asked the following: “Why is my Oracle Linux server missing…
iSCSI or internet SCSI is a standard for running SCSI over an ip based network. For people familiar with this technology it basically enables you to mount remote disks over your existing IP infrastructure. Today I setup a simple iSCSI…
Today I setup vsftp for local user ftp access. I turned on ‘chroot_local_user=YES’ which essentially puts the ftp user into a vsftp chroot jail. But what happens when you want to access something outside of user’s home directory? What? Symlinks…
After analyzing the situation I have identified several key problems. 1. System Availability – Systems fail frequently due to hardware failures, DoS, and application failures. 2. Collocation is far and administration requires frequent visits 3. Mini tower servers consume space…
This link from the Redhat knowledge base talks all about it. Here’s the list of steps and pointers I had to go through. 1. Make sure that the 8021q module is loaded modprobe 8021q 2. This step is important as…
This page proves there are people out there who forget about the same things I forget. Here’s the POST I wanted to run today. curl -d “platform=CHANNEL&processor_target=CERT&charge_type=PING” http://app01.qa.paygateway.com:31080/Quicksilver/
Objective: I need search and replace a specific text string on multiple files at once. Solution: Using SED in a bash FOR loop to search for the text you want to replace. for a in `find . -name ‘*filename*’`; do…
Top is amongst the most comprehensive and informative process display command in Linux. There’s no reason for a seasoned Linux sysadmin like myself not to know it! Top can display all the information you need to know about processes and…
In my Linux life, I find myself trying to search for files quite frequently. All distributions comes with a very handy command called ‘locate’ which helps you search for the file. What it does is Linux keeps an index and…