Posts Tagged ‘ Red Hat ’

Likewise similar to Winbind is an open source software used to integrate linux server with Microsoft Active Directory authentication. This article assume that you already have Likewise installed and configured on the Linux server. The steps below is simply to grant a new AD group the privilege to logon to a Linux server. To...
Read more »

This does not happen often, but you may run into a situation where you need to reduce the size of the Linux filesystem. Well, in my case I wanted to clone my Red Hat Enterprise Linux server which was running in Vmware ESXi. The root filesystem was originally built too large and I wanted...
Read more »

Being the administrator of a large Linux shop, I have had to extend the filesystems on the Red Hat Linux server a few times. Each time I had the opportunity to extend the filesystem, I found that I struggled to remember the commands and steps. This is because Linx is a very command line...
Read more »

A funny thing happened to one of my Red Hat 5 Enterprise servers after applying the errata. I rebooted the servers as usual after applying the updates, and they came up just fine. But unfortunately I was not able to logon remotely via ssh to a server. I tried various different accounts including root,...
Read more »

The administrative account ‘root’ is the most powerful user in Linux and Unix. This account is created by default during installation of the operating system. Most security consultants will recommend that the root account be deleted or renamed. This is to make it harder for a hacker to find out what a valid user...
Read more »

I have created a step by step approach to troubleshoot a problem with performing yum update and how to rebuild the rpm database. I received and error while trying to update the Redhat Enterprise 5 server kernel using yum update. Looking at the output of yum update it seems that the dependency mkinitrd was...
Read more »

Red Hat Linux can be booted into rescue mode from the installation CD, or any other boot method instead of the system’s hard drive. This also applies to other versions of Linux such as Fedora and Centos. The rescue mode is provided for troubleshooting and repair purposes. This is really handy when the OS...
Read more »

Use the command uname to print system information in Linux. # uname -r 2.6.18-194.32.1.el5 The –r option will print the kernel release. # uname -s Linux -s prints the kernel name. # uname -n mycomputer.wiivil.com Print the node name or hostname. # uname -p i686 Print the processor type, the i686 signifies a 32...
Read more »