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How To Upgrade FreeBSD Jail ( OS Level Virtualization )

Q. I’ve FreeBSD jail configured as explained in man pages using make world options. Now I’ve upgrade my base FreeBSD 7.0 system to FreeBSD 7 patch level 4. How do I upgrade my Jail (FreeBSD VPS) so that everything get updated inside jail?
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Red Hat / CentOS Linux: Explain Use of Network Interface virbr0

Q. I’ve installed Red Hat Enterprise Linux 5.2 and I see virbr0 network interface along with my eth0 interface? What it is? How do I disable or remove virbr0?
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Find Out Vmware Server Version Under Linux Server

Q. Under Windows it is pretty easy to find out VMware server version. How do I find out remote vmware server version using ssh client running under RHEL / CentOS Linux 5.x?
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Install VMware Tools In Ubuntu Linux ( VMwareTools-1.0.5-8017.tar.gz file )

Q. How do I install VMware tools (virtual server tools) in Ubuntu Linux to improve the performance of the guest VPS (VM machine) system?
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Explain: Tier 1 / Tier 2 / Tier 3 / Tier 4 Data Center

Q. What is data center tiers? What is tier 1 data center? Which tier / level is the best for maximum uptime?
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Can RAID Act As The Reliable BACKUP Solution For Linux / UNIX / Windows Server?

Q. Can I use RAID as the only backup solution under Linux? Is RAID is reliable backup solution for server?
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Suse Linux install vmware tools

Q. I’m using OpenSuse as Guest OS (VPS). Installing SUSE Linux as a VMware Workstation guest operating system was easy task. But how do I setup and install SUSE Linux as a VMware Guest? How do I install vmware tools to improve performance?

A. In order to install Vmware tools, you need to build kernel modules. Building kernel modules is easy provided that following packages are installed on the guest OpenSuse / Suse Linux (VPS):

=> kernel-source

=> binutils

=> make

=> gcc

=> gcc-c++

Install required software

Login to guest oses using SSH or Vmware server console. Use yast command (yast control center) to install required software:
# yast
Select Software > Software management > Add above packages > Accept and install the softwares
The Software Management tool in YaST text mode
(YaST text mode software installation)

If you are using a GUI, you should see screen as follows (YaST2 screen):

Start VMWARE Tools installation

You need to start VMware tools installation from Vmware server console or Vmware Workstation VM menu.
Click on VM Menu > Select Install Vmware Tools… > Click on Install
Start VMWARE Tools installation

Mount the VMware Tools virtual CD

If you are using guest system’s desktop, you should have mounted a CD. If you are using text mode, run mount command as follows:
# mount /dev/hdc /media

mount: block device /dev/hdc is write-protected, mounting read-only

Replace /dev/hdc with actual virtual cd rom drive.

Install the VMware Tools RPM

Finally install rpm file,
cd /media
rpm -ivh VMwareTools-1.0.3-44356.i386.rpm

Configure Vmware tools

Next you need to run the VMware Tools configuration script. You must run script from VMWare server console / Workstation and not from SSH session:
# vmware-config-tools.pl
# vmware-config-tools.pl -default

Can I use tape drive with XEN VPS / Guest oses?

Q. I’ve CentOS 5.0 server running XEN kernel. VPS Guest is Linux distribution. How do I use tape drive with XEP Guest os?

A. You can’t use character devices such as tape drives in Xen guests. This is limitation of Xen. It doesn’t have the ability to export character devices to multiple guests oses.

However for backup you can use rsync or ftp server or NAS server.

What are the different RAID levels for Linux / UNIX and Windows Server?

Q. What are the different RAID levels? Which one is recommended for file server and database server?
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OpenVZ Virtual Machine (VPS) Management

Now, my VPS is up and running. How do I manage my hardware node and VPS? How do I see a list of all running VPSes? How do I see memory usage and other stuff?
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