How to Boot your Para XEN DomU in Rescue Mode

On the XEN virtualization, there may be few problems related to your DomU and can not be fixed by mounting domU disks on dom0, then you need to boot the domU in rescue mode.

Normally whenever you need to boot the RHEL machine in rescue mode, you do it by using CD-ROM/DVD/PXE/NFS/FTP but  para virtualization doesn’t support CD-ROM/DVD/PXE to boot it  hence  you need NFS/FTP/http bootable image to boot the machine.

How to build RPM from source file

I was really in problem that day when I was given a new source code and need to build the RPM to ease to install on servers after changing the code.

But that was really easy to build and install.

There are few points to remember to make the build and use it.

Hence before starting I would like to share few requirements for this.

1. Install all required RPM packages like rpmbuild…etc

2. Create Directories in /usr/src/redhat/

BUILD/
RPMS/
SOURCES/
SPECS/
SRPMS/

3. Download source code of your required software tar.gz file.

4. Put it in /usr/src/redhat/SOURCES/

5. Copy the *.spec file (one file) from source file  to /usr/src/redhat/SPECS/

Now we are ready to make RPM but need to edit the spec file.

Hence for an example I have taken openssl and defining all steps to build new RPMs.

Migration of Network Printers

 

This is my first blog on a small topic but really helpful to save the time.

Lets say that you have 50 network printers connected on a particular linux server and now need to migrate all of them to the newly build server.

Do you imagine  how time consuming and hectic task is it ? ..but you can do this and consume only a single minute out of hours.

so the steps are here…

Hello world! Need Practical guidance on Unix?

Hello Everyone

Practical and theoretical have major difference when you work in an industry.

Need Practical guidance on Unix? I will share with you shortly.

 Keep  in touch with me to discuss any query