Читать книгу Mastering Linux System Administration - Richard Blum - Страница 92

 Review needed CentOS hardware resources. Determining the hardware resources required for a CentOS installation on a physical or virtualized server helps to ensure a successful completion of the install. It also avoids important project delays due to under‐resourced systems.Master It Imagine that you need to install the CentOS distribution on a physical server that has a dual‐core 2 GHz CPU, 200 GB hard drive, and 2 GB of RAM. Are the server's resources at the recommended level? Why or why not?

 Determine the requirements for a virtual CentOS system. Installing the CentOS distribution as a VM on a host system has different requirements than a direct installation on a physical server. It is critical to evaluate the host system so that the installation is successful.Master It Your project team is planning on installing two CentOS VMs on a host system that has a quad‐core 2.8 GHz CPU, 200 GB of free disk space, and 32 GB of RAM. Are the host system resources sufficient? Why or why not?

 Obtain CentOS software. To install the CentOS Linux distribution, you must have the proper ISO image file. This is true whether you are installing it directly on hardware or as a VM. Besides getting the ISO file, you need to ensure that it is not corrupted so that the installation proceeds well.Master It You've downloaded the CentOS ISO image file, but you are concerned that during the download process, file corruption occurred. What should you do to see whether the ISO image file is corrupt?

 Conduct an installation of a CentOS distribution. There are several steps to successfully install a CentOS distribution, and it is critical to make sure you complete all of them. Skipping a step can cause problems immediately as well as problems later, if you can even get the system to boot.Master It Your sysadmin team has correctly installed the CentOS software from the ISO image file, and the system booted without any problems. What's the next step?

 Audit the CentOS distribution's installation. If you had some problems while booting the system, there are a few commands you can use to look at helpful boot messages. But even a successful installation still requires a few additional checks.Master It At your company, you have completed the entire CentOS distro installation process on a new system without any problems, but you then ran into issues the last time the server was rebooted. You need to review the boot messages to track down the problem(s). What log file can you use to view these messages?