You need to know, what is version of your HBA firmware to upgrade it or install compatible driver version. There is many ways to find firmware version but I want to share easier way. Just logon to your Linux machine with Sudo user and run the below command: cat /sys/class/fc_host/host*/symbolic_name
Device Naming Device name management is handled by udev system. When Linux kernel discovers a new device (e.g., a network interface card) added to the system, it notifies udev daemon of the device event. The udev daemon will then match various device attributes against a set of rules to identify the device, name it, and store its information in udev database. In case of network devices, udev relies on MAC addresses to assign persistent names to the devices. The MAC address based naming rules are stored in “/etc/udev/rules.d/70-persistent-net.rules”.
What’s UUID? A universally unique identifier (UUID) is a 128-bit number used to identify information in computer systems. Microsoft uses the term globally unique identifier (GUID), either as a synonym for UUID or to refer to a particular UUID variant. When generated according to the standard methods, UUIDs are for practical purposes unique, without requiring a central registration authority or coordination between the parties generating them. The probability that a UUID will be duplicated is not zero, but is so close to zero as to be negligible. Thus, anyone can create a UUID and use it to identify something with near certainty that the identifier does not duplicate one that has already been created to identify something else, and will not be duplicated in the future. Information labeled with UUIDs by independent parties can therefore be later combined into a single database, or transmitted on the same channel, without needing to resolve conflicts between identifiers.
Let me guess, you want to know something about Oracle Linux, you will google it! Want to know something about Oracle VM, so you will google it but do you know that you can find all information about Oracle products in a library? Yes, you can find many useful information or download them as different type of documents from Oracle Help Center. There is some categories for all documents and you can find your documents faster: Cloud Application Middleware Database Big Data Enterprise Manager Engineered Systems Java Servers Networking Virtualization Storage Operating Systems Industries
What’s Red Hat Access Labs? Red Hat Access Labs is a package of online application that you can use them to generate configuration files, bash script to detect vulnerabilities, analyzing issues and … . The online applications are created by RedHat engineers to help you improve performance, troubleshoot issues, identify security problems, and optimize configuration. You can access to the application via the below link: https://access.redhat.com/labs Also you need to valid username on RedHat web site to access to the lab.
VI If you are familiar with Linux shell, I’m sure that you have used “vi” for editing your documents but the tool is very difficult, if you are beginner in Linux. I want to share some keyboard shortcuts that you can use for edit your files faster. Quitting : x Exit, saving changes :q Exit as long as there have been no changes ZZ Exit and save changes if any have been made :q! Exit and ignore any changes Inserting Text i Insert before cursor I Insert before line a Append after cursor A Append after line o Open a new line after current line O Open a new line before current line r Replace one character R Replace many characters
Yum Server Sometimes, you need to update single package on your Linux (Oracle – RedHat) and you have to search and find RPM file on this regard or compile the package from its source code. But we are talking enterprise Linux servers that you can’t accept any risk of installing miscellaneous or unreliable package on your server. So you need to have safe and secure source for installation or upgrade. Maybe, you are thinking about YUM! Yes, you can update your application by run Yum but if your server has no connection to internet! There is many solution for updating Linux packages but we are talking about a single application and some special conditions. Hopefully, Oracle has a service that called “Yum Server” and the service is free for use by anyone. Oracle Yum Server offers you a free and convenient way to install the latest Oracle Linux packages as well as packages from the Oracle VM installation media via a yum client. Please consider that this service deliver no support to you and just you can download updated packages from that.
Kickstart installations offer a means to automate the installation process, either partially or fully. Kickstart files contain answers to all questions normally asked by the installation program, such as what time zone you want the system to use, how the drives should be partitioned, or which packages should be installed. Providing a prepared Kickstart file when the installation begins therefore allows you to perform the installation automatically, without need for any intervention from the user. This is especially useful when deploying Red Hat Enterprise Linux on a large number of systems at once. Kickstart files can be kept on a single server system and read by individual computers during the installation. This installation method can support the use of a single Kickstart file to install Linux on multiple machines, making it ideal for network and system administrators. All scripts and the log files of their execution are stored in the /tmp directory to assist with debugging installation failures. Note You must read your distribution documents about fresh installation and upgrading current OS because some distributions don’t support upgrading via KickStart. How Do You Perform a Kickstart Installation? Kickstart installations can be performed using a local DVD, a local hard drive, or via NFS, FTP,...
Veeam Backup & Replication is one of the best backup and replication software that you can use them in your virtual environment. Veeam BR be able to IP customization during disaster-recovery and you can have your virtual machines in a DR site with different IP plan. But Veeam BR just support Windows VMs for IP customization or “Re-IP Rule”. So what can we do about Linux virtual machines and others?
I have this issue on my physical machine when NAC Agent is installed on them and sometimes, we faced with “There are currently no logon servers available to service the logon request“. The issue was happened randomly and we have to restart the machine for resolving issue. Microsoft has published a KB and you can read the solutions for the problem: Netlogon Event ID 5719 or Group Policy Event 1129 is logged when you start a Domain Member Also a hotfix has been released for Windows 7 about DHCP relay agent delay, I suggest that installed the hotfix on your clients: Event ID 5719 and event ID 1129 may be logged when a non-Microsoft DHCP Relay Agent is used
