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This tutorial shows the RHEL 7.1 basic minimal installation with GUI (Gnome Desktop) on an Intel x86-64 processor architecture using a binary DVD ISO image.
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Distribution. page. By 2. 00. 1 the list had grown to fill both sidebars of the weekly. So the list. was moved to a flat file and released on October 1. The next major release was on February 7, 2. Additional information. Minor. revisions have been made almost every week since then.
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A table of. contents was added on May 9, 2. There have been no major releases. Someday this list will hopefully move to a searchable database, making it. In the meantime, we. Linux diversity, with over 5.
Upgrade from Cent. OS 6. 5 to Cent. OS 7 using redhat- upgrade- tool. Last month Red Hat released RHEL 7 and few days ago Cent. OS announced the GA of Cent. OS 7. As you may know, starting RHEL 7 Red Hat introduces support for upgrading to major releases (RHEL 6. RHEL 7) via a tool called redhat- upgrade- tool. Not sure if this is 1.
Cent. OS at this time, but I found the Cent. OS rpm packages on their development site and thought of giving them a try and luckily it turned out OK.
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The Release Notes provide high-level coverage of the improvements and additions that have been implemented in Red Hat Enterprise Linux 6.9 and document known problems.
Of course this is only a proof of concept, it may possibly not work by default on production environments, so use with care. For my test I used a fully updated base installation of Cent.
OS 6. 5 VM running on Virtual. Box. Download required packagesmkdir - p /root/upgrade. Packages/preupgrade- assistant- 1. Packages/preupgrade- assistant- contents- 0. Packages/preupgrade- assistant- ui- 1. Packages/redhat- upgrade- tool- 0. Install preupgrade assistantyum localinstall preupgrade- assistant- *Run preupgrade assistantpreupg This does a check on the installed system and tries to identify potential issues after the upgrade.
It should be run until all tests pass successfully. Not sure it did anything on my VM as all tests returned “not applicable”. I haven’t used the original tool (for RHEL7) but I suspect the Cent. OS equivalent is still work in progress, so I decided to skip it. More info on the preupgrade assistant is available in the Red. Hat official documentation. Install redhat- upgrade- toolyum localinstall redhat- upgrade- tool- 0.
Import the Cent. OS 7 rpm gpg keyrpm - -import http: //ftp. RPM- GPG- KEY- Cent. OS- 7. Run the upgrade tool. The tool can use a local ISO, the local media drive or a network URL to perform the upgrade. The network command argument needs to be followed by a release version (rawhide is also supported) and a valid installation repository (at the time of this writing not all repositories were updated or reachable, so I did some trial and error until I found a working repo) which can be defined as a standard URL or a mirror (full mirror list is available here).
Should this warn you that you didn’t run the upgrade assistant, you can force its execution by adding the extra option: redhat- upgrade- tool - -network 7. A successful run ends with this message: “Finished. Reboot to start upgrade.“Reboot.
After restarting the machine, the OS will boot a new grub entry called System Upgrade which is supposed to upgrade all packages previously downloaded by the upgrade tool. I ran into a small problem here “Database environment version mismatch” likely caused by the rpm tool itself (rpm version is 4. Cent. OS 7 and 4. Cent. OS 6). cd /mnt/var/lib/rpm.
Removing the rpm database files and rebooting worked for me (CTRL+D or exiting the shell should also work as that would exit the emergency mode and continue from the last step before the error occurred) and the upgrade went through without other issues. Cent. OS Linux release 7. Core)UPDATEIf you follow this guide make sure you use the latest releases of the upgrade packages (preupgrade- assistant- * and redhat- upgrade- tool) as provided by Cent. OS here. Also note that after the writing of this article, Cent.
OS published a wiki page on the upgrade tool so it’s probably best to use that instead.