how to revert os patching on centos 8 Archives - Linux Windows and android Tutorials https://www.osradar.com tutorials and news and Seurity Thu, 26 Dec 2019 23:24:44 +0000 en-US hourly 1 https://wordpress.org/?v=5.8.13 How To Revert OS Patching on CentOS 8 / RHEL 8 https://www.osradar.com/how-to-revert-os-patching-on-centos-8-rhel-8/ https://www.osradar.com/how-to-revert-os-patching-on-centos-8-rhel-8/#respond Fri, 27 Dec 2019 11:01:00 +0000 https://www.osradar.com/?p=17075 Sometimes we run updates on our system and they may break your system or application that is running on top of it. Although these occurs rarely but we will see here that how we can revert our updates. Follow the below steps to proceed towards reverting. Step 1: Update History You can see the history […]

The post How To Revert OS Patching on CentOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.

]]> Sometimes we run updates on our system and they may break your system or application that is running on top of it. Although these occurs rarely but we will see here that how we can revert our updates. Follow the below steps to proceed towards reverting.

Step 1: Update History

You can see the history of updating all activities you have made so for with yum command including the OS Patching by running. Run with sudo.

[root@localhost sabi]# yum history
 ID     | Command line             | Date and time    | Action(s)      | Altered
 16 | install -y redis         | 2019-12-24 06:28 | Install        |    1    15 | -y install @mariadb      | 2019-12-24 06:22 | Install        |   10    14 | install -y nodejs nginx  | 2019-12-24 06:21 | Install        |    9  < 13 | install -y epel-release  | 2019-12-24 06:20 | Install        |    7 >  12 | -y update                | 2019-12-24 05:24 | I, U           |   92 EE 11 | install -y VirtualBox-6. | 2019-12-24 05:00 | Install        |   35 EE 10 | -y install wget          | 2019-12-24 04:23 | Upgrade        |    1     9 | install -y kernel-devel  | 2019-12-23 21:05 | Install        |  123     8 | -y update                | 2019-12-23 19:24 | I, U           |   78 EE

As you can see the output above, you can see the ID of updates.

You can also find more information of the history by typing

yum history info <ID>

Output:

[root@localhost sabi]# yum history info 8
 Transaction ID : 8
 Begin time     : Mon 23 Dec 2019 07:24:42 PM PKT
 Begin rpmdb    : 1325:302c06910b5035a294f72fe71b9b0411003a5791
 End time       : Mon 23 Dec 2019 07:30:53 PM PKT (6 minutes)
 End rpmdb      : 1329:2256499a1b7cbafa860a3d6291d1c09aeeca3b53
 User           : Sabir Hussain 
 Return-Code    : Success
 Releasever     : 8
 Command Line   : -y update
 Packages Altered:
     Install  grub2-tools-efi-1:2.02-66.el8_0.1.x86_64               @BaseOS
     Install  kernel-4.18.0-80.11.2.el8_0.x86_64                     @BaseOS
     Install  kernel-core-4.18.0-80.11.2.el8_0.x86_64                @BaseOS
     Install  kernel-modules-4.18.0-80.11.2.el8_0.x86_64             @BaseOS
     Upgrade  bash-4.4.19-8.el8_0.x86_64                             @BaseOS
     Upgraded bash-4.4.19-7.el8.x86_64                               @@System
     Upgrade  bind-export-libs-32:9.11.4-17.P2.el8_0.1.x86_64        @BaseOS
     Upgraded bind-export-libs-32:9.11.4-16.P2.el8.x86_64            @@System
     Upgrade  bpftool-4.18.0-80.11.2.el8_0.x86_64                    @BaseOS
     Upgraded bpftool-4.18.0-80.el8.x86_64                           @@System
     Upgrade  cockpit-185.1-1.el8_0.x86_64                           @BaseOS
     Upgraded cockpit-185-2.el8.x86_64                               @@System
     Upgrade  cockpit-bridge-185.1-1.el8_0.x86_64                    @BaseOS
     Upgraded cockpit-bridge-185-2.el8.x86_64                        @@System
     Upgrade  cockpit-system-185.1-1.el8_0.noarch                    @BaseOS
     Upgraded cockpit-system-185-2.el8.noarch                        @@System
     Upgrade  cockpit-ws-185.1-1.el8_0.x86_64                        @BaseOS
     Upgraded cockpit-ws-185-2.el8.x86_64                            @@System
     Upgrade  device-mapper-multipath-0.7.8-7.el8_0.2.x86_64         @BaseOS
     Upgraded device-mapper-multipath-0.7.8-7.el8.x86_64             @@System
     Upgrade  device-mapper-multipath-libs-0.7.8-7.el8_0.2.x86_64    @BaseOS
     Upgraded device-mapper-multipath-libs-0.7.8-7.el8.x86_64        @@System
     Upgrade  dracut-049-10.git20190115.el8_0.1.x86_64               @BaseOS
     Upgraded dracut-049-10.git20190115.el8.x86_64                   @@System
     Upgrade  dracut-config-rescue-049-10.git20190115.el8_0.1.x86_64 @BaseOS
     Upgraded dracut-config-rescue-049-10.git20190115.el8.x86_64     @@System
     Upgrade  dracut-network-049-10.git20190115.el8_0.1.x86_64       @BaseOS
     Upgraded dracut-network-049-10.git20190115.el8.x86_64           @@System
     Upgrade  dracut-squash-049-10.git20190115.el8_0.1.x86_64        @BaseOS
     Upgraded dracut-squash-049-10.git20190115.el8.x86_64            @@System
     Upgrade  grub2-common-1:2.02-66.el8_0.1.noarch                  @BaseOS
     Upgraded grub2-common-1:2.02-66.el8.noarch                      @@System
     Upgrade  grub2-pc-1:2.02-66.el8_0.1.x86_64                      @BaseOS

Similarly you can see the information about other ID’s.

Step 2: Revert Updates

After identifying the OS patching ID and Kernel updates ID (mostly updated kernel is installed along with OS patching), move forward to revert updates one by one.

Step 3: Kernel

This step will not be applicable if the Kernel was installed along with OS patching (yum update).

Type the following command to revert the history followed by ID. Press Y to Continue.

yum history undo <ID>

Output:

[root@localhost sabi]# yum history undo 8
 Last metadata expiration check: 0:01:19 ago on Wed 25 Dec 2019 12:47:38 PM PKT.
 Undoing transaction 8, from Mon 23 Dec 2019 07:24:42 PM PKT
     Install  grub2-tools-efi-1:2.02-66.el8_0.1.x86_64               @BaseOS
     Install  kernel-4.18.0-80.11.2.el8_0.x86_64                     @BaseOS
     Install  kernel-core-4.18.0-80.11.2.el8_0.x86_64                @BaseOS
     Install  kernel-modules-4.18.0-80.11.2.el8_0.x86_64             @BaseOS
     Upgrade  bash-4.4.19-8.el8_0.x86_64                             @BaseOS
     Upgraded bash-4.4.19-7.el8.x86_64                               @@System
     Upgrade  bind-export-libs-32:9.11.4-17.P2.el8_0.1.x86_64        @BaseOS
     Upgraded bind-export-libs-32:9.11.4-16.P2.el8.x86_64            @@System
     Upgrade  bpftool-4.18.0-80.11.2.el8_0.x86_64                    @BaseOS
     Upgraded bpftool-4.18.0-80.el8.x86_64                           @@System
     Upgrade  cockpit-185.1-1.el8_0.x86_64                           @BaseOS
     Upgraded cockpit-185-2.el8.x86_64                               @@System
     Upgrade  cockpit-bridge-185.1-1.el8_0.x86_64                    @BaseOS
     Upgraded cockpit-bridge-185-2.el8.x86_64                        @@System
     Upgrade  cockpit-system-185.1-1.el8_0.noarch                    @BaseOS
     Upgraded cockpit-system-185-2.el8.noarch                        @@System
     Upgrade  cockpit-ws-185.1-1.el8_0.x86_64                        @BaseOS
     Upgraded cockpit-ws-185-2.el8.x86_64                            @@System
     Upgrade  device-mapper-multipath-0.7.8-7.el8_0.2.x86_64         @BaseOS
     Upgraded device-mapper-multipath-0.7.8-7.el8.x86_64             @@System
     Upgrade  device-mapper-multipath-libs-0.7.8-7.el8_0.2.x86_64    @BaseOS
     Upgraded device-mapper-multipath-libs-0.7.8-7.el8.x86_64        @@System
     Upgrade  dracut-049-10.git20190115.el8_0.1.x86_64               @BaseOS
     Upgraded dracut-049-10.git20190115.el8.x86_64                   @@System
     Upgrade  dracut-config-rescue-049-10.git20190115.el8_0.1.x86_64 @BaseOS
     Upgraded dracut-config-rescue-049-10.git20190115.el8.x86_64     @@System
     Upgrade  dracut-network-049-10.git20190115.el8_0.1.x86_64       @BaseOS
     Upgraded dracut-network-049-10.git20190115.el8.x86_64           @@System
     Upgrade  dracut-squash-049-10.git20190115.el8_0.1.x86_64        @BaseOS
     Upgraded dracut-squash-049-10.git20190115.el8.x86_64            @@System
     Upgrade  grub2-common-1:2.02-66.el8_0.1.noarch                  @BaseOS
     Upgraded grub2-common-1:2.02-66.el8.noarch                      @@System
     Upgrade  grub2-pc-1:2.02-66.el8_0.1.x86_64                      @BaseOS
     Upgraded grub2-pc-1:2.02-66.el8.x86_64                          @@System
     Upgrade  grub2-pc-modules-1:2.02-66.el8_0.1.noarch              @BaseOS

Step 4: Revert Packages

Run the yum history undo with ID to revert the activities (revert OS updates)

[root@localhost sabi]# yum history undo 6
 Last metadata expiration check: 0:04:21 ago on Wed 25 Dec 2019 12:47:38 PM PKT.
 Undoing transaction 6, from Sun 22 Dec 2019 02:17:13 PM PKT
     Install ipvsadm-1.29-8.el8.x86_64 @AppStream
 Dependencies resolved.
  Package          Arch            Version             Repository           Size
 Removing:
  ipvsadm          x86_64          1.29-8.el8          @AppStream           83 k
 Transaction Summary
 Remove  1 Package
 Freed space: 83 k
 Is this ok [y/N]: y
 Running transaction check
 Transaction check succeeded.
 Running transaction test
 Transaction test succeeded.
 Running transaction
   Preparing        :                                                        1/1 
   Running scriptlet: ipvsadm-1.29-8.el8.x86_64                              1/1 
   Erasing          : ipvsadm-1.29-8.el8.x86_64                              1/1 
   Running scriptlet: ipvsadm-1.29-8.el8.x86_64                              1/1 
   Verifying        : ipvsadm-1.29-8.el8.x86_64                              1/1 
 Removed:
   ipvsadm-1.29-8.el8.x86_64                                                     
 Complete!

After it, reboot system by 

reboot

Step 5: Verifying Revert Process

Kernel

Type the given command to verify the revert process of kernel

uname -a

Output:

[root@localhost sabi]# uname -a
 Linux localhost.localdomain 4.18.0-80.11.2.el8_0.x86_64 #1 SMP Tue Sep 24 11:32:19 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Packages

Run the below command to verify the revert process of Packages by comparing new and downgraded version.

rpm -qa <package name>

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The post How To Revert OS Patching on CentOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.

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