Downgrade to previous version: yum

Sometime yum update just breaks everything. We experienced this, and had to go backup to previous versions.

In RHEL6 and RHEL7 you can run this command:

which will give you a list of transactions ID’s. Now you just need to figure out how far you want to go back in the history, and do the roll back with:

where N is the number of transaction ID.

[root@P1servername01 tmp]# yum history list all
Loaded plugins: product-id, search-disabled-repos, subscription-manager
ID     | Login user               | Date and time    | Action(s)      | Altered
-------------------------------------------------------------------------------
64 | Jon Doe    	| 2017-10-31 16:25 | Install        |    1 EE
63 | Jon Doe      	| 2017-10-31 16:25 | Erase          |    1 EE
62 | root               | 2017-10-31 04:25 | Update         |   10
61 | Ingvar Nielsen    	| 2017-10-21 15:09 | E, I, O, U     |   69 E<
60 | root              	| 2017-10-17 04:25 | Update         |    3 >
59 | root              	| 2017-10-10 04:25 | Update         |    4
58 | Jon Doe    	| 2017-10-04 11:39 | Install        |    1
57 | root              	| 2017-09-26 04:25 | Update         |    6
56 | Tram Trong 	| 2017-09-15 09:37 | E, I, U        |    6
55 | root 		| 2017-09-12 04:25 | E, I, U        |   53 EE
54 | Jon Doe 		| 2017-08-23 12:00 | I, U           |    3 EE
53 | Jon Doe 		| 2017-08-23 11:05 | Install        |    2
52 | root               | 2017-08-22 04:25 | Update         |    2
51 | Ingvar Nielsen 	| 2017-08-19 11:05 | E, I, U        |    9
50 | Jon Doe    	| 2017-08-14 11:57 | Install        |    1

Missing

I had a Ubuntu version 16 running in a virtualbox, and wanted copy text from host to the virtual machine. But it didn’t work. It turns out you need to install the Guest Additions CD image. There is an option from the Devices -> Insert guest additions CD image, but I got then this error message:

Unable to insert the virtual optical disk E:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso into the machine cytomin.

Could not mount the media/drive ‘E:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso’ (VERR_PDM_MEDIA_LOCKED).

Result Code: E_FAIL (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
Callee: IMachine {b2547866-a0a1-4391-8b86-6952d82efaa0}

 

The solution was simple enough, just had to run this command:

sudo apt-get install virtualbox-guest-utils