Update the Kernel Package Appropriately to Ensure a Bootable System...
5/19/2017
RHEL7: Update the kernel package appropriately to ensure a bootable system. - CertDepot
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RHEL7: Update the kernel package appropriately to ensure a bootable system.
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Last updated on March 3, 2017 (11,842 views) - CertDepot — 65 Comments ↓
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RHCSA7: Task of the day Allowed time: 3 minutes. Check that you've got no SELinux policy violations.
Note: This is an RHCSA 7 exam objective. To install a new kernel package, type: # yum install kernel.rpm
RHCE7: Task of the day Allowed time: 10 minutes. Configure a httpd server
or
# rpm -ivh kernel.rpm Note: Don’t use the -U option which replaces the current kernel
that executes a Perl script in the /var/www/cgi-bin directory displaying "Hello!".
instead of adding it to the boot menu. (1 votes, average: 5.00 out of 5)
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RHEL7: Update the kernel package appropriately to ensure a bootable system. - CertDepot
65 Comments on "RHEL7: Update the kernel package appropriately to ensure a bootable system."
What is your favorite RHEL 7 book to prepare RHCSA & RHCE exams?
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Sander van Vugt's book (51%, 1,321 You must be logged in to post a comment.
Votes)
Asghar Ghori’s book Sort by: newest | oldest
(22%, 573 Votes)
None (9%, 240 Votes)
vivek
Others (9%, 236 Votes) Member
“rpm -ivh kernel.rpm”
Andrew Mallett's
Do we just have to run this command? Is this
Jang/Orsaria's book
package available automatically or do we have to
(4%, 102 Votes)
book (4%, 106 Votes)
configure any repo? do we have to change anything in grub.config file?
Total Voters: 2,578
Your site is helping a lot to learn, thanks for that. 1 year 5 months ago
CertDepot
Author
Yes, you will need to configure a repository
Poll for most difficult RHCSA 7 topic
to be able to get packages. The other option is to download each package separately but this way nothing will deal with dependencies and it will be a big
What do you think is the most difficult RHCSA 7 topic?
work for almost nothing. 1 year 4 months ago
bajeradai
Member
Could you please write complete steps for updating new kernel?
Systemd LVM Kickstart SELinux LDAP ACL Automounter Others
I think before # rpm -ivh kernel.rpm, there should https://www.certdepot.net/rhel7-update-the-kernel-package/
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RHEL7: Update the kernel package appropriately to ensure a bootable system. - CertDepot
be # wget kernel.rpm.
Vote
Also grub2-set-default 0 to set new kernel and if new kernel is in second line of grub2 menu, grub2set-default 1 should be used in last step.
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Thanks. 1 year 4 months ago
CertDepot
Author
Poll for most difficult RHCE 7 topic
You are right about getting the new kernel What do you think is the most difficult RHCE
package: you need to use wget or a command like that to download the
7 topic?
package. After, by default, the new kernel is put at the first line of the grub menu. You don’t need to run any command for that.
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1 year 4 months ago
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arclight
NFS Samba Postfix
Member
This is great information, thanks again. I have a big
MariaDB
issue in setting up the local repositories as pre-
Others
dependency for this Question (and pretty much for all other questions requiring yum installation). As I
Vote
understand it, a new installation of the server during the exam would contain no .repo files in the
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/etc/yum.repos.d directory, and it assumed that we need to set this up first and foremost, is this correct? 1 year 4 months ago
CertDepot
Author
Yes, I think. This is correct. 1 year 4 months ago
Recently Updated Pages RHEL7: Apply a tuning profile to a server. RHEL7 Latest tutorials
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arclight
routine SELinux policy violations. RHEL7: How to get
Thanks for that. Could you please point me to the Member
appropriate certdepot page for repos setup, particularly from the RHCSA exam perspective?
started with NetworkManager.
1 year 4 months ago
CertDepot
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Repository can be studied in this page. 1 year 4 months ago
arclight
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SELINUX: Diagnose and address
RHEL7: How to install Cockpit. RHEL7: How to get started with network throughput measurement. RHEL7: Configure a Kerberos KDC. RHEL7: Use Kerberos to control access to NFS network shares. RHEL7 Quick recipes
Much appreciated, thanks 1 year 4 months ago
RHEL7: How to set up the NTP service.
bajeradai
Member
Can we just run this command to upgrade new
Recent Comments
kernel from ftp or given path? # yum update kernel
Sam on RHEL7: 1 year 4 months ago
CertDepot
Author
When you run the yum update kernel command, you ask the various configured repositories in the /etc/yum.repos.d directory for updates. If no repository is configured, nothing happens. Most repositories are remote http servers or local directories. You could certainly set
https://www.certdepot.net/rhel7-update-the-kernel-package/
Provide SMB network shares to specific clients. CertDepot on RHEL7: Extend existing unencrypted logical volumes. samuel.sappa on RHEL7: Provide SMB network shares to specific clients.
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up a repository based on ftp but it’s not a
Sultan on RHEL7:
classic configuration.
Extend existing unencrypted logical volumes.
1 year 4 months ago
bajeradai
samuel.sappa on RHEL7: Provide SMB network shares to specific clients.
Member
That means, to update the new kernel,just we need to run the command : rpm -ivh kernel.rpm right? 1 year 4 months ago
CertDepot
Author
keep the history of all the installed packages (yum history).
December 2016 November 2016 October 2016
If you absolutely want to use the rpm command, at least use rpm -ivh kernel.rpm. This command doesn’t
September 2016 August 2016
replace/upgrade the current kernel but install a new one: the difference is that the old kernel is kept (very useful in case of boot problems). behaves like rpm -ivh, installing a new kernel instead of replacing/upgrading it. 1 year 4 months ago
In the beginning of this page you said, “Don’t use the -U option” and now, you said to use rpm -Uvh kernel.rpm, Which one is right? In the test, they will give you a link and you will update new kernel from that link. For example, the link is
https://www.certdepot.net/rhel7-update-the-kernel-package/
July 2016 June 2016 May 2016 April 2016 March 2016 February 2016
The yum install kernel.rpm command
Member
May 2017 April 2017 March 2017 February 2017 January 2017
Don’t use the rpm command, it doesn’t
bajeradai
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January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 5/20
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RHEL7: Update the kernel package appropriately to ensure a bootable system. - CertDepot
http://certdepot.net. Can you please
October 2014
write the possible end to end steps?
September 2014 August 2014 July 2014
1 year 3 months ago
CertDepot
Author
You are perfectly right. In my
June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013
previous comment, I made a mistake that I fixed. Use rpm -ivh kernel.rpm or
October 2013 September 2013
yum install kernel.rpm but don’t use rpm -Uvh kernel.rpm. 1 year 3 months ago
bajeradai
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I passed the exam with
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score 277/300 but I
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could not solve the kernel related question, rpm -ivh kernel.rpm command was not working. 1 year 3 months ago
CertDepot
Author
Use yum install instead. 1 year 3 months ago
bajeradai
Member
Thank you.
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1 year 4 months ago
CertDepot
You are welcome.
Author
1 year 4 months ago
mehboob
Member
Hi, Are there any questions in RHEL7 RHCSA exam about kernel tuning optimizing or troubleshooting. Thanks. 1 year 2 months ago
CertDepot
Author
No, There isn’t. 1 year 2 months ago
redhat0329
Member
Hi CertDepot, There is no package name kernel.rpm when I tried #yum search kernel. I only got kernel. is it the same? Thanks in advance. 1 year 1 month ago
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CertDepot
Yes, it is the same, version and Author
rpm extension are not displayed. 1 year 1 month ago
redhat0329
Member
Thanks. 1 year 1 month ago
redhat0329
Member
Thanks 1 year 1 month ago
redhat0329
Member
Hi CertDepot, Do i need to run the below command after updating or installing the kernel? grub2-mkconfig -o /boot/grub2/grub.cfg Thanks 1 year 1 month ago
CertDepot
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Author
Normally you shouldn’t need to. 1 year 1 month ago
redhat0329
Member
Thanks. 1 year 1 month ago
redhat0329
Member
Hi CertDepot, if there are multiple repositories enabled, is it advisable to disable first the other repositories aside from the update repository? enabled=0 to other repos while the update repos enabled=1 before running yum update kernel or yum install kernel? 1 year 23 days ago
CertDepot
Author
Normally, you should have only one repository bringing kernel updates. This problem shouldn’t usually happen. But in case it occurs, your solution is interesting.
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1 year 22 days ago
redhat0329
Member
I’m afraid that conflicts will occur if there are multiple repos are enabled while updating the kernel. Worst thing that it will not boot normally that I might get in trouble with. We’ll I think for precautions disabling the other repos first is a best idea then after updating the kernel that’s the time I enabled again the other repos.
1 year 22 days ago
Annamdi
Member
The truth about it is am still confused about this question when it tends to look simple. I have my Rhcsa exam on friday and still need clarification. when creating the repo for the kernel update. what do you add in the baseurl? 1 year 22 days ago
Sam
Member
Sounds like exam jitters to me. There are a few ways to install a program (ie a kernel). 1)From Source usually (untar, compile and configure) 2)From a Binary (untar, and install)
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3)From a RPM source (downloadable) 4)From a YUM repository see https://www.certdepot.net/rhel7-setlocal-repository-lab/ Note: It is also possible to install a local kernel with yum as well as the above. As it is a Red Hat exam it is unlikely you will get 1) or 2) above. yum localinstall kernel.rpm Hope this helps and good luck with the exam. 1 year 20 days ago
navideh
Member
I do have my own repository ,I want to update my kernel. But when I want to update that ,gives me this error: No packages marked for update. some issues in my repo??? my current kernel is 3.10.0-327.18.2.el7 would you please help me? 11 months 9 days ago
CertDepot
Author
At first sight, I would say you have the standard CentOS repository active and your own repository contains older packages. As a second guess, you didn’t install and run the createrepo package (so your repository metadata are not up to date). As a third guess, I would check the content of the configuration file of your repository. Hope it helps.
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11 months 9 days ago
phil_guy412
Member
Is this another possible option to update the kernel while still keeping the old one? 1. yumdownloader kernel 2. yum install linux-firmware 3. rpm -ivh NEW_KERNEL.rpm or 1. yum update kernel (Not sure if this keeps the old kernel) And when you install a new kernel, does the new kernel automatically become the default boot kernel or do I need to run the grub2-set-default command? 11 months 7 days ago
CertDepot
Author
When you install a new kernel, it automatically becomes the default kernel. You don’t need to run any command. The previous default kernel is kept in the /boot partition so you can enable it again in case of problem. 11 months 6 days ago
navideh
Member
Actually I created my repo on my server and my client reach that repo through HTTP (does my client need to execute the createrepo cmd???) But I think I do have not updated packages on my
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repo before that I share my client (Do I should get updated my package repo on repo and then share with client)? 11 months 5 days ago
CertDepot
Author
Normally when you copy an Iso image of RHEL 7.x/CentOS 7.x, you also copy the metadata of the repository located inside and you don’t need to execute the createrepo command. However, when you create a repository from scratch and put rpm files into it, you definively need to install the createrepo package and execute the createrepo command, otherwise you haven’t got any metadata and your repository will not work. After, when you update your repository packages, it is advised to also execute the createrepo command after to update the corresponding metadata. 11 months 3 days ago
navideh
Member
For the exam our local repo should have four parts that includes base, update, extras and centos plus? or having the base repo is enough to do everything that needs to do on the exam? 10 months 25 days ago
CertDepot
Author
The base repository should be enough. You could optionally include the update
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repository. The two others shouldn’t be necessary at all. 10 months 25 days ago
Lisenet
Member
During the exam you may get a single repo to use, and you are free to name it as you like. It does not matter how you call it, base, update, extras or whatever, the main thing is that the repo will contain all packages you may be asked to install. Do not overthink it, exam questions are crystal clear. 10 months 24 days ago
navideh
Member
How can we update our old version of repository? I ran “yum update” on my system and then create new repo, but still I couldn’t see the new version!!!! Would you help me to fix my problem? 10 months 22 days ago
CertDepot
Author
When you run yum update on your system, you update your system but not your local repository. To update your local repository, and not your local system, read this tutorial: https://www.certdepot.net/rhel7-set-localrepository-lab/ 10 months 22 days ago
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navideh
Member
Do we have to create the same repo in exam? because it will be difficult and take much time to do that! 10 months 20 days ago
CertDepot
Author
You shouldn’t need to create a repository from scratch. 10 months 19 days ago
samuel.sappa
Member
Hi Certdepot, Since we’re troubleshooting the kernel in IMHO we doing this in level 1 or using boot able CD/DVD How can we install kernel by running the rpm -ivh kernel.rpm while we in Level 1 or using CD/DVD bootable? Thank you for your help 9 months 17 days ago
CertDepot
Author
Normally if you’ve got a problem with the currently installed kernel, you can decide to execute a previous version of it through the boot menu. I’m not aware of another option, sorry. 9 months 18 days ago
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samuel.sappa
Hi CertDepot, Thank you for your reply and Member
explanation, by the way your work in this website is awesome I recommended this web to my friend Thanks for sharing 9 months 17 days ago
CertDepot
Author
Thanks. You’re welcome. 9 months 17 days ago
twostep
Member
To verify which kernel is current, you can use a grubby command: grubby –default-kernel grubby –default-index ls -ltr /boot/vmlinuz* grubby –info=/boot/vmlinuz 8 months 24 days ago
CertDepot
Author
I didn’t know that. Very interesting. Thanks. 8 months 24 days ago
[email protected]
Member
There was a Q in RHCSA exam ( forgot the full description). install the kernel from a repo (http), make sure this is the default kernel at boot up.
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Would yum install kernel *** will do the work or you need to put grub2 set-default as well. Thanks 8 months 2 hours ago
CertDepot
Author
Normally, yum install kernel*** should be enough. 7 months 29 days ago
eleanya
Sorry for the stupid question. I
Member
thought the command was “yum install kernel” 2 months 16 days ago
CertDepot
Author
You are perfectly right. I added yum install kernel to this page because it’s a valid answer. 2 months 15 days ago
samuel.sappa
Member
Hi CertDepot, When we install new kernel is it by default the one will using during boot or we must configure it manually
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6 months 18 days ago
CertDepot
Author
The new installed kernel will be automatically used at the next boot. 6 months 18 days ago
zi
Member
if we were asked to update kernel from a specific path how should we get the update? and where should we store it? 1 month 17 days ago
CertDepot
Author
The path of new kernel will be given. You won’t need to store anything: the yum command accept a url. 1 month 17 days ago
zi
Member
so how should it go? yum update http:…. 1 month 13 days ago
zi
Member
or this
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yum install http:// 1 month 12 days ago
CertDepot
Author
Yes, yum install … 1 month 12 days ago
scruff
Hi there. Sitting a lot of nights at the homelab PC. Member
During the kernel update task the command “rpm -i kernel-xx.rpm” warns me about linux-firmware, xfsprogs and kmod versions conflicts. These 3 RPM’s should be installed before kernel-xx.xx.xx.rpm. After installing xfsprogs, kmod and linux-firmware packages we are finally able to install kernel-xx.rpm. After that the kernel-xx.xx.xx automatically sets to default entry of boot. The previous old kernel is still active under second entry of boot prompts, as required on task. But if I’m applying the command “yum update kernel”, it updates kernel automatically and sets new kernel to default boot… Read more » 24 days 2 hours ago
Sam
Member
“rpm -i kernel-xx.rpm” installs a local package only, hence then need for additional packages “yum update kernel” Install all relevant packages from the repository “yum localinstall kernel-xx.rpm” is a little more flexible. check that one out. 23 days 19 hours ago
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