Discuss January 2015

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166 participants
145 discussions

Re: [CentOS] how to delete a trashed kernel
by Don Vogt 03 Jan '15

03 Jan '15

Message: 8 On Jan 1, 2015, at 3:49 PM, Don Vogt <dnvot(a)yahoo.com> wrote: > when I select the second kernel it boots OK. Now I would like to remove the bad kernel. The only thing that makes this tricky is that you can?t just say ?rpm -e kernel? because there is more than one ?kernel? package installed. You need to know the exact package name. >> I?m assuming you?re using EL7 and you told it you wanted your user to be a >> trusted admin during install. Otherwise, you might need to su up to root to do >> this. Alas, sudo is not universal: > I have never noticed a "centos-plus" in a kernel name before. Does the centos-plus repo deal out kernels? >>Clearly, the answer is ?yes?. thanks. >> I would appreciate any advice (except "go back to windows?) >You asked for it: Get and read some good books on Linux. I had some books on Unix when I started with Slackware. I downloaded it over Ftp from MIT, I believe it was Slackware 0.8. (maybe 1.0). It came on about 25 floppy disks and (with a 300baud modem) I could only do about two a night. I believe I got in trouble this time while building a centos7 partition. I had some problems getting the music to play and I went back and forth between centos6 and centos7 to see what packages I need (Centos6 was working fine). I think my initial problem was that Rpmforge doesn't have centos7. Thanks for the help. Centos6 and centos7 are now working fine (except 7 only boots about every other try- which I am still working on - I think the bios boot my Hard drives in somewhat random order and I haven't been able to come up with the proper system map -- or it may be a mixup with two SATA drives and an IDE. Pulling the power plug on the IDE drive fixes it.) I will go back to lurking.

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how to delete a trashed kernel
by Don Vogt 03 Jan '15

03 Jan '15

I have a screwed up disk arrangement, but I have had no trouble because of it after using it over a year. Recently I did a yum update. After starting the update, which included a new kernel, it seemed to either freeze or loop. It was a long time at the prompt and I got impatient and did a Ctrl C. I then tried to re-boot. The result was a kernel panic. I am keeping 5 kernels and when I select the second kernel it boots OK. Now I would like to remove the bad kernel. One other thing that I don't understand and may be relevant, the name of the bad package is kernel-2.6.32-504.3.3.el6.centos-plus.i386 I have never noticed a "centos-plus" in a kernel name before. Does the centos-plus repo deal out kernels?I have tried yum remove and "gpk application" (add and remove software) with no luck.I have tried google, but all the solutions for kernel deletions were to delete old kernels. I don't want to do that because I would be deleting my backups. I am in no hurry because I can still boot and it is possible that if I can wait through several kernel updates yum might delete the bad one after an update. I should have mentioned that I am using grub2 to boot, although I don't think that has anything to do with deleting the kernel package.I would appreciate any advice (except "go back to windows")

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ulogd / ulogd packages?
by Adam Tauno Williams 02 Jan '15

02 Jan '15

I am looking for ulog-2.0.x packages and the best I have been able to find [for CentOS6] has been ulog-2.0.0 (which is not an exciting prospect for .0 reasons). Is anyone aware of ulogd packages for CentOS6 [x86_64]? I am kind of surprised this isn't standard fair. -- Adam Tauno Williams <mailto:awilliam@whitemice.org> GPG D95ED383 Systems Administrator, Python Developer, LPI / NCLA

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Secret incantations for virt-viewer?
by Bill Gee 02 Jan '15

02 Jan '15

Hello everyone - I am trying to use virt-viewer to connect to KVM virtual machines running on a CentOS7 host. It works great when running directly on the host, but I have not been able to figure out the magic connection string to make it work from another computer. On the host, I set selinux to "permissive" and stopped the firewalld service. No change, so it is not related to them. Almost every command I try gives an immediate dialog box that says "Unable to connect to libvirt with URI ...". The only command line that gets me anything different is this: virt-viewer --connect xen+ssh://root@practice7.billgee.local/ dd2a2ba7-707d-42b5-8c83-94b11ce6e269 This will ask me for the root password on the host machine and then gives me the same "Unable to connect" message. I tried it with a regular user account instead of root and got the same result. I have tried it with and without the "root@" string. I tried using both the UUID and the domain name of the guest. I tried all of the following protocols: ssh:// qemu:// qemu:/// xen:// xen+ssh:// qemu_ssh:// qemu+ssh:// If I open a regular ssh shell using the +X parameter and then launch virt- viewer, it works. The connection string in that case is --connect=qemu:///system Any suggestions? Thanks - Bill Gee

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Happy New Year!
by Ljubomir Ljubojevic 01 Jan '15

01 Jan '15

On behalf of the CentOS project I wish you Happy New Year! Happy New Year! -- Ljubomir Ljubojevic (Love is in the Air) PL Computers Serbia, Europe StarOS, Mikrotik and CentOS/RHEL/Linux consultant

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Discuss January 2015