similar to: Booting back into CentOS-6

Tru Huynh wrote: > On Fri, Jan 01, 2016 at 11:53:51PM +0100, Timothy Murphy wrote: >> My HP MicroServer crashes with a kernel panic >> when booted into kernel-3.10.0-327.3.1.el7.x86_64, >> but runs perfectly under kernel-3.10.0-229.20.1.el7.x86_64 . > AMD Turion64 cpu? > Could be related to: > https://bugs.centos.org/view.php?id=9860 > uptream at

If I boot into CentOS on my home server from a Live CD or USB stick and go to Troubleshoot, it lists OS's it finds on the machine. How does it find these OS's? Presumably it looks through all the partitions on all the hard disks for something that looks like an OS? But how exactly does it identify an OS? -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College,

I have a working CentOS-7 machine. I want to install grub2 on a USB stick (without altering my present system in any way) so that I can boot the present system from the USB stick. Could some kind (and expert) soul explain precisely what to do. If it were possible to boot other systems on the computer as well that would be an added bonus. I did google for this, but all the sites I saw wanted to

Gordon Messmer wrote: > On 07/03/2015 03:43 AM, Timothy Murphy wrote: >> I've tried this again, and it does not seem to work. >> Have you actually tried it? > I don't have a CentOS system here that I can reboot readily. And it > occurs to me that if I did, I didn't ask if your system boots via BIOS > or UEFI. Thanks for your response. It boots via BIOS, and

I have a remote home server updated to CentOS-7.2.1511 (as stated in /etc/redhat-release) but I have not re-booted since the update. The machine is currently running kernel 3.10.0-229.11.1.el7.x86_64. I'm wondering if anyone has advice on any safety steps I can take before re-booting, so that in the event of failure I can give simple instructions to my daughter at the other end on how to get

I'm getting repeated email (KMail) error messages about one apparently over-large post: -------------------------- Received: from helen.gayleard.com (localhost.localdomain [127.0.0.1]) by helen.gayleard.com (Postfix) with ESMTP id E4500294A0 for <tim at helen.gayleard.com>; Sat, 24 Jan 2015 14:00:05 +0000 (GMT) Received: (from tim at localhost) by helen.gayleard.com

Gordon Messmer wrote: > On 07/01/2015 06:02 AM, Timothy Murphy wrote: >> I also tried "sudo grub2-install /dev/sdb" >> but for some reason this did not do the trick. > > That should place a boot loader on sdb that will boot the system. What > behavior did you observe when you tried to boot from that USB drive? I've tried this again, and it does not seem to

Mike - st257 wrote: > On Wed, Jun 3, 2015 at 6:11 AM, Timothy Murphy > <gayleard at eircom.net> wrote: > >> Has the CentOS logo disappeared from CentOS-7? > > You are referring to Plymouth splash screen while booting. > >> I thought the logo in CentOS-6 was very pleasant. Probably. The fact remains that booting was attractive, and now it isn't. --

Has the CentOS logo disappeared from CentOS-7? I thought the logo in CentOS-6 was very pleasant. Also I liked the way in which one increasing circle inside another showed how the boot was progressing. The dots going round and round in Microsoft fashion in CentOS-7 is a retrograde step, I think. One always has the fear it might continue forever. -- Timothy Murphy gayleard /at/ eircom.net School

My HP MicroServer crashes with a kernel panic when booted into kernel-3.10.0-327.3.1.el7.x86_64, but runs perfectly under kernel-3.10.0-229.20.1.el7.x86_64 . I've been trying to save the panic message with kdump, but am not sure how one can configure kdump to do this, if indeed that is possible. -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin

I have a 1.5TB Western Digital hard disk (WD15EADS-00R6B0) on my CentOS-5.7 server, which has become incredibly slow for some operations, eg rsync, BackupPC archive, e2fsck, although it seems to work fine for ordinary file operations, and "smartctl -a /dev/sdb" does not report any errors. For example, running "e2fsck -p /dev/sdb5" on a 250GB partition on this disk took over 24

This, IMHO, is one of the more annoying bugs with the newer GRUB (which i assume is the bootloader you are using). Specifically the newer grub can't, won't boot from a drive other than the one grub is on. suggest you revert to grub 0.97 or, if any boot loader is or can be put on the drive with the 6.5 distro you can make that drive the boot drive in the bios, which is how i do it. i.e.

My CentOS-7 home server has a static IP address. Is there a simple way of organizing the hpptd server so that it is accessible through this address at a remote host, but is accessed at its 192.168 address by a laptop on the WiFi LAN? -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin

Does anyone know if the program stunbdc, which prints one's IP address, is available in CentOS-5? It comes with the libnice package in Fedora-11. ------------------------------ [tim at rose ~]$ stunbdc -4 stun.ekiga.net Server address: 75.101.138.128 port 3478 STUN transaction started (timeout 600ms). STUN unknown: 0 mandatory attribute(s)! Received 88-bytes STUN message No

I'm running httpd-2.4.6-31.el7.centos.1.x86_64 under CentOS-7 (kernel 3.10.0-229.14.1.el7.x86_64). I cannot get the httpd userdir facility working; when I try to access localhost/Menloe I get the message "You don't have permission to access /Menloe on this server." I see in /var/log/httpd/error_log "Symbolic link not allowed or link target not accessible:

I'm trying to install spamassassin on a postfix/dovecot server, running CentOS-6.4, following the instructions at <http://wiki.centos.org/HowTos/Amavisd>. I think I have taken all the steps indicated, and the configuration seems to pass the tests suggested, although the response is much more sparse than that described: ------------------------ [tim at alfred ~]$ telnet localhost 10024

I recently asked about copying a running system to a new drive. As a postscript, I'm wondering if it would have been preferable to run the machine under a Live OS, and simply copy the root partition to the new drive? Eg while running under the LiveOS, # mkdir /mnt/old /mnt/new # mount /dev/sda7 /mnt/old # mount /dev/sdb6 /mnt/new # cp -avx /mnt/old /mnt/new or # rsync -ax

I'm running CentOS-7, but I left some MySQL databases on my old CentOS-6.5 partition which I'd like to retrieve. I assume they are contained in the file /var/lib/mysql/ibdata1 ? Could I just copy this file to /var/lib/mysql in CentOS-7? Or is there some way Mariadb or phpMyAdmin can import mysql databases from a server that is no longer running? -- Timothy Murphy gayleard /at/

I'm getting the (unintelligible to me) error message ipmi_si: Could not set up I/O space ERST: Failed to get Error Log Address Range when I try to boot any OS on the grub menu apart from the one I last installed. (Actually, Windows also boots properly.) I wonder if anyone has had this error message, and worked out where it comes from? I googled for it, and it has come up many times; but

I'm running postfix + dovecot on my CentOS-7 home server. When I send myself a message I get this error message in /var/log/maillog: Aug 9 12:59:57 alfred postfix/lmtp[31336]: B0D02220748: to=<tim at localhost.gayleard.eu>, orig_to=<tim at localhost>, relay=alfred.gayleard.eu[private/dovecot-lmtp], delay=475, delays=474/0.03/0.02/0.09, dsn=4.3.0, status=deferred