Discuss July 2019

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78 participants
65 discussions

Re: [CentOS] upg. CentOS 7.5 to 7.6: unable to mount smb shares - samba NT domain member using ldap
by Gordon Messmer 27 Jan '20

27 Jan '20

On 1/2/19 12:09 PM, Miroslav Geisselreiter wrote: > some parameters from smb.conf: > [global] > workgroup = NT4DOMAIN > netbios name = nt4member > security = domain > passdb backend = ldapsam:"ldap://ldap1server.intranet.xx > ldap://ldap2server.intranet.xx" I'm not sure it makes sense to use "security = domain" with an ldap passdb backend. If you're using a real NT4 domain, then you shouldn't need a passdb backend at all. If you're not in an NT4 domain, then you should set "security = USER". The man page for smb.conf notes "This mode will only work correctly if net(8) has been used to add this machine into a Windows NT Domain." Did you add this host to a Windows NT domain, using "net join ..."?

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CentOS 7.6 1810 vs. VirtualBox : bug with keyboard layout selection
by Nicolas Kovacs 20 Jan '20

20 Jan '20

Hi, I'm currently working on my next Linux book, which will be an elementary course about CentOS administration. I'm using VirtualBox for all the installer screenshots. Since CentOS has recently been upgraded to version 7.6, I thought I might as well base all book references on this version. So I downloaded the 7.6 1810 minimal ISO and started a fresh installation in VirtualBox. I'm using a Swiss French keyboard layout (ch-fr or fr_CH-latin1), so one of the first things I do in the installer is replace the default French AZERTY keyboard (since I use the french language) by a swiss french QWERTZ layout. Now when I reach this dialog in the installer and try do define my new layout, the slider in the selection window doesn't appear, and clicking on any of the first layouts doesn't do anything, so I'm basically stuck there. I'm running OpenSUSE Leap 15.0 KDE on my workstation, so I tried the same thing with the previous CentOS 7.5 1804 minimal ISO, and the keyboard selection dialog works perfectly. So my intuition would tell me that there's a nasty bug in the CentOS 7.6 installer. Maybe it went unnoticed, since most folks stick to the default keyboard layout selected in their language. Any suggestions ? Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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CentOS 7 as a Fibre Channel SAN Target
by Steffan A. Cline 02 Jan '20

02 Jan '20

For quite some time I’ve been using FreeNAS to provide services as a NAS over ethernet and SAN over Fibre Channel to CentOS 7 servers each using their own export, not sharing the same one. It’s time for me to replace my hardware and I have a new R720XD that I’d like to use in the same capacity but configure CentOS 7 as a Fibre Channel target rather than use FreeNAS any further. I’m doing virtualization and this will allow me to have failover from one node to the other since they’ll all be sharing the same export rather than me simply backing up to the FreeNAS server the way I am now. Does anyone know of any really good current articles that explain how to set up CentOS 7 as the target in such a configuration and also setting up CLVMd so they can all share an export over Fibre Channel from CentOS 7? Steffan A. Cline steffan(a)hldns.com 602-793-0014

2 1

UEFI and PXE
by isdtor 25 Oct '19

25 Oct '19

We have a working PXE setup. I've tried to adapt it to UEFI as per RHEL6 manual, but the client won't boot. Strangely, tcpdump shows that the client tries to download all files via tftp from the dhcp server rather than the tftp server (they are different). next-server is pointing to the tftp server. Any clues?

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Centos 7 on Dell Latitude E6500
by Rainer Fügenstein 09 Oct '19

09 Oct '19

Hi, I tried to install Centos7 x86_64 minimal 1503-01 from an USB flash drive on my old Dell Latitude E6500 laptop. boots up in text mode, switches text resolution, writes: Started Show Plymouth Boot Screen Reached Target Paths Reached Target Basic System. then hangs for some time, eventually starting dracut emergency shell. log says: multipathd: sdb: spurious uevent, path already in pathvec multipathd: sda: spurious uevent, path already in pathvec interesting: sdb is the internal 240GB kingston SSD drive (existing ntfs bitlocker partition recognized as sdb1) sda is the write protected USB stick, recognised as CDROM drive. 4GB rom intel 45 express chipset mobile intel GMA 4500MHD graphics intel 5100AGN wifi what to try next? any additional infos I can give you? thnx in advance. -- Best regards, Rainer mailto:rfu@oudeis.org

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/boot partition too small
by KM 02 Oct '19

02 Oct '19

First off - let me say I am not an administrator. I need to know if there is an easy way to increase my /boot partition. When I installed CentOS 6 after running 5, it was my oversight not to increase the /boot size. it's too small and I can't do yum updates. if it's not easy to actually increase it, is it safe to take a chunk in my root filesystem (like /new.boot or something) and just mount it as /boot from now on so it uses the space or is that not a good idea? I am sure I could easily copy the rpms/kernel stuff over to it and then unmounts the real /boot and mount this new area as /boot. Can you administrators let me know what you think of all this? Thanks in advance. KM

27 44

Mate on Centos 7
by H 07 Aug '19

07 Aug '19

I have been running Mate on Centos 7 for some time but it does not work very well on my HiDPI laptop screen. Today I found that I am running version 1.16 of Mate whereas the current version is 1.22. Undoubtedly many of the issues have been fixed since 1.16 was released in 2016... However, EPEL only provides 1.16 - a release from 2016 - and nothing later. What is the recommended way to upgrade to 1.22?

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CentOS 8 partiitioning for reliability
by Kenneth Porter 01 Aug '19

01 Aug '19

I was just given a Dell R720xd with 160 GB memory and 12x 900 GB drives that I plan to deploy as my home mail/file/backup server to replace an aging Supermicro server running CentOS 7. Yeah, it's gross overkill for that and I expect to tuck most of the drives away for spares. How should I RAID and partition this beast for maximum reliability? My current C7 system is using 1 TB of 2 TB capacity on the root partition (4x 1 TB drives in RAID 10). /boot is 300MB/50GB. Memory and swap is 8GB each.

3 3

Installation question?
by John Chludzinski 01 Aug '19

01 Aug '19

I've been doing a CentOS 7.6.1810 net-install since last night. The machine seems ok but has been stuck with "performing post-installation setup tasks" for hours. This is an old Dell T5400 box, so it isn't blazing fast but ... Is there a way to pull up its skirt (so to speak) and check/monitor the installation activity while installing it? Having already started the installation? BTW, in the phase of the install process, is it still hitting the net?

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FYA (for your amusement)
by mark 30 Jul '19

30 Jul '19

Well, we knew the 'Net was invented solely for cute cat pictures. Now I have proof that selinux is part of that conspiracy. From dmesg, on one of my servers: [ 3366.091561] SELinux: 8 users, 14 roles, 5031 types, 316 bools, 1 sens, 1024 cats mark

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Discuss July 2019