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CentOS-7-x86_64-dvd-2009.iso is too big for DVD blanks
by Robert G. (Doc) Savage 18 Mar '21

18 Mar '21

I need help from someone experienced with the CentOS bug tracking system. I gotta say it is one of the most complicated and imposing front ends I've ever seen. Could anyone familiar with it please file a bug on my behalf? Particulars: "CentOS 7.9.2009 DVD iso image too large" ISO image: CentOS-7-x86_64-DVD-2009.iso 4.7GB raw CD image Wed Nov 4 05:37:25 2020 Burners: Both K3B and Brasero Media: Both DVD-R and DVD+R single-layer disks iso image: 4,712,300,544 bytes User Anthony F McInerney advises Wikipedia says DVD-R capacity: 4,707,319,808 bytes (max) I have tried burning this same iso image on two different machines: a CentOS 7.9 server and a Fedora 33 laptop. Same failure on both. We need to ask the developers to make a re-spin that's about 5MB smaller. And before someone suggests it, the 2010-vintage server I'm trying to install CentOS on does not support booting from a thumb drive, so that option is not available. Thanks, --Doc Savage Fairview Heights, IL

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Re: [CentOS] CentOS 7.3
by Mark Woolfson 18 Mar '21

18 Mar '21

Hello, I wonder if you could help. I have a requirement to load CentOS 7.3 on to a server. I have the distribution on a bootable USB key. CentOS boots to the first menu but when I select the option to install almost immediately I get the error below: NMI watchdog: BUG: soft lockup - CPU#82 stuck for 23s! [system-udevd:1221] The above error is output every 23s This is a repeatable error condition. When I load CentOS 7.4 on to the server I get no problems. When I load the above CentOS 7.3 distribution on to an older server I get no problems. Has anyone every seen the NMI watchdog error and found a resolution. Thank you in advance, Mark -- This email has been checked for viruses by AVG. https://www.avg.com

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Re: [CentOS] CentOS-7-x86_64-dvd-2009.iso is too big for DVD blanks
by Michael Hennebry 17 Mar '21

17 Mar '21

Supergrub will boot some .iso files. In the past, I have directly booted a partition I made from a fedora .iso file. Another option *might* be making another .iso file. Mount the file. Copy its filesystem to a directory. Remove some stuff you can live without. Make another .iso file using directions for making a bootable disk. Burn the .iso file to disk. -- Michael hennebry(a)web.cs.ndsu.NoDak.edu "Sorry but your password must contain an uppercase letter, a number, a haiku, a gang sign, a heiroglyph, and the blood of a virgin." -- someeecards

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Re: [CentOS] new observations: Re: Centos 7 installer alert! message
by R C 17 Mar '21

17 Mar '21

Hi Chris, I just checked, no there no memory/ram/DIMMs mentioned in boot.log. Ron On 3/17/21 12:28 PM, Christopher Wensink wrote: > Is it in boot.log? > > Chris > > On 3/17/2021 1:14 PM, R C wrote: >> Hello, >> >> >> I installed 72G ram in a Dell (it canhandle 72G according to Dell). >> The BIOS says there are 9 8G DIMMs install (BIOS test shows no >> errors). dmidecode says there are indeed 9 DIMMs, and they show all >> fine, no errors etc. However, free reports tehre's only 54G available. >> >> So I (I am guessing) that alert message has something to do with >> ram/memory, but still wasn't able to actually read it since it >> disappears really quick. >> >> Any ideas what the culprit here could be? >> >> >> thanks, >> >> >> Ron >> >> On 3/16/21 9:08 PM, R C wrote: >>> When I install Centos 7, I see an "alert!" message flash by, too >>> fast to read it. Is there a way to figure out what that message >>> is/was (after install) or make it wait so I can actually read it? >>> >>> >>> thanks, >>> >>> >>> Ron >>> >> _______________________________________________ >> CentOS mailing list >> CentOS(a)centos.org >> https://lists.centos.org/mailman/listinfo/centos >> >

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Re: [CentOS] new observations: Re: Centos 7 installer alert! message
by R C 17 Mar '21

17 Mar '21

right, I did that, I don't see any errors in dmesg On 3/17/21 12:30 PM, Binet, Valere (NIH/NIA/IRP) [C] wrote: > Hi Ron, > > I replied to the list but I've come to believe my emails to the list don't go through. > Anyway, my reply was: > I assume you already looked and didn't find anything in dmesg, right? > > Please post to the list if it’s of any help. Thank you, > > Valère Binet > > On 3/17/21, 2:16 PM, "R C" <cjvijf(a)gmail.com> wrote: > > Hello, > > > I installed 72G ram in a Dell (it canhandle 72G according to Dell). The > BIOS says there are 9 8G DIMMs install (BIOS test shows no errors). > dmidecode says there are indeed 9 DIMMs, and they show all fine, no > errors etc. However, free reports tehre's only 54G available. > > So I (I am guessing) that alert message has something to do with > ram/memory, but still wasn't able to actually read it since it > disappears really quick. > > Any ideas what the culprit here could be? > > > thanks, > > > Ron > > On 3/16/21 9:08 PM, R C wrote: > > When I install Centos 7, I see an "alert!" message flash by, too fast > > to read it. Is there a way to figure out what that message is/was > > (after install) or make it wait so I can actually read it? > > > > > > thanks, > > > > > > Ron > > > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > https://lists.centos.org/mailman/listinfo/centos >

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Samba config question
by Robert G. (Doc) Savage 16 Mar '21

16 Mar '21

After setting up /etc/samba/smb.conf and running "testparm" in CentOS 7.9.2011, I have noticed that the list of parameters echoed back for the [global] section do not match those in the smb.conf file. Is this normal? [global] in /etc/samba/smb.conf: unix charset = UTF-8 dos charset = CP932 vfs objs = acl_xattr map acl inherit = yes store dos attributes = yes printing = cups printcap = cups load printers = yes # Network related options workgroup = WORKGROUP server string = Samba Server Version %v netbios name = SERVER01 interfaces = lo eth0 192.168.1.0/24 hosts allow = 127. 192.168.1. # Logging options log file = /var/log/samba/log.%m max log size = 50 # Standalone Server Options security = user passdb backend = tdbsam map to guest = Bad User # Name Resolution wins support = yes dns proxy = yes # Printing options load printers = yes cups options = raw # Filesystem options map archive = no map hidden = no map read only = no map system = no store dos attributes = yes When I subsequently run "testparm", I get a shorter and in some cases different list: [global] in "testparm" output: dos charset = CP932 interfaces = lo eth0 192.168.1.0/24 log file = /var/log/samba/log.%m map to guest = Bad User max log size = 50 printcap name = cups security = USER server string = Samba Server Version %v wins support = Yes idmap config * : backend = tdb cups options = raw hosts allow = 127. 192.168.1 map acl inherit = Yes map archive = No vfs objects = acl_xattr Is this normal behavior for Samba? I am particularly concerned about workgroup = WORKGROUP missing in the "testparm" output. V/R --Doc Savage Fairview Heights, IL

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Re: [CentOS] Bare metal vs. virtualization: Proxmox + Ceph + CentOS?
by Blaž Bogataj 15 Mar '21

15 Mar '21

Hello I'm using ProxMox as virtualization, from verson 2.x. For around 20 servers (most of them are Centos machines) for different services (Zimbra, Apache, MariaDB, PostgreSQL, EDB, ..) and also for MS servers (AD, Exchange, fileserver, MSSql Express, .). They all are running on 5-6 HW servers, different brands and all of them are pretty old. As backup use Synology NAS and nfs with 10gb fc to FC switch. So speed for backup really is not a problem. I slowly moving sata disks to ssd, in same hardware and this is really big advantage in speed. In time of changing disks move virtual machines to other hypervisors. HW Raid5 is really nice with ssd. In 3 years of changing to ssd disks only one fail, but system running and change of disk without downtime ... If I want to test, move, . backup and restore is not an issue. For this year plan is to put one NAS to other location for disaster . ProxMox and software defined storage on 4-5 machines I think for us is the best solution. In point of maintaining there is no problem with upgrading from one release to other - now is version 6.x. Only issue is probably my knowledge how to put this together. All the best Blaz

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Restore mails using Thunderbird
by Nicolas Kovacs 15 Mar '21

15 Mar '21

Hi, One of my clients is running CentOS 7 on his workstation. He's using Mozilla Thunderbird with an IMAP account at Infomaniak to manage his mails. Two days ago he shot himself in the foot by playing around with Thunderbird's auto-cleaning features. He enabled "delete all mails older than 60 days" and managed to wipe most of his 13 GB of archived mails. Fortunately his local network has a local backup server (running CentOS 7 and Rsnapshot), which keeps daily snapshots of his workstation. Thunderbird keeps all configuration and mail in ~/.thunderbird, so I simply renamed this to ~/.thunderbird.bak, searched for the latest correct version of ~/.thunderbird three days ago and restored that. Now here's what happens. 1. When starting Thunderbird all the old mail folders and messages appear correctly. So it looks good. 2. After a few minutes most of the messages disappear. Not good. I don't know exactly what's going on here, but it looks like the server is trying to keep the upper hand here by restoring the last (wrong) state of things. Any suggestions ? 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 Mob. : 06 51 80 12 12

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remote disk decryption on centos?
by ept8ept8＠secmail.pro 15 Mar '21

15 Mar '21

Hi I was reading about how unlock encrypted root partition from remote (unattended). I'd like asking what is compatible way for this in centos and commonly used by administrators? I think most simple is install dropbear in initramfs for allow remote SSH and manual enter passphrase. I find many HOWTO for that on debian/ubuntu, but nothing for centos. Is there any help, recommend or HOWTO available for centos? Example reference: https://security.stackexchange.com/questions/161974/unattended-disk-encrypt…

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Expand XFS filesystem on CentOS Linux release 8.2.2004 (Core)
by Kaushal Shriyan 14 Mar '21

14 Mar '21

Hi, Is there a way to expand xfs filesystem /dev/nvme0n1p2 which is 7.8G and occupy the remaining free disk space of 60GB? [root@ip-10-0-0-218 centos]# df -hT --total Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 1.7G 0 1.7G 0% /dev tmpfs tmpfs 1.7G 0 1.7G 0% /dev/shm tmpfs tmpfs 1.7G 23M 1.7G 2% /run tmpfs tmpfs 1.7G 0 1.7G 0% /sys/fs/cgroup */dev/nvme0n1p2 xfs 7.8G 7.0G 824M 90% /* ----> expand /dev/nvme0n1p2 which is 7.8G and occupy the remaining free disk space of 60GB. /dev/nvme0n1p1 vfat 599M 6.4M 593M 2% /boot/efi tmpfs tmpfs 345M 0 345M 0% /run/user/1000 total - 16G 7.0G 8.5G 46% - [root@ip-10-0-0-218 centos]# fdisk -l GPT PMBR size mismatch (20971519 != 125829119) will be corrected by write. The backup GPT table is not on the end of the device. This problem will be corrected by write. *Disk /dev/nvme0n1: 60 GiB*, 64424509440 bytes, 125829120 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: E97B9FFA-2C13-474E-A0E4-ABF1572CD20C Device Start End Sectors Size Type /dev/nvme0n1p1 2048 1230847 1228800 600M EFI System /dev/nvme0n1p2 1230848 17512447 16281600 7.8G Linux filesystem /dev/nvme0n1p3 17512448 17514495 2048 1M BIOS boot [root@ip-10-0-0-218 centos]# cat /etc/redhat-release CentOS Linux release 8.2.2004 (Core) [root@ip-10-0-0-218 centos]# Please suggest. Thanks in Advance. Best Regards, Kaushal

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