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Kernel Updates
by Michael Rapuano 11 Sep '17

11 Sep '17

We are running kernel-3.10.0-514.26.2.el7 and need to update to kernel-3.10.0-693.el7. The new kernel is in the CR repo but not in the base/update repos. When will the updates in the CR repo be in the base/update repos? This is a high priority security issue for us. -- Michael Rapuano michael.rapuano(a)cloudlock.com

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centos-7.4 elfutils
by Jack Bailey 11 Sep '17

11 Sep '17

Hello, I'm taking 7.4 for a spin. I did the minimal install, and ran into trouble with groupinstall base. The trouble seems to stem from elfutils. One command claims elfutils-libs-0.166-2.el7.x86_64 is missing, and another one claims it's installed. Not sure what's going on here. [root@ip-172-31-34-187 ~]# yum -y install elfutils.x86_64 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.web-ster.com * extras: mirror.chpc.utah.edu * updates: mirrors.cat.pdx.edu Resolving Dependencies --> Running transaction check ---> Package elfutils.x86_64 0:0.166-2.el7 will be installed --> Processing Dependency: elfutils-libs(x86-64) = 0.166-2.el7 for package: elfutils-0.166-2.el7.x86_64 --> Processing Dependency: elfutils-libelf(x86-64) = 0.166-2.el7 for package: elfutils-0.166-2.el7.x86_64 --> Finished Dependency Resolution Error: Package: elfutils-0.166-2.el7.x86_64 (base) Requires: elfutils-libelf(x86-64) = 0.166-2.el7 Installed: elfutils-libelf-0.168-8.el7.x86_64 (@anaconda) elfutils-libelf(x86-64) = 0.168-8.el7 Available: elfutils-libelf-0.166-2.el7.x86_64 (base) elfutils-libelf(x86-64) = 0.166-2.el7 Error: Package: elfutils-0.166-2.el7.x86_64 (base) Requires: elfutils-libs(x86-64) = 0.166-2.el7 Installed: elfutils-libs-0.168-8.el7.x86_64 (@anaconda) elfutils-libs(x86-64) = 0.168-8.el7 Available: elfutils-libs-0.166-2.el7.x86_64 (base) elfutils-libs(x86-64) = 0.166-2.el7 You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest [root@ip-172-31-34-187 ~]# yum -y install elfutils-libs.x86_64 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.web-ster.com * extras: mirror.chpc.utah.edu * updates: mirrors.cat.pdx.edu Package matching elfutils-libs-0.166-2.el7.x86_64 already installed. Checking for update. Nothing to do

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SNMP V3 libraries not found, SNMPV3 disabled.
by Alex Tang 11 Sep '17

11 Sep '17

Dear all, I have installed mrtg via yum on centos 7, and using cron job to load mrtg every 5 mins. Everything work fine but just snmp v3 graph no show up. I try to load the command LAND=C /usr/bin/mrtg /etc/mrtg/metg.cfg it will show an error "SNMP V3 libraries not found, SNMPV3 disabled.". so, i installed all the net-snmp but still showing the error. I can't find any suggestion on google. can anyone have the same problem ? Thanks Alex

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systemctl poweroff
by Nicolas Kovacs 11 Sep '17

11 Sep '17

Hi, I've been using CentOS since versions 4.x, and I see a weird trend in recent Linux distributions. Under CentOS 4.x, 5.x and 6.x, shutting down a server (workstation, laptop) simply meant issuing 'shutdown -h now' (or choosing 'Shutdown' from the GUI menu), and the machine would simply shut down. Whatever crazy process went haywire, shutting down the system meant exactly that. No questions asked. Now with CentOS 7.x, sometimes the machine would simply hang during the shutdown process, or I would get a message like "a stop job is running", and I would end up having to hit the Reset button to stop the system, as I did when I used Microsoft Windows (before 2001). Cheers, Niki Kovacs -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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Flush memory on a server?
by Nicolas Kovacs 11 Sep '17

11 Sep '17

Hi, A few days ago I checked the health of my main public server running CentOS 7, a quad-core machine with 16 GB RAM. It had been running non-stop for 65 days, hosting only a handful of services (BIND, NTP, Apache, Postfix, Dovecot) for two domains. I was surprised to see that RAM consumption was relatively high, and apparently, the machine even had to swap at some time. I read up a bit on RAM consumption, and now I wonder if flushing the memory cache regularly is a good idea. https://tecadmin.net/flush-memory-cache-on-linux-server/ Any suggestions? Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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CentOS 7 on PPC64le booting from a MD RAID volume
by Tom Leach 08 Sep '17

08 Sep '17

I've been trying to install CentOS 7 AltArch ppc64le onto a new Power 8 system and I want to configure mdraid for the volumes. I can get everything working if I install to a single disk, but when I configure for RAID 1, the system fails to boot. So, is mdraid1 supported for booting a Power 8 system? Tom Leach leach(a)coas.oregonstate.edu

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Re: [CentOS] login case sensitivity
by James B. Byrne 08 Sep '17

08 Sep '17

On Thu, September 7, 2017 14:07, hw wrote: > Gordon Messmer wrote: >> On 09/07/2017 08:11 AM, Stephen John Smoogen wrote: >>> This was always problematic because DNS hostnames and >>> email addresses in the RFC standards were case insensitive >> >> >> Not quite. SMTP is required to treat the "local-part" of the RCPT >> argument as case-sensitive, and to preserve case when relaying mail. >> The destination is allowed to treat addresses according to local >> policy, but in general SMTP is case sensitive with regard to the >> user identifier. > > Last time I checked, RFCs said that local parts *should not* be case > sensitive, and cyrus defaulted to treat them case sensitive, which > is a default that usually needs to be changed because senders of > messages tend to not pay any attention to the case sensitiveness > of recipient addresses at all, which then confuses them like any > other error. > > https://tools.ietf.org/html/rfc5321 Updated by: 7504 DRAFT STANDARD Errata Exist Network Working Group J. Klensin Request for Comments: 5321 October 2008 Obsoletes: 2821 Updates: 1123 Category: Standards Track . . . 2.4. General Syntax Principles and Transaction Model . . . Verbs and argument values (e.g., "TO:" or "to:" in the RCPT command and extension name keywords) are not case sensitive, with the sole exception in this specification of a mailbox local-part (SMTP Extensions may explicitly specify case-sensitive elements). That is, a command verb, an argument value other than a mailbox local-part, and free form text MAY be encoded in upper case, lower case, or any mixture of upper and lower case with no impact on its meaning. __The local-part of a mailbox MUST BE treated as case sensitive.__ Therefore, SMTP implementations MUST take care to preserve the case of mailbox local-parts. In particular, for some hosts, the user "smith" is different from the user "Smith". However, exploiting the case sensitivity of mailbox local-parts impedes interoperability and is discouraged. Mailbox domains follow normal DNS rules and are hence not case sensitive. . . . Case munging of the local part is handled by the local delivery agent in my experience. The Cyrus LMTP service can be, and often is, configured to force lower case munging (imapd.conf 'lmtp_downcase_rcpt: 1') of the local part. That decision is site specific. -- *** e-Mail is NOT a SECURE channel *** Do NOT transmit sensitive data via e-Mail Do NOT open attachments nor follow links sent by e-Mail James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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intel wireless 3165 and CentOS 7.3
by Jerry Geis 08 Sep '17

08 Sep '17

I am trying to get wireless working on CentOS 7.3 with intel wireless 3165 ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000 link/ether b8:ae:ed:77:b3:3a brd ff:ff:ff:ff:ff:ff 3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000 link/ether 34:02:86:cc:a0:79 brd ff:ff:ff:ff:ff:ff 4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT qlen 1000 link/ether 52:54:00:70:8f:48 brd ff:ff:ff:ff:ff:ff 5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue master virbr0 state DOWN mode DEFAULT qlen 500 link/ether 52:54:00:70:8f:48 brd ff:ff:ff:ff:ff:ff lspci 00:00.0 Host bridge: Intel Corporation Device 2280 (rev 21) 00:02.0 VGA compatible controller: Intel Corporation Device 22b1 (rev 21) 00:13.0 SATA controller: Intel Corporation Device 22a3 (rev 21) 00:14.0 USB controller: Intel Corporation Device 22b5 (rev 21) 00:1a.0 Encryption controller: Intel Corporation Device 2298 (rev 21) 00:1b.0 Audio device: Intel Corporation Device 2284 (rev 21) 00:1c.0 PCI bridge: Intel Corporation Device 22c8 (rev 21) 00:1c.1 PCI bridge: Intel Corporation Device 22ca (rev 21) 00:1c.2 PCI bridge: Intel Corporation Device 22cc (rev 21) 00:1f.0 ISA bridge: Intel Corporation Device 229c (rev 21) 00:1f.3 SMBus: Intel Corporation Device 2292 (rev 21) 02:00.0 Network controller: Intel Corporation Wireless 3165 (rev 81) 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15) I have created the ifcfg-ESSID and keys-ESSID files. but I dont even thing the wireless is loading. ifconfig does not report wlan0 or anything. What am I missing to get wireless going? Thanks, Jerry

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08 Sep '17

hello, some users' login fails since they type upper case for their user ids ,etc ... how can case sensitivity be disabled so they can login with mix of upper and lower case? this is what i tried: in /etc/sssd/sssd.conf i tested this below [domain/default] case_sensitive = false i stopped sssd, deleted all inside /var/sss/db and started sssd but that did not help .... thank you, F-

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installing lxqt on CentOS-7
by Fred Smith 07 Sep '17

07 Sep '17

I see that epel has a bunch of lxqt packages,, but there doesn't seem to be a lxqt group. if I try to install lxqt-* it of course wants to install a whole shipload of stuff alongside it. does anyone here happen to know the correct incantation for getting lxqt onto a C7 system without unnecessary crap? thanks in advance! Fredex -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- "For him who is able to keep you from falling and to present you before his glorious presence without fault and with great joy--to the only God our Savior be glory, majesty, power and authority, through Jesus Christ our Lord, before all ages, now and forevermore! Amen." ----------------------------- Jude 1:24,25 (niv) -----------------------------

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