Discuss October 2017

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128 participants
115 discussions

systemd-networkd issue
by Phil Manuel 05 Oct '17

05 Oct '17

Hi, If I disable ipv6 via the kernel command line, ipv6.disable=1, then systemd-networkd fails to bring up any interfaces. Removing the option and networking works as expected. Phil.

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Re: [CentOS] Voice/Fax Modem advice
by david 04 Oct '17

04 Oct '17

At 10:20 AM 10/4/2017, you wrote: >On Wed, 4 Oct 2017, Jose Maria Terry Jimenez wrote: > >>El 4/10/17 a las 17:45, david escribi?: >> >>>Folks >>>A have a PCIe modem (Conexant ChipSet, PCI id = 14f1:2f83.? It >>>interfaces to my land-line (POTS) telephone line in the United >>>States.? On Windows, I had a good answering machine package >>>(Ventafax) that reported CallerID, recorded messages, >>>sent/received fax, and had a scripting language that let me say >>>"To leave a message for Alice, press 1; to leave a message for >>>Bob, press 2", etc. >>>I'm trying to move this function to a Centos-based system without >>>going to the expense or complexity of Asterisk (expense because of >>>specialized telephony cards). >>>My research found a driver (at www.linuxant.com) but it required >>>that I recompile the driver.? I got absolutely lost trying to >>>follow the directions which seemed to be steering me towards a custom Kernel. >>>So, my question to the group wisdom is: >>>- Is there any hope in trying to find a suitable driver for this >>>device without building a custom kernel?? And if a custom "module" >>>is needed, I might need help compiling it. >>>- Is there a inexpensive modem that Centos 7 supports with the >>>needed functions?? and maybe some software applications that might help? >>>Thanks in advance. >>>David >>Hello >> >>You can install an Asterisk with a "mini-gateway" like >>http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adap… >>And is not so complex write a dialplan for the functions you say. >>There is many tutorial over the HT503 and Asterisk in the wild! > >I know this is not the answer you are looking for but the standalone ATA's >are not very expensive and there is http://nerdvittles.com/ to help you get >going. This guy gives you various Centos, Debian, raspberry pi based iso's and >other cookbooks to easily build your own PBX. The good news is most of it >"just works" as long as you understand the terminology. > >I have had good luck with the Obihai 202 ATA. Never could get good >call quality from the grandstream stuff but maybe that is just me. > >HTH, > >-- >Tom me(a)tdiehl.org Interesting reference, but I see nothing that talks about using my POTS (plain old telephone service) from the local phone company as where my phone activity is. I do NOT use VOIP, SIP, nor a bunch of other acronyms. David

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OT: some thread on FreeBSD-questions mail list
by Valeri Galtsev 04 Oct '17

04 Oct '17

Someone started some discussion on FreeBSD-questions mail list that may chime in with some sysadmins on this mail list, so I decided to pass it alone: https://lists.freebsd.org/pipermail/freebsd-questions/2017-October/279108.h… Sorry about spam (those who consider it spam). Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++

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Re: [CentOS] how to prevent files and directories from being deleted?
by James B. Byrne 04 Oct '17

04 Oct '17

On Tue, October 3, 2017 13:12, hw wrote: > Alexander Dalloz <ad+lists(a)uni-x.org> writes: > >> Am 01.10.2017 um 17:21 schrieb hw: >>> Hi, >>> >>> how can I prevent files/directories like /var/run/mariadb from >>> being deleted on reboot? Lighttpd has the same problem. >>> >>> This breaks services and makes servers non-restartable by anyone >>> else but the administrator who needs to re-create the needed >>> files and directories every time and has to figure out what >>> selinux labels they need. This causes unnecessary downtimes. >>> >>> This is entirely inacceptable. This totally sucks. It will help you to avoid future unpleasant surprises if you take the time to read up on the Hierarchical File System (HFS) and its relation the Filesystem Hierarchy Standard (FHS). The directories /run and /var/run, which should be the same place on properly configured systems, are solely to be used for run-time data ONLY. The phrase run-time implies ephemeral data that is not preserved between restarts of the service much less reboots. -- *** 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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multipath
by Tony Schreiner 03 Oct '17

03 Oct '17

I have inherited a system set up with multipath, which is not something I have seen before so I could use some advice The system is a Dell R420 with 2 LSI SAS2008 HBAs, 4 internal disks, and a MD3200 storage array attached via SAS cables. Oh and CentOS 6 lsblk shows the following: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sdd 8:48 0 931.5G 0 disk ├─sdd1 8:49 0 931.5G 0 part └─mpathi (dm-0) 253:0 0 931.5G 0 mpath sdc 8:32 0 931.5G 0 disk ├─sdc1 8:33 0 1000M 0 part /boot ├─sdc2 8:34 0 31.3G 0 part / ├─sdc3 8:35 0 31.3G 0 part [SWAP] ├─sdc4 8:36 0 1K 0 part ├─sdc5 8:37 0 184.5G 0 part /home └─sdc6 8:38 0 683.6G 0 part /data01 sde 8:64 0 931.5G 0 disk ├─sde1 8:65 0 931.5G 0 part └─mpathj (dm-1) 253:1 0 931.5G 0 mpath └─mpathjp1 (dm-8) 253:8 0 931.5G 0 part /data02 sdf 8:80 0 931.5G 0 disk ├─sdf1 8:81 0 931.5G 0 part └─mpathk (dm-2) 253:2 0 931.5G 0 mpath sda 8:0 0 51T 0 disk ├─sda1 8:1 0 12.8T 0 part ├─sda2 8:2 0 12.8T 0 part ├─sda3 8:3 0 12.8T 0 part ├─sda4 8:4 0 12.8T 0 part └─mpathe (dm-3) 253:3 0 51T 0 mpath ├─mpathep1 (dm-4) 253:4 0 12.8T 0 part /SAN101 ├─mpathep2 (dm-5) 253:5 0 12.8T 0 part /SAN102 ├─mpathep3 (dm-6) 253:6 0 12.8T 0 part /SAN103 └─mpathep4 (dm-7) 253:7 0 12.8T 0 part /SAN104 sdb 8:16 0 51T 0 disk ├─sdb1 8:17 0 12.8T 0 part ├─sdb2 8:18 0 12.8T 0 part ├─sdb3 8:19 0 12.8T 0 part ├─sdb4 8:20 0 12.8T 0 part └─mpathe (dm-3) 253:3 0 51T 0 mpath ├─mpathep1 (dm-4) 253:4 0 12.8T 0 part /SAN101 ├─mpathep2 (dm-5) 253:5 0 12.8T 0 part /SAN102 ├─mpathep3 (dm-6) 253:6 0 12.8T 0 part /SAN103 └─mpathep4 (dm-7) 253:7 0 12.8T 0 part /SAN104 sda and sdb are two views of the unit on the MD, sdc is the boot and root disk, one of the disks sde (mpathj) has a mounted file system, the remaining two do not. here is df: Filesystem Type Size Used Avail Use% Mounted on /dev/sdc2 ext4 31G 26G 4.0G 87% / tmpfs tmpfs 16G 92K 16G 1% /dev/shm /dev/sdc1 ext4 969M 127M 793M 14% /boot /dev/sdc6 ext4 673G 242G 398G 38% /data01 /dev/mapper/mpathjp1 ext4 917G 196G 676G 23% /data02 /dev/sdc5 ext4 182G 169G 3.9G 98% /home /dev/mapper/mpathep1 ext4 13T 11T 1005G 92% /SAN101 /dev/mapper/mpathep2 ext4 13T 5.0T 7.0T 42% /SAN102 /dev/mapper/mpathep3 ext4 13T 4.9T 7.1T 42% /SAN103 /dev/mapper/mpathep4 ext4 13T 8.2T 3.8T 69% /SAN104 So a few questions: Is there any value in using multipath on the 4 internal drives; do they actually have multiple data paths? Why does multipath not create a mpath device for the system disk sdc, there is no blacklist in the mulitpath.conf file. If I do a dry-run mulitpath -d command, it sets up mpathh on sdc, but apparently not on boot. Why not? I should say that the system has not been rebooted since well before I took it over, it has been up for over 400 days. the sdd and sdf disks have a single partition, but apparently no mpath device for the partition, how to I create one? Thanks in advance

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Yum java-devel not listed installed
by david 03 Oct '17

03 Oct '17

Folks I performed an install of "java-devel". Several packages got installed. So far so good. Yet, when I performed yum list installed | grep java-devel and also yum rpm -qa | grep java-devel it did not show up as already installed. This behavior appears both on Centos7 and Centos6. This bothers me because as a time-saving effort, I maintain the last output of "yum list installed" and quickly determine whether it's worth running yum. True, yum would "do nothing", but that takes several seconds. Is there some simple explanation? It works for all the other packages I've installed. David

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CentOS-announce Digest, Vol 152, Issue 1
by centos-announce-request＠centos.org 03 Oct '17

03 Oct '17

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2017:2838 Critical CentOS 6 dnsmasq Security Update (Johnny Hughes) 2. CESA-2017:2836 Critical CentOS 7 dnsmasq Security Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Mon, 2 Oct 2017 23:34:13 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2017:2838 Critical CentOS 6 dnsmasq Security Update Message-ID: <20171002233413.GA8456(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2017:2838 Critical Upstream details at : https://access.redhat.com/errata/RHSA-2017:2838 The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 973d0342cc189e8a76a86645b13dddf1582019cb96446f85b68611d8b69249c3 dnsmasq-2.48-18.el6_9.i686.rpm d97113cf1641a9c46aedd5c4b0d1091ae07ac179e3261334d4bd256186bfbd34 dnsmasq-utils-2.48-18.el6_9.i686.rpm x86_64: 15647fdea6bbf90bce5b5127dc2da0a0d0b338381dbb73fd1193b7f061986e97 dnsmasq-2.48-18.el6_9.x86_64.rpm 5e62a539a1ab5635ef908109dddb971f68cf476d0efe0475928274f16f207df7 dnsmasq-utils-2.48-18.el6_9.x86_64.rpm Source: ddc31b1822ac164af8bdc2f4947f2a760644b1e6c797e6403ef381949ae68109 dnsmasq-2.48-18.el6_9.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ Message: 2 Date: Tue, 3 Oct 2017 00:04:45 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2017:2836 Critical CentOS 7 dnsmasq Security Update Message-ID: <20171003000445.GA16557(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2017:2836 Critical Upstream details at : https://access.redhat.com/errata/RHSA-2017:2836 The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: 4116649e1e436cbc3a5cb3f63fab5b4ddd060a3eec2677ef86319abac5fc39a0 dnsmasq-2.76-2.el7_4.2.x86_64.rpm e6021c48d7461251abf4a6bdbadc493ec435150bc63e57c255196e267fb3e7e1 dnsmasq-utils-2.76-2.el7_4.2.x86_64.rpm Source: 41f44e7d21c87685a8cfe3558f6cb37f1e87d998e7f5e8bc383e6c3471826443 dnsmasq-2.76-2.el7_4.2.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ Subject: Digest Footer _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org https://lists.centos.org/mailman/listinfo/centos-announce ------------------------------ End of CentOS-announce Digest, Vol 152, Issue 1 ***********************************************

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Re: [CentOS] Yum java-devel not listed installed
by Richard 03 Oct '17

03 Oct '17

> Date: Monday, October 02, 2017 16:24:20 -0700 > From: david <david(a)daku.org> > > Folks > > I performed an install of "java-devel". Several packages got > installed. So far so good. > > Yet, when I performed > yum list installed | grep java-devel > and also > yum rpm -qa | grep java-devel > > it did not show up as already installed. > > This behavior appears both on Centos7 and Centos6. This bothers me > because as a time-saving effort, I maintain the last output of "yum > list installed" and quickly determine whether it's worth running > yum. True, yum would "do nothing", but that takes several seconds. > > Is there some simple explanation? It works for all the other > packages I've installed. > > David > What gets installed with a "yum install java-devel" command is: java-1.8.0-openjdk-devel.x86_64 which is why your "yum list installed | grep java-devel" doesn't find it. If you did, instead, "yum list installed | grep java | grep devel" it would work. Your "yum rpm -qa | grep java-devel" isn't a valid yum option. The correct command: rpm -qa | grep java-devel would fail to find it for the same reason your "yum list" command did. Try instead: rpm -qa java\* | grep devel that should turn it up: java-1.8.0-openjdk-devel.x86_64 1:1.8.0.144-0.b01.el7_4 @updates Your /var/log/yum.log shows the names of the packages installed, which can help if there is confusion.

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compile webkit
by Jerry Geis 03 Oct '17

03 Oct '17

I am trying to compile webkitgtk I downloaded the webkit source, extracted CMake Error at Source/cmake/OptionsGTK.cmake:12 (message): GCC 4.9.0 is required to build WebKitGTK+, use a newer GCC version or clang I downloaded 2.14.7 - just like CentOS 7.4 has, how can I be getting a GCC error ? My goal is to get the MediaSource package in webkit working. It seems to not be enabled. Is there a better way ? Thanks, Jerry

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Display IP addresses on the system console *before* the login prompt.
by Arun Khan 02 Oct '17

02 Oct '17

I have a bunch of VBox Linux VMs (CentOS 6/7, Debian7/8/9, Ubuntu (14.0/16.04, Alpine) that get dynamic IPs. To get their respecitive IP addresses I have to login and run 'ip addr' I would like such info to be displayed on the VM console *before* the login prompt. Ideally an ASCII log + info (see below sig line). Thus, I can get the info from the VM console without having to login. I read up on /etc/issue but adding "\4{eth0}" to the existing string does not work. TIA for solutions/pointers -- Arun Khan <console display> _ _ | |__ ___ ___| |_ _ __ __ _ _ __ ___ ___ | '_ \ / _ \/ __| __| '_ \ / _` | '_ ` _ \ / _ \ | | | | (_) \__ \ |_| | | | (_| | | | | | | __/ |_| |_|\___/|___/\__|_| |_|\__,_|_| |_| |_|\___| lo: 127.0.0.1 eth0: 10.1.1.122 kernel: 4.10.0-33-generic x86_64 login: </console display>

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Discuss October 2017