Discuss April 2016

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150 participants
130 discussions

xorg-x11-drv-amdgpu 1.1.0
by Andreas Benzler 21 Apr '16

21 Apr '16

I have recently installed the xorg-11-drv-amdgpu 1.1.0 on my laptop. sources can found at. http://centos.cms4all.org/centos/7/drivers/ http://centos.cms4all.org/centos/7/drivers/SRPM/xorg-x11-drv-amdgpu-1.1.0-1… Don’t forget that i use a newer mesa 11.1.2 and kernel 4.4.8 its. The kernel 3.10 was not build for that „new“ graphic cards“. Sincerely Andy Benzler

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CentOS 7.2 laptop wireless Intel Corporation Centrino Wireless-N 2230 (rev c4)
by Philip V 21 Apr '16

21 Apr '16

With CentOS 7.2 a laptop wireless card is recognized in dmesg, but nonfunctional. Toggling the hardware wifi switch causes the Bluetooth icon to appear and disappear. The network configuration window shows the Wireless tab greyed out. Rebooting with the bluetooth enabled does not help. It appears the appropriate driver is iwlwifi, which is what works in Fedora and appears to be available and installed in CentOS. lspci gives 08:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4) 1. How do I get this working? I am happy to work with command line tools. 2. Are there other packages I need? I installed wireless-tools, and tried to fiddle with iwconfig and NetworkManager to no avail. iwconfig does seem to interact with the wifi device. 3. Is there documentation I should be following to understand/troubleshoot networking support? https://wiki.centos.org/HowTos/Laptops/Wireless does not document the iwlwifi driver.

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how do I use only black ink?
by Michael Hennebry 20 Apr '16

20 Apr '16

I have an HP Photosmart C3180 All-in-one. As I haven't had any need for color lately, when I last replaced ink, I only replaced the black cartridge. It didn't work, even when printing grayscale-only images, even when telling print-set-up grayscale-only. Is there a way to tell my printer to use only the black ink cartridge. My test image is a handmade postscript file that only use setgray to set the color. -- 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] VPN suggestions centos 6, 7
by david 19 Apr '16

19 Apr '16

> > >Folks > >I would like to have my windows 7 laptop communicate with my home >server via a VPN, in such a way that it appears to be "inside" my >home network. It should not only let me appear to be at home for >any external query, but also let me access my computers inside my home. > >I already have this working using M$'s PPTP using my home Centos 6 >gateway/router as the PoPToP server. However, I am concerned about >the privacy/security of such a connection. > >I have seen discussions of OpenVPN, OpenSwan, LibreVPN, StrongSwan >(and probably others I haven't noted). I'd be interested in hearing >from anyone who wishes to comment about which to use, with the >following requirements: > >1) As noted, it should be secure (anti NSA?) >2) Works on Centos 6 and Centos 7 and Windows 7 (and for the >future, Windows 10) >3) Can be set up on the server with command line interfaces only (no GUI) > >And, should not be a nightmare to set up. > >Any thoughts? > >David ---------------------------- FOLLOWUP & REPORT I had lots of suggestions, and the most persuasive was to try OpenVPN. I already had a CA working, so issuing certificates was easy. The HOW-TO guides were less helpful than I could hope, but comparing several of them, applying common sense, and trying things out, I arrived at a dead-end. Here's essentially what happened: - None of the HOW-TOs were very clear about the need to add some attributes to a certificate, keyUsage and extendedKeyUsage. They had different values for server and client. OpenSSL documentation was a big vague on how to add them, but I think I did - the print out of the entity certificates showed the values. The attempt to connect failed. The client log is below. I think it's complaining that the CA certificate doesn't have the ke Usage extension, which makes no sense to me. Such an extension should be in the end-entity certificate, not the CA's, unless I'm wrong. I checked the server and really think that the certificates are in the right place. To review the situation: Client: A windows 7 laptop, and it definitely moves around. Server: Centos 6 running in my home. Protocol is TCP Client log, some details replace with XXXXX --------------------------- Mon Apr 18 05:34:47 2016 OpenVPN 2.3.10 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Mar 10 2016 Mon Apr 18 05:34:47 2016 Windows version 6.1 (Windows 7) Mon Apr 18 05:34:47 2016 library versions: OpenSSL 1.0.1s 1 Mar 2016, LZO 2.09 Enter Management Password: Mon Apr 18 05:34:47 2016 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25340 Mon Apr 18 05:34:47 2016 Need hold release from management interface, waiting... Mon Apr 18 05:34:48 2016 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25340 Mon Apr 18 05:34:48 2016 MANAGEMENT: CMD 'state on' Mon Apr 18 05:34:48 2016 MANAGEMENT: CMD 'log all on' Mon Apr 18 05:34:48 2016 MANAGEMENT: CMD 'hold off' Mon Apr 18 05:34:48 2016 MANAGEMENT: CMD 'hold release' Mon Apr 18 05:34:48 2016 Socket Buffers: R=[8192->8192] S=[8192->8192] Mon Apr 18 05:34:48 2016 MANAGEMENT: >STATE:1460982888,RESOLVE,,, Mon Apr 18 05:34:48 2016 Attempting to establish TCP connection with [AF_INET]X.X.X.X:1194 [nonblock] Mon Apr 18 05:34:48 2016 MANAGEMENT: >STATE:1460982888,TCP_CONNECT,,, Mon Apr 18 05:34:49 2016 TCP connection established with [AF_INET]X.X.X.X:1194 Mon Apr 18 05:34:49 2016 TCPv4_CLIENT link local: [undef] Mon Apr 18 05:34:49 2016 TCPv4_CLIENT link remote: [AF_INET]X.X.X.X:1194 Mon Apr 18 05:34:49 2016 MANAGEMENT: >STATE:1460982889,WAIT,,, Mon Apr 18 05:34:49 2016 MANAGEMENT: >STATE:1460982889,AUTH,,, Mon Apr 18 05:34:49 2016 TLS: Initial packet from [AF_INET]X.X.X.X:1194, sid=63eed44a 8be061de Mon Apr 18 05:34:50 2016 VERIFY OK: depth=1, C=US, ST=California, L=San Francisco, OU=Certificate Authority, O=XXXX, CN=X.X.X Mon Apr 18 05:34:50 2016 Certificate does not have key usage extension Mon Apr 18 05:34:50 2016 VERIFY KU ERROR Mon Apr 18 05:34:50 2016 TLS_ERROR: BIO read tls_read_plaintext error: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed Mon Apr 18 05:34:50 2016 TLS Error: TLS object -> incoming plaintext read error Mon Apr 18 05:34:50 2016 TLS Error: TLS handshake failed

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Re: [CentOS] 答复: How to configure VLAN in CentOS7
by Gordon Messmer 19 Apr '16

19 Apr '16

On 04/18/2016 08:01 PM, liyulei wrote: > And I used the command "tcpdump -i eno1.5 " to > capture the datagrams through the vlan interface, there were only repeated > outputs: > ARP who has 192.68.81.254 Tell 192.168.81.3 > > Could you tell me the reason for that? My guess would be that the switch isn't configured to give you access to VLAN 5 with tagged packets. In that case, there's no need for you to configure eno1.5 Specifically what are you trying to accomplish by configuring a tagged VLAN interface?

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Google Chrome and CentOS 6?
by Sorin Srbu 19 Apr '16

19 Apr '16

Hi all, Just recently I started getting the dreaded message about my CentOS 6.7 x64-installation wasn't going to be supported anymore by Google Chrome. "This computer will soon stop receiving Google Chrome updates because this Linux system will no longer be supported." Doing some google searches I found this; http://superuser.com/questions/1011832/this-computer-will-soon-stop-receivi… Which in itself wasn't too uplifting... Following the suggestion about installing Chromium instead worked, but it seems to be stuck at an ancient version of the browser. Recompiling the available Chromium source is of course an option, but not for me. Not unless there are step-by-step guides doing it. There was a rather long and somewhat heated discussion regarding Chrome on CentOS a while ago. Was there any real conclusion about Google Chrome on CentOS and how to get around this problem? Are the views on this matter still infected? I'm not looking forward to go back to the sluggish Firefox. 8-/ -- BW, Sorin ----------------------------------------------------------- # Sorin Srbu, Sysadmin # Uppsala University # Dept of Medicinal Chemistry # Div of Org Pharm Chem # Box 574 # SE-75123 Uppsala # Sweden# # Phone: +46 (0)18-4714482 # Visit: BMC, Husargatan 3, D5:512b # Web: http://www.orgfarm.uu.se ----------------------------------------------------------- # () ASCII ribbon campaign - Against html E-mail # /\ # # This message was not sent from an iProduct! # # Please consider the environment before printing this email. # Join the campaign at http://thinkBeforePrinting.org # # MotD follows: # "You guys got something against spam?" -de Vriess, in Alien^4

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Machine-readble cloud-image list
by Barak Korren 19 Apr '16

19 Apr '16

Hi there, I would like to write a script to download the CentOS generic cloud images with the intention of making them eventually available to oVirt users via the oVirt public Glance repository. For that purpose I need to: 1. list the CentOS generic cloud images 2. list mirrors from where I could potentially download those images I could try to parse the HTML here [1], but I'd rather just get the lists from somewhere in some machine readble format if possible. So is this information or parts of it available in some machine-readable format somewhere? [1]: http://cloud.centos.org/centos/7/images/ Thanks, Barak -- Barak Korren bkorren(a)redhat.com RHEV-CI Team

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CentOS-announce Digest, Vol 134, Issue 10
by centos-announce-request＠centos.org 19 Apr '16

19 Apr '16

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. [Infra] : DevCloud maintenance window notification (Fabian Arrotin) ---------------------------------------------------------------------- Message: 1 Date: Mon, 18 Apr 2016 16:28:42 +0200 From: Fabian Arrotin <arrfab(a)centos.org> To: "The CentOS developers mailing list." <centos-devel(a)centos.org>, centos-announce(a)centos.org Subject: [CentOS-announce] [Infra] : DevCloud maintenance window notification Message-ID: <5714EF1A.10105(a)centos.org> Content-Type: text/plain; charset="utf-8" Due to recent changes in the racks hosting the DevCloud nodes (https://wiki.centos.org/DevCloud), we'll have to reorganize the physical placement of those nodes. That means that we'll have to shut down/power off the whole DevCloud infra, migrate the nodes in another rack, and slowly restart all the services running on those nodes. Important notice : if you are a CentOS contributor/developer having some Virtual Machines in DevCloud, ensure that everything is correctly setup on your side, as we'll only (from an hypervisor PoV) issue acpi shutdown to the VMs Other impacted services: - http://planet.centos.org - http://seven.centos.org - http://armv7.dev.centos.org (plague-server, so no armhfp build during that maintenance window) Migration is scheduled for """"Tuesday April 26th, 2:30 pm UTC time"""". You can convert to local time with $(date -d '2016-04-26 14:30 UTC') We'll slowly restart services when possible and we expect everything to be back online before 8:00 pm UTC. Thanks for your comprehending and patience. on behalf of the Infra team, -- Fabian Arrotin The CentOS Project | http://www.centos.org gpg key: 56BEC54E | twitter: @arrfab

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Is there a comprehensive documentation about CentOS7?
by Shawn Fang 19 Apr '16

19 Apr '16

Hello everyone, I visited https://www.centos.org/docs/ and found no documentation about CentOS7. Is the documentation about CentOS5 still suitable? Thanks.

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How to configure VLAN in CentOS7
by liyulei 18 Apr '16

18 Apr '16

Hi, I encountered a problem when creating a VLAN interface according to the Red_Hat_Enterprise_Linux-7-Networking_Guide. I configuered the parent interface ifcfg-eno1 as follows: DEVICE=eno1 TYPE=Ethernet BOOTPROTO=none ONBOOT=yes And I created a new file named ifcfg-eno1.5, the content is: DEVICE=eno1.5 BOOTPROTO=none ONBOOT=yes IPADDR=192.168.81.3 PREFIX=24 NETWORK=192.168.81.0 VLAN=yes Then I restarted the network: systemctl restart network After that I found that I couldn't connect to the Internet, even couldn't ping the gateway. I thought it might be I didn't set the GATEWAY in ifcfg-eno1.5, so I added the GATEWAY=192.168.81.254(My local area network gateway), it didn't work. Could anybody teach me how to create a VLAN interface in CentOS7, or tell me what' s wrong with my configuration, more detailed more better. Thanks Li yulei

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Discuss April 2016