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Google Chrome
by Michael B Allen 25 Nov '13

25 Nov '13

I have been using CentOS on my laptop for a few days now and it works great! Great work-around for the Fedora GNOME 3 debacle. But I'm starting to miss Google Chrome pretty seriously. Firefox is just not what it once was. It's slow. Spell check is weak. Sometimes it straight up fails to display pages after going "back". There are numerous details like this that just make FF almost intolerable. And based on current browser usage statistics I don't think I'm the only one who sees the difference which means the problem is only going to get worse. Unfortunately Chrome is not available for CentOS 6.4: Error: Package: google-chrome-stable-31.0.1650.57-1.x86_64 (google-chrome) Requires: libstdc++.so.6(GLIBCXX_3.4.15)(64bit) This page [http://www.muktware.com/2013/02/google-says-red-hat-enterprise-linux-6-is-o…] claims: "Chrome, the browser in question here, is based on the open source project Chromium. Chromium developers seems to prefer the new C++11 for the obvious security reasons and ease of maintenance but it also means adopting a new toolchain and upgrading to GCC 4.6. This makes it hard to support those operating systems that ship with older C++ standard libraries. RHEL 6, among many others, is one such operating system." What is the safest path out of this problem? I am not particularly excited about running a package from a small third party. Particularly a browser. Is this situation really that bad? Mike

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Re: [CentOS] X11 connection rejected because of wrong authentication
by James B. Byrne 25 Nov '13

25 Nov '13

On Sun, November 24, 2013 20:08, Timothy Murphy wrote: > I'd like to run SELinux on my CentOS server in enforcing mode, > but I get the above message when I run sealert. > I assume this is because I am accessing the server from my laptop? > > In any case, I googled for the message, > and this threw up dozens of similar queries over many years. > Most of the ones I read offered methods of avoiding the problem > rather than solving it. > > Am I right in thinking the message arises from my remote connection? Yes. It arises from your ssh connection. You are probably using the -Y or -X option with xauth. > And if so, is there a simple solution? Perhaps. The error you have is caused by one of two things: 1. incorrect SELinux settings on the ~/.Xauthority file or your home directory. Run restorcon -vR ~ to fix those. 2. incorrect ownership or permissions on ~/.Xauthority. The second condition can also be triggered by logging in via ssh as one user and su -l to another on the remote host. In my case I find that the second circumstance is the most frequent cause of the exact error you report. HTH -- *** E-Mail is NOT a SECURE channel *** 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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Re: [CentOS] Any experience with lanner appliances?
by John Doe 25 Nov '13

25 Nov '13

From: Steve Clark <sclark(a)netwolves.com> > We have about 1000 FW-7535s (replaced by FW-7541) deployed using > CentOS 6.x. I finally chose to go with the microserver... I have a hard time finding a simple price for the lanner appliance (without having to fill some huge forms to get a quotation...) And last time, when I did find one price, it was more than $800 which feels too much for some "above average soho router like hardware". Thank you both for the info,JD

1 0

MultiTech MT5634ZBA usb modems
by Gregory P. Ennis 24 Nov '13

24 Nov '13

Everyone, I have a centos 5.10 machine set up to be a fax server using hylafax+ with three multitech MT5634ZBA modems. I am still in the testing phase of using this system for production, and during my tests I have detected a problem I have not been able to solve except for unplugging the modem from the usb port and plugging it back into the usb port. In the middle of a fax production of around 1,000 faxes the ttyACM0 device becomes disabled and disappears. I have only had this happen twice so I have not collected sufficient data to figure out what is happening. When I remotely reboot the os, the system comes up and ignores the modem that has become faulty, and of course ttyACM0 is assigned to a different modem. Has anyone had problems with the MT5634SBA modems, and if so what modems would you recommend by way of replacements. Is there a way to turn off a usb port so that I could power down the modem remotely, and then bring it back up. I think if I could do this, remotely, I may be able to save the use of these modems. Otherwise, I am going to be required to have someone unplug the modem and plug it back in to reset it in order to make it work. hylafax+ seems to be working fine, it just reports that the modem has become inaccessible. Any ideas? Thanks much, Greg Ennis

1 0

Postfix relay on Comcast
by Lists 24 Nov '13

24 Nov '13

How to get postfix working on CentOS 6 and Comcast. Recently, they've changed their policies regards email relay and require authentication even to send email. (they no longer use IP address ranges, presumably in an attempt to curb outgoing SPAM) I didn't see an updated howto anywhere on the Interwebs, thought I'd point out what I had to do. The part that had me stumped for longer than I care to admit was having to install cyrus-sasl-plain rpm - EL5 apparently had that installed as part of the cyrus-sasl package. 1) yum install postfix cyrus-sasl-plain; # note that cyrus-sasl-plain is NOT installed by default but is needed by this config. 2) Create file /etc/postfix/passwords. Replace "USERNAME" with your user name, and "password" with your password. Note: your username is typically your email address without the domain name. #---------------------------- smtp.comcast.net:587 USERNAME:password smtp.comcast.net USERNAME@comcast.net:password #---------------------------- 3) makemap passwords; 4) Edit /etc/postfix/main.cf #---------------------------- relayhost = [smtp.comcast.net]:587 smtpd_sasl_auth_enable = yes smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/passwords # note that with no security options on, we're using sasl-plain installed above. smtp_sasl_security_options = # You might need this, you may not. #sender_canonical_maps = regexp:/etc/postfix/sender_rewrite #---------------------------- 5) Create file /etc/postfix/sender_rewrite. Note that not all Comcast customers need this, I didn't when I authenticated as above. Obviously, replace "USERNAME" with your user name. #---------------------------- /^([^@]*)@.*$/ USERNAME(a)comcast.net #---------------------------- 6) service postfix stop; sleep 5; service postfix start

3 2

RAM Requirements
by Mark LaPierre 24 Nov '13

24 Nov '13

Hey Y'all, Does anyone know where I can look, please post a URL, where I can find out what the minimum system requirements are for CentOS 6.4? I've searched the CentOS.org web site for this but I've come up empty. I've got an old machine that had RH9 on it. The HD died so I had to replace that. Now I'm thinking that I want to install CentOS 6.4 on it but the minimal install disk says that I don't have enough RAM for it to do the install. -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

8 12

Re: [CentOS] EPEL problem
by Mark LaPierre 24 Nov '13

24 Nov '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/23/2013 07:42 PM, Reindl Harald wrote: > Am 24.11.2013 01:29, schrieb Mark LaPierre: >> On 11/23/2013 06:57 PM, Phil Dobbin wrote: >>> I'm trying to install the EPEL repo on a fully up to date >>> CentOS 6.4. I'm using wget to download from my usual source but >>> after I install it via `sudo rpm -ivh epel-xxxxx` it's not >>> actually there in `/etc/yum.repos.d`. >>> >>> Trying to install it again, Yum just tells me it's already >>> installed. >>> >>> I've no idea where it is installed if it is (which I don't >>> think it is) so I'm stumped. >>> >>> Any help appreciated. >>> >>> Cheers, >>> >>> Phil... >>> >> >> locate epel.repo > > does not help before the mlocate cronjob refreshed the database or > someone with knowledge does it by hand - no magic there > > "rpm -q --filesbypkg <packagename>" is the one and only correct > command and if there is no file in /etc/yum.repos.d it is *not* > installed > > [root@openvas:~]$ rpm -q --filesbypkg epel-release epel-release > /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 epel-release > /etc/rpm/macros.ghc-srpm epel-release > /etc/yum.repos.d/epel-testing.repo epel-release > /etc/yum.repos.d/epel.repo epel-release > /usr/share/doc/epel-release-6 epel-release > /usr/share/doc/epel-release-6/GPL > > Good point. - -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ **** -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSkVWIAAoJEOKvcl2cb48H/S8H/R9J2FhVhjhZr61PNYhOOAaL 9k88Oqizg8URXVtB9zs9RCpfwqNRpKRfeEEcLfsriiu6JV9NFhqp+QLZMANcKIDv OBJ6zdpmIwZoTa8f3o1aSuJ3Zq6u3AioM5j0IonUu1OJLrLMI7d0lOUsVAypT6fH /jPpCA4Y23LVo+wC1YzSv3ObVMSD/BQXCAYU+mItwwQG16xxyRL7K3B7xbNMhgq8 7qLk0VXTbFWuq6NlpVaynN6r5itsibtZvz0lC6sr84MmR4tTUsohOumLlShBH/01 u0A8xGrbEZpjg0riqJm8oqFIa0amKtGxsk9CAEGQet9+Ed2qG0AdVEdjm4Ub/kk= =ATPa -----END PGP SIGNATURE-----

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Crash and automatical reboot when using the NVIDIA card
by David McGiven 23 Nov '13

23 Nov '13

Hello there, I'm running a Supermicro server with the latest CentOS 6.4 versions (kernel : 2.6.32-358.23.2.el6.x86_64) and the latest nvidia driver (331.20). A few minutes after using the GPU for doing some HPC calculations, the server crashes and reboots itself. This is happening every time. I know it will be rebooted but I don't know when. Sometimes it's 20 minutes after starting using it. Sometimes it's 2 hours. If I unplug the GPU card and put some stress on the server, it works ok. So I suspect there's a bug in the kernel/nvidia driver. I can't find any messages on /var/log/messages. What should I do ? Should I file a bug on the centos bugtracking system ? Is there anyway I can gather more information ? The server is in a remote location so I have a hard time accessing the console. Thanks.

6 6

nfs4, idmapd, users with same name, different uid?
by Les Mikesell 22 Nov '13

22 Nov '13

Is idmapd supposed to work where users have different uid numbers on the nfsv4 server and client? It seems to show the right names for ownership on the client side, but if I automount a home directory, that user doesn't have permission to enter it, and if I change permission to allow access and create a new file, it shows on the server as owned by the uid number for the user on the client (and wrong on the server). Everything works like it would on nfs v3 where the uid numbers are the same on the client and server, but what's the point of the rpcidmapd daemon if it doesn't actually map the ids? -- Les Mikesell lesmikesell(a)gmail.com

5 12

SSSD with 389DS
by Mitja Mihelič 22 Nov '13

22 Nov '13

Hi! We are setting up an environment with two 389DS configured as master-consumer. The DIT holds about 70.000 user records. A couple of other machines running SSSD will be using the 389DS setup for all user info lookups that would normally go to passwd/shadow. There are also other applications that will be querying the 389DS for various other user data. All servers are running CentOS6. In total I would estimate that SSSD would be handling about 400 queries per second. How should I configure SSSD to get the most out of it? Cache refreshes, (negative) timeouts, expirations, enumerations? Regards, Mitja -- -- Mitja Mihelič ARNES, Tehnološki park 18, p.p. 7, SI-1001 Ljubljana, Slovenia tel: +386 1 479 8877, fax: +386 1 479 88 78

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