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Jitsi Meet on CentOS 7 ?
by Nicolas Kovacs 13 May '20

13 May '20

Hi, Anyone here managed to run Jitsi Meet on a CentOS 7 server ? As far as I can tell, it's one of the nicer open source videoconferencing solutions out there. I gave it a spin on https://suricate.tv and now I'd like to install it on one of my servers. Unfortunately the Jitsi developers only provide documentation for Debian/Ubuntu. Well, there is some sort of guide for CentOS around. As far as I can tell, the purpose of this guide is to encourage CentOS users to switch to Debian/Ubuntu. :o) Anyway, if you have a pointer to some comprehensible docs, I'd be grateful. Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12

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Monitoring network traffic to a host
by Ian Pilcher 13 May '20

13 May '20

Background - I am having an issue with occassional pauses when streaming high-bitrate media across my home network to my smart TV. I *suspect* that the root cause is the (incredibly lame) 100 Mbps Ethernet interface in the TV. In order to confirm that the peak bitrate really does max out the 100 Mbps connection, I'd like to monitor the communication between my NAS and the TV. The two devices are on separate VLANs, with routing performed by a CentOS 7 system, so it should theoretically be relatively simple to use an appropriate utility on the "router" to monitor and, if possible, graph the network traffic going to the TV. Ideally, I could run said utility for the entire time that the media file is playing and then look at its pretty graph to check if/when the bitrate hit 100 Mbps. Being able to watch the pretty graph in real time through a web interface would be nice as well, but is not required. Is any such program included in CentOS 7 or EPEL 7? The closest thing that I've found thus far is iftop (despite its lack of pretty). Unfortunately, it won't allow me to see the peak bitrate over the whole period in which the media is playing. Thanks for any suggestions! -- ======================================================================== In Soviet Russia, Google searches you! ========================================================================

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xvidtune powertools CentOS 8
by Jerry Geis 13 May '20

13 May '20

Hi All - I was looking all over for xvidtune on Centos 8. could not find it. tried yum provides "*/xvidtune" tried yum search xvidtune Google pointed me to: https://centos.pkgs.org/8/centos-powertools-x86_64/xorg-x11-apps-7.7-21.el8… So I installed the apps and of course xvidtune is part of that. However just curious why the provides or search did not point me there ? Should it have? Thanks, Jerry

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CentOS 7 disable the the hot corner
by Jerry Geis 12 May '20

12 May '20

I have loaded the gnome-shell-extension-no-hot-corner-3.28.1-11.el7.noarch and also the gnome-tweaks. When I run gnome-tweaks no where in there do I find the disable hot corner. where is that ? Its annoying when the mouse goes to the upper left and all the windows shrink. I wish to disable it. Thanks. Jerry

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no images from www.imdb.com
by Michael Hennebry 12 May '20

12 May '20

For some reason, I no longer seem to get images from www.imdb.com , i.e. Internet Movie DataBase. The effect is really weird. I get from Firefox, Konqueror and Chromium. I'm running Centos 7. It's been happening for a few months now, so I really cannot tell what changed that mioght have caused it. How do I debug and fix this? Chromium still asks me for passwords a lot. I expect that is a separate issue. -- 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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XFS problem
by Gestió Servidors 11 May '20

11 May '20

Hello, My server is running kernel 3.10.0-1062.12.1 in a CentOS Linux release 7.7.1908. Since some weeks ago, server is restarting after XFS errors. Logs in /var/crash reported this information: [...] [443804.295916] sd 0:0:0:0: [sda] FAILED Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [443804.295919] sd 0:0:0:0: [sda] CDB: Read(10) 28 00 04 53 e8 b0 00 00 28 00 [443804.295922] blk_update_request: I/O error, dev sda, sector 72607920 [443804.295969] sd 0:0:0:0: rejecting I/O to offline device [443804.296245] sd 0:0:0:0: rejecting I/O to offline device [443804.296288] systemd-journal[946]: segfault at 55f73081c820 ip 000055f73081c820 sp 00007fffb3c0f558 error 15 [443804.321330] sd 0:0:1:0: [sdb] tag#35 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT [443804.321335] sd 0:0:1:0: [sdb] tag#35 CDB: Write(16) 8a 00 00 00 00 02 67 e3 f5 f8 00 00 02 00 00 00 [443804.321338] blk_update_request: I/O error, dev sdb, sector 10332927480 [443804.321376] sd 0:0:0:0: rejecting I/O to offline device [443804.321384] XFS (dm-2): metadata I/O error: block 0xf00001 ("xfs_trans_read_buf_map") error 5 numblks 1 [443804.321390] XFS (dm-2): xfs_do_force_shutdown(0x1) called from line 239 of file fs/xfs/libxfs/xfs_defer.c. Return address = 0xffffffffc073a90b [443804.321421] sd 0:0:0:0: rejecting I/O to offline device [443804.321431] XFS (dm-2): metadata I/O error: block 0x1e04cee ("xlog_iodone") error 5 numblks 64 [443804.321433] XFS (dm-2): xfs_do_force_shutdown(0x2) called from line 1238 of file fs/xfs/xfs_log.c. Return address = 0xffffffffc077b210 [443804.321442] XFS (dm-2): Log I/O Error Detected. Shutting down filesystem [443804.321443] XFS (dm-2): Please umount the filesystem and rectify the problem(s) [443804.351688] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [...] It seems problem are hard disk or XFS module, but physical RAID controller reports all hard disks are OK, so I suppose problem is XFS module. Also, I have read in this forum (https://bugs.centos.org/view.php?id=16960) something similar. Could someone say me is lastest kernel version for CentOS-7 (3.10.0-1127) solves this problem? Thanks.

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CentOS 8 installer bug
by isdtor 11 May '20

11 May '20

CentOS 8.1.1911 has a bug in the installer. It is not possible to use more than one NFS repo via kickstart repo directive as the installer tries to mount all of them on /run/install/.nfs. You get this DBG payload: /run/install/.nfs already has something mounted on it message for all but the first one. The problem was reported for Fedora 29/30. https://bugzilla.redhat.com/show_bug.cgi?id=1669711 Do we know if this is fixed in RHEL 8.2?

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DND Issues in Gnome (GTK3 regression)
by Leon Fauster 11 May '20

11 May '20

Does someone uses EL8 as a workstation (GUI) here? This bug is super annoying https://bugzilla.redhat.com/show_bug.cgi?id=1808900 and it seems not to get addressed in the current branch. How could a developer work with a forced delay in the UI (since a year now). Solution maybe in 8.3 ETA end of the year? Seems that all RH employees uses OSX as workstation (my impression of the summit) :-) This bug is located in gtk3 and should also hit non-GNOME users. Am I the only one here? Is CentOS Stream the workplace to address this bug? -- Leon

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FAX
by Mark LaPierre 11 May '20

11 May '20

Hey All, Has anyone out there figured out how to send a FAX from a computer, sans FAX machine? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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Zoom....
by mark 10 May '20

10 May '20

Hi, folks, Updated CentOS 7 the other day. Updated zoom last night. Ancient (15 yr old) USB camera, Logitech QuickCam Express. If I run LD_PRELOAD=/usr/lib64/libv4l/v4l2convert.so cheese, I get video. Zoom, with or without the LD_PRELOAD - no video. I've tried stracing zoom, and created a file /etc/ld.so.preload, with the contents of /usr/lib64/libv4l/v4l2convert.so, and in strace, I see it loading it, but still no video. Anyone got any clues? Being a free end user, all zoom offers is the knowledge base.... mark

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