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Re: [CentOS] Can't move to Centos 8
by Mauricio Tavares 15 May '20

15 May '20

On Thu, May 14, 2020 at 1:46 AM Kenneth Porter <shiva(a)sewingwitch.com> wrote: > > --On Wednesday, May 13, 2020 8:22 PM -0400 Mauricio Tavares > <raubvogel(a)gmail.com> wrote: > > > 1) Have you considered moving the storage business to another host so > > not to have a single point of failure? > > 2) Would a $60 Raspberry Pi 4GB be a good replacement? 2 USB3 ports > > and 1 GB ether port. My Synology storage appliance thingie is much > > dumber than that and has not missed a beat in years. > > I'm using CentOS 7 and 8 for internal servers but use OpenWrt on a consumer > router to do the fancy traffic balancing with the "cake" traffic control > module, something the old kernel in CentOS 7 lacks. > Funny you mentioned the OpenWrt: I have been using one as access point and realized I not only forgot how to but cannot find info (I remember seeing it years ago) on how to run the 2.4 and 5GHz as separate networks. Well, I can't even get the internal dhcp to work, having to forward all that to my bind/dhcp vm guest. Shame on me, as if I get that working I can then think on putting a vpn between wireless and internal networks which is something I really should be doing. > I'm running an email server with Dovecot IMAP, Spamassassin, and ClamAV and > that's a bit of a load so I suspect a Pi would be underpowered for that. > I really think it depends on the load, and only you have access to the performance info to answer that. There are people running all that in docker containers (I could swear I read about an "official" or "officially blessed" postfix container in the postfix mailing list).

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How to Load Custom CentOS 7 Image
by Xinhuan Zheng 14 May '20

14 May '20

Dear All, I want to create a CentOS 7 VMWARE VM. I need to install various Runtime libraries, e.g., Tomcat, into the VM. Once all looks good, then I want to make a Custom Image of the entire VM. Later I want to load this Custom Image to a physical HW, so that I don’t need to go through all kinds Runtime installation. Does anyone know how to handle creating a Custom Image and Load to physical HW process? How does boot loader work when VM vs Physical HW has different devices? Thank you, - Xinhuan

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Default ACL inheritance question
by James Pearson 14 May '20

14 May '20

A bit of a minor off-topic issue, but on the off-chance that someone understands how ACLs work ... I've been trying to see if using default ACLs would help with the following issue: I have a third party application that is running as a non-root user ('user-a') and creating log files with mode 0600 (read/write only to the owner) in a log directory I have another application that runs as another non-root user ('user-b') that needs to read the log files created by 'user-a' I can't change the mode of the log files generated by 'user-a', but I thought I could add a default ACL to the log file's parent directory that gave read access to 'user-b' - i.e. something like: % sudo setfacl -d -m u:user-b:r logdir % getfacl logdir # file: logdir # owner: user-a # group: user-a user::rwx group::r-x other::r-x default:user::rwx default:user:user-b:r-- default:group::rwx default:mask::rwx default:other::r-x Now when new log files are created in logdir, the default ACL is inherited, but 'user-b' still can't read the files - i.e. % getfacl logdir/logfile # file: logdir/logfile # owner: user-a # group: user-a user::rw- user:user-b:r-- #effective:--- group::rwx #effective:--- mask::--- other::--- i.e. the effective access for 'user-b' is '---' - which is no access to read for 'user-b' I'm not sure where 'effective' comes from? If I now explicitly add a read ACL for user-b to logdir/logfile: % sudo setfacl -m u:user-b:r logdir/logfile % getfacl logdir/logfile # file: logdir/logfile # owner: user-a # group: user-a user::rw- user:user-b:r-- group::rwx mask::rwx other::--- and 'user-b' can read logdir/logfile I guess I'm missing something on how default ACLs are meant to work - can anyone explain what is happening here or point me in the right direction ? I've actually 'solved' the issue with a suitable sudoers rule that allows 'user-b' to run the required command as 'user-a', but I would like to find out why this default ACL method doesn't work Thanks James Pearson

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CentOS 8 updates
by Bill Maidment 13 May '20

13 May '20

Hi Is it my imagination/impatience, but I don't seem to have received any updates to CentOS 8 recently. I'm thinking particularly of firefox which was updated in CentOS 7 for a critical security update. Is there a backlog of CentOS 8 updates behind the 8.2 release? I noticed on a few occasions that my local mirroring had picked up and later deleted a lot of "tmp" files for CentOS 8, is that an indication that something is on the way? I understand that everyone is struggling with Covid19 restrictions, so just tell me to get back into my isolation if I'm just a bit too impatient. -- Cheers Bill

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How to get CentOS 8 on AWS
by Thomas Stephen Lee 13 May '20

13 May '20

Hi, I am user of CentOS 8. When can we expect an image on AWS? I am just learning AWS and would like to use CentOS 8 for that. thanks --- Lee

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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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