Discuss June 2020

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87 discussions

virt-manager guest and sound
by Jerry Geis 10 Jun '20

10 Jun '20

I am running C7 host and pulse audio. I have a Win 10 guest with ICH9 audio. It works - but I hear artifacts. Anything to do to help audio be flawless under guest VM ? Currently I was just on youtube and playing a song. nothing special. Plenty of resources on the host. The guest has 8G ram and 8 CPU. Thanks Jerry

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In CentOS 8 new install, old /home, .desktop opens in gedit
by Lamar Owen 10 Jun '20

10 Jun '20

Ok, hoping someone has seen this or at least knows where to look. I have been waiting around a bit to upgrade my system to CentOS 8, and actually wanted to wait on 8.2, but had an opportunity this week to actually do the work, so took the opportunity. Here was my process: 1.) Installed CentOS 8.1.1911 on a spare mSATA SSD in my spare M6700 laptop. Installed the RPMfusion nVidia drivers, the PowerTools repo, set up the extensions for Places, Applications, etc, and got it prepped to accept my /home disk. 2.) After complete backups, physically moved my /home disk from the CentOS 7 M6700 to the CentOS 8 M6700. /home is on a LUKS LVM lv; got all the mount options and encryption options setup to start on boot. All of that now works, even though it took a bit of wrangling (if the filesystem mount is set to start up at boot without the nofail option BUT the encryption option is left at the User Default setting, it will not work!). Did a complete SELinux relabel (touch /.autorelabel and reboot). Moved the default GNOME config dirs over to the old /home; don't want a lot of cruft left over from the C7 install (which has been upgraded over the years from C6, Fedora 14, and earlier, and it was time to get rid of some cruft, I'm sure). After booting back up with the old /home in place, verified the GNOME extensions settings I had set up after the new install. All looks good, and working like it's supposed to so far. 3.) Moved over the Win10 and Win7 virtual machines, all of that works fine. 4.) Started installing my everyday programs, beginning with Harrison Mixbus. The program put its menu entry in place; all good. However, when I go to double click on the .desktop shortcut, it opens in gedit. Hmm, this ain't quite right. This worked fine on C7 in GNOME Standard mode. So, at this point, the Mixbus_6.0.702.desktop file is on my desktop, it's in ~/Desktop with executable permissions and is owned by the correct user, but right-clicking on it does not bring up the choice to 'Allow Launching.' The GNOME Extension 'Desktop Icons' is installed and is active. I've tried a whole lot of suggestions, but wanted to see if anyone here had seen this before and has solved the problem to allow launching of the .desktop file as it is supposed to do. Just knowing that 'it works for you' actually is helpful, especially if we can figure out what is different from my install to yours (SELinux context, permissions, etc). Just knowing where to look would be helpful; and I'm going to diff my old GNOME config from my /home backup to the fresh as-installed config.... gnome-shell-extension-desktop-icons-3.32.1-10.el8.noarch is installed.

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CentOS-announce Digest, Vol 184, Issue 3
by centos-announce-request＠centos.org 10 Jun '20

10 Jun '20

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-2020:2414 Important CentOS 7 unbound Security Update (Johnny Hughes) 2. CESA-2020:2414 Important CentOS 7 unbound Security Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 9 Jun 2020 15:58:30 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2020:2414 Important CentOS 7 unbound Security Update Message-ID: <20200609155830.GA14423(a)bstore1.rdu2.centos.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2020:2414 Important Upstream details at : https://access.redhat.com/errata/RHSA-2020:2414 The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) Source: 23ffc6fc5c3340e4e55cb79b8da3f80361bd4adcac8215c0cf561dd83738560a unbound-1.6.6-4.el7_8.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ Message: 2 Date: Tue, 9 Jun 2020 17:13:01 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2020:2414 Important CentOS 7 unbound Security Update Message-ID: <20200609171301.GA16717(a)bstore1.rdu2.centos.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2020:2414 Important Upstream details at : https://access.redhat.com/errata/RHSA-2020:2414 The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: d7c7de939c7a3dbec81adf688ae2557ca2fc3f18498eb9c09b8896d3b73dd071 unbound-1.6.6-4.el7_8.x86_64.rpm d253cd8566f10e05e7bbaba91b8985b224760bd9bc95d7be1236a61a2a300846 unbound-devel-1.6.6-4.el7_8.i686.rpm e08699d98dc4bdc6e3b0420111f4c7a54fd21233dfe55c8b0a966c770023e54f unbound-devel-1.6.6-4.el7_8.x86_64.rpm 75c67d364ea5de70c161e35d62955896b31edafb1314e1338b5ff4d265ec23e4 unbound-libs-1.6.6-4.el7_8.i686.rpm 84862fc5e25c9431d1c50a088469c311a471ecf1f475906b2758ccb65ffe2f20 unbound-libs-1.6.6-4.el7_8.x86_64.rpm da25fe4519d413260c142ca775e23133ce865ed79ceeb4e60448c1fea9b1ecd0 unbound-python-1.6.6-4.el7_8.x86_64.rpm Source: 23ffc6fc5c3340e4e55cb79b8da3f80361bd4adcac8215c0cf561dd83738560a unbound-1.6.6-4.el7_8.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 184, Issue 3 ***********************************************

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C8 install problems
by ejm 10 Jun '20

10 Jun '20

Hi all, I am trying to install C8 from a DVD I made onto a 1Tb disc partitioned into 2 ext4 partitions. The first partition contains C7 which I installed via a DVD. Trying to install C8 yields an error indicating the file /dev/root is missing. I've checked the SHA256 sum for the ISO for CentOS 8.1 1911 and it checks out fine. I've burned a couple of different DVDs and get the same error about /dev/root missing from both. I burned both DVDs using the PC app PowerISO. Is that potentially a problem ? Looking at the log file of the C8 install I see before the message about /dev/root, that the file /etc/iscsi/initiatorname.iscsi is missing --and /sbin/modprobe -bv sg failed w/ exit code 1 I am doing the install with the target 1Tb disc attached, via a USB cable from a SATA docking station, to a ASUS PC running Windows 7. I boot up via the DVD just fine on the PC, but I've not been able to get past the errors from iSCSI and /dev/root. I do see a message at the very beginning of the install that the hardware family 12h is "not supported upstream". I'm not sure if that message is important, or a red herring. Is it possible that the Orico SATA docking station (model 6619) has been dropped in C8 ? Any tips or suggestions would be greatly appreciated. Thanks, --Ed

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yum/dnf diff
by Kenneth Porter 10 Jun '20

10 Jun '20

I'm used to using "git diff" and "svn diff" to view changes in my development system. Is there a similar thing that works with changes between a repository package and the installed RPM? Ie. something that shows the changes in /etc hinted at by "rpm -V". I'm already using etckeeper+git but that would combine changes from updates with my own modifications. The only thing I've found so far is a rather manual procedure: <https://serverfault.com/questions/378439/getting-diffs-for-file-changes-det…>

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Disabling fips mode in Centos 7.6
by Akshar Kanak 10 Jun '20

10 Jun '20

Dear team if i need to disable FIPS on Centos 7.6 , then setting fips=0 in kernel parameter should be more then sufficient . Why should we remove the dracut-fips package and regenerate the initramfs? Thanks and regards Akshar

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Switching between keyboards in CentOS 7 using the MATE desktop
by H 09 Jun '20

09 Jun '20

I switch between three keyboards, two western ones and Chinese Pinyin entry. I have fcitx installed to switch between Pinyin and standard entry and use the keyboard switching in MATE to switch between keyboards. While I originally believed there was a bug in fcitx since switching between entry fields in firefox, chromium and thunderbird using the non-default keyboard always switched me back to the default keyboard, this even when hitting ENTER in a Chromium entryfield, I now believe the problem might lie in MATE or CentOS. There is no problem remembering whether a particular program is configured by me to use Pinyin input or not so that seems to work fine. Can anyone else confirm this issue? Might it be a configuration issue on my end? By the way, I use CTRL-SHIFT+RIGHT-SHIFT to switch between keyboards.

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firewalld / iptables / nftables
by Leon Fauster 09 Jun '20

09 Jun '20

Despite that the migration of our applications comes with a significant workload. It seems that also every aspect of common services had changed with EL8. In EL8 firewalld uses nftables as backend. I wonder why iptables does not list any rules while also configured to use nftables as backend. # iptables -V iptables v1.8.2 (nf_tables) # firewall-cmd --list-all |egrep -o '22|ssh' ssh # nft list ruleset | egrep -o '22|ssh' ssh # iptables -L -n | egrep -o '22|ssh' <EMPTY> Any hints? -- Leon

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Trying to get bride network on CentOS 7 working with virt-manager
by Jerry Geis 09 Jun '20

09 Jun '20

I have these interfaces listed. eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.1.8 netmask 255.255.252.0 broadcast 192.168.3.255 inet6 fe80::e2d5:5eff:fe63:abe5 prefixlen 64 scopeid 0x20<link> ether e0:d5:5e:63:ab:e5 txqueuelen 1000 (Ethernet) RX packets 42411243 bytes 4701898681 (4.3 GiB) RX errors 0 dropped 156 overruns 0 frame 0 TX packets 78372982 bytes 34946337897 (32.5 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 16 memory 0x92f00000-92f20000 virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:fc:34:af txqueuelen 1000 (Ethernet) RX packets 132792 bytes 337411780 (321.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 138593 bytes 742263806 (707.8 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.100.1 netmask 255.255.255.0 broadcast 192.168.100.255 ether 52:54:00:9c:39:02 txqueuelen 1000 (Ethernet) RX packets 206217 bytes 132308800 (126.1 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 105448 bytes 197008661 (187.8 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0-nic: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether 52:54:00:fc:34:af txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 When I bring up virt-manager, got settings for my VM, and for "Network Source" I select "Specify Shared Device Name" and I have tried the virbr0 and clicked apply and boot the machine. I get networking but not bridged networking - not a 192.168.1.X address. Is there something I missed ? Thanks, Jerry

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Postfix restrictions
by Nicolas Kovacs 09 Jun '20

09 Jun '20

Hi, I'm currently fine-tuning my mail server (Postfix and Dovecot on CentOS 7). SPF, DKIM and DMARC work fine, now I'd like to limit the spam tsunami. Besides the official Postfix documentation, I've read a few articles about Postfix spam restrictions, namely these : https://www.linuxbabe.com/mail-server/block-email-spam-postfix https://wiki.centos.org/HowTos/postfix_restrictions After some experimenting, here's what I currently have on my test server: --8<----- /etc/postfix/main.cf ----------------------------- ... smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, check_helo_access hash:/etc/postfix/helo_access reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, reject_unknown_helo_hostname smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated, check_sender_access hash:/etc/postfix/sender_access, reject_unknown_sender_domain, reject_unknown_reverse_client_hostname, reject_unknown_client_hostname smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_client_access hash:/etc/postfix/rbl_override, reject_rhsbl_helo dbl.spamhaus.org, reject_rhsbl_reverse_client dbl.spamhaus.org, reject_rhsbl_sender dbl.spamhaus.org, reject_rbl_client zen.spamhaus.org --8<-------------------------------------------------------- Before committing this configuration to my main server, I thought I'd share this configuration on the list. Maybe the Postfix gurus among you have the odd comment to make. My aim is simply to eliminate as much spam as possible (that is, before adding SpamAssassin) while keeping false positives to a minimum. Any suggestions ? 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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