Discuss November 2019

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98 participants
84 discussions

C8 and NetworkManager problem
by Alessandro Baggi 20 Nov '19

20 Nov '19

Hi list, I've installed C8 on my workstation. I configured my network devices (two bridges, two nics) using nmcli. Now that NM is the default I tried it. On C7 I always disabled it. I noticed some problem: 1) During the boot, also if NetworkManager-wait-online.service status is OK, I noticed that opening a terminal and ping some address it needs some time to perform ping and any operation on a network connection. So seems that in the first 30sec/1min there isn't an available network connection. After this time if I run a ping or whatever network is available. 2) Due to the problem 1, It cannot mount samba shares on boot saying "Not suitable address found". After the network is available I can mount samba shares. 3) I noticed that with NetworkManager a bridge must have an address. If I don't specify an address for the bridge, NM will try to assign some address, enable the connection forever (reporting errors in messages and on notification bar). 4) NetworkManager-wait-online slow down boot time and network availability. To solve this problem I installed network-scripts and disabled NetworkManager but I don't understand why NetworkManager need so much time to enable a connection. Can someone point me in the right direction? Thanks in advance.

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qemu-kvm
by Jerry Geis 20 Nov '19

20 Nov '19

I am running this command /usr/libexec/qemu-kvm -no-acpi -smp 4 -m 2048 -drive file=myimg.img,format=raw -vga std -device rtl8139 and expecting a window to open up for the console. It does not. This is on CentOS 8. Do I have something missing/not installed - or something wrong on the command line. Jerry

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CentOS7 sometimes don't detect NIC after reboot
by Miroslav Geisselreiter 20 Nov '19

20 Nov '19

I have brand new PC with this components: CPU Intel® Pentium G5400, LGA1151 motherboard ASUS PRIME B360M-C 16 GB RAM HDD 2x ADATA SSD 256GB XPG GAMMIX S11, PCIe Gen3x4 M.2 2280 (RAID1) NIC Intel X550-T1 Ethernet Converged Network Adapter I installed CentOS 7 and two NICs were detected: eno1 (on motherboard) enp1s0 (Intel X550-T1) When I restart the machine sometimes enp1s0 is missing. It is not detected during boot. It looks like NIC card is not installed / not present. After next reboot everything is fine and I do not see any problems with NIC card. How can I avoid this problem with missing NIC? Can you help me, please? Miroslav Geisselreiter

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Mirroring two screens for all users?
by James Pearson 20 Nov '19

20 Nov '19

We would like to have one workstation (CentOS7 with Gnome3) set up that has mirrored/cloned screens for all users that may login The workstation is using an Nvidia (proprietary) driver for the graphics card. We have set up xorg to use cloned screens, but gdm/Gnome3 appears to ignore these setting and only use what is set in ~/.config/monitors.xml We've set up /var/lib/gdm/.config/monitors.xml with mirrored/cloned settings for the login screen, but when a user logs in, the display switches to spanning both screens Is there any way we can force all user logins to use cloned displays on this one workstation (but not affect any settings they may use on other workstations - all users has NFS mounted home directories) ? Thanks James Pearson

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Virtualizing on CentOS 8
by Jerry Geis 19 Nov '19

19 Nov '19

I am trying to get going with CentOS 8. In the past I would run qemu-system-x86_64 -hda myfile.img get a console and off we go. I dont with to use virt-manager and the gui and all - I just wish to have a similar command line to boot up and run my img. Is there something like that I'm not finding ? I have found virsh - but I dont see how to make it run with an image file from the command line. Perhaps I'm missing something. Thanks, Jerry

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CentOS 8 boot command line
by Jerry Geis 18 Nov '19

18 Nov '19

I am trying to boot a grub entry for CentOS 8 menuentry "Server Install CentOS 8" { linux /boot/vmlinuz noverifyssl ks= https://devgeis.LayeredSolutionsInc.com:443/kickstart/ks_update_to_server8.… biosdevname=0 net.ifnames=0 ksdevice=eth0 ip=192.168.1.13 gateway=192.168.1.1 netmask=255.255.255. 0 nameserver=192.168.1.1 inst.sshd sshd=1 initrd /boot/initrd.img } When booting it says that "ip=192.168.1.3" Sorry unknown value. This works on CentOS 7. How do I specify the IP/SN/GW for CentOS kernel line? Thanks, Jerry

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Post-installation setup script for CentOS 7 servers
by Nicolas Kovacs 18 Nov '19

18 Nov '19

Hi, I just sanded down the remaining edges of my CentOS 7 post-install configuration script and published it on a Github repository, along with some detailed instructions. * https://github.com/kikinovak/centos-setup Feel free to use it (and/or adapt it to your needs). Cheers from the sunny South of France, 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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Re: [CentOS] Firefox 68 jnlp files
by Clark, Patti 18 Nov '19

18 Nov '19

icedtea-web package included with the distros is the plugin that handles javaws for firefox for both RHEL/CentOS 6 and 7 and openjdk. I have yet to find an app that cannot use openjdk instead of oracle java. It may be a little less streamlined, but it's functional. Ignore/cancel any pop ups that talk about updating java. If I missed this answer, I apologize as I receive the digests. Patti Clark Sr. Linux System Administrator Oak Ridge National Laboratory >>>>>>> Date: Thu, 14 Nov 2019 16:21:03 +0000 From: James Pearson <james-p(a)moving-picture.com> To: <centos(a)centos.org> Subject: Re: [CentOS] Firefox 68 jnlp files Message-ID: <1a787894-bbcb-799b-eba9-210c2a8ceaf9(a)moving-picture.com> Content-Type: text/plain; charset="UTF-8"; format=flowed isdtor wrote: > > It seems that firefox 68.x, as distributed with CentOS6 updates, no longer allows opening jnlp files with javaws > > The "Choose Helper Application" window popping up after selecting "Open with/Other" has a predefined list of applications that cannot be customised. > > I'm sure it must be a configuration issue as this works fine with the same browser on other distributions, but what to look for? > > # alternatives --display javaws > javaws - status is auto. > link currently points to /usr/java/latest/jre/bin/javaws > /usr/java/latest/jre/bin/javaws - priority 200000 > Current `best' version is /usr/java/latest/jre/bin/javaws. > # ll -L /etc/alternatives/javaws > -rwxr-xr-x 1 root root 140296 Dec 15 2018 /etc/alternatives/javaws > # Don't know about CentOS6, but with CentOS7, the selection of apps that you can use appear to map to '.desktop' files? If it is the same on CentOS6, then you might be able to set up a suitable .desktop file (e.g. in /usr/share/applications/ or similar) to do what you want ... No idea if this is of any help James Pearson

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40_custom be the default option
by Jerry Geis 18 Nov '19

18 Nov '19

Hi All - I have my 40_custom file setup. What is a good way to make that the default boot option ? I'd rather not count menu option lines and change GRUB_DEFAULT to that - as I am doing this remote. Thanks Jerry

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Re: [CentOS] Cron - log when job ends?
by John Horne 18 Nov '19

18 Nov '19

On Fri, 2019-11-15 at 16:32 -0500, Karl Vogel wrote: > > > On Fri, Nov 15, 2019 at 05:54:07PM +0000, John Horne wrote: > > J> In trying to resolve a problem with a cron job, we can see when the job > J> starts by looking in the /var/log/cron log file. However, I was asked if > J> when the job ends could also be logged. (It seems to be something that > J> crops up every so often over the years.) > > You could use something like this with your scripts. > It works with ksh or bash. > Sorry, I should have been more clear. I'm not looking for a 'per-script' solution. Logging when a job starts is performed by crond, so logging when it ends should also be done by crond. Despite the article I mentioned being from 2011, it seems that Debian 10 still supports the logging of when cron jobs end. Looking into this further it seems that Debian uses anacron, and then applies a patch which provides the '-L' option. I have raised this with the cronie project on github to try and see why this feature has not been implemented. (It may well be that there are good reasons for it having not happened.) A very quick look at the cronie code seems to indicate it may be possible to implement. John. -- John Horne | Senior Operations Analyst | Technology and Information Services University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK ________________________________ [http://www.plymouth.ac.uk/images/email_footer.gif]<http://www.plymouth.ac.uk/worldclass> This email and any files with it are confidential and intended solely for the use of the recipient to whom it is addressed. If you are not the intended recipient then copying, distribution or other use of the information contained is strictly prohibited and you should not rely on it. If you have received this email in error please let the sender know immediately and delete it from your system(s). Internet emails are not necessarily secure. While we take every care, University of Plymouth accepts no responsibility for viruses and it is your responsibility to scan emails and their attachments. University of Plymouth does not accept responsibility for any changes made after it was sent. Nothing in this email or its attachments constitutes an order for goods or services unless accompanied by an official order form.

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Discuss November 2019