Discuss June 2018

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93 participants
84 discussions

ARM64 CentOS AltArch release 7.5
by Frederik Lotter 07 Jun '18

07 Jun '18

Hi, I have two questions: (1) In 7.3 CentOS released a rootfs tar for ARM64. I can no longer find this under the 7.5 release. Furthermore, I could also not find anything on the ISO that seems rootfs-like in any near complete state. The closest was the LiveOS/rootfs.img, but it seems this is not a complete fs as yum is missing components, for example. So my question is: Is there any way to still use CentOS releases on new ARM64 development environments (without EFI boot support)? (2) In terms of UEFI firmware support in the ARM64 world (e.g. EDKII vs Uboot), is there any officially supported solution for CentOS, or do you simply support whatever supports the UEFI interface? Regards, Fred

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Latest C6 kernel (2.6.32-696.30.1.el6) Panic on AMD processor on C7 KVM Host
by Johnny Hughes 06 Jun '18

06 Jun '18

https://bugzilla.redhat.com/show_bug.cgi?id=1586278 The above bug addresses a kernel panic if you have a CentOS 7 KVM/QEMU/Libvirt host server running CentOS 6 VMs on an AMD processor machine. If you get this kernel panic: PANIC: early exception 0d rip 10:ffffffff810462b6 error 0 cr2 0 The fix is to change the CentOS 6 VM CPU Type from Opteron_G5 (the default) to Opteron_G3. This was impacting me starting C6 VMs on a C7 host, so I thought I would post the fix to the list.

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Definitive guide to setting up FTPIS on vsftpd
by Frank M. Ramaekers 06 Jun '18

06 Jun '18

I have a new CentOS 7.4 (recently upgraded to 7.5) system that I have been struggling with in configuring vsftpd for FTPS Implicit (port 990). (The latest instructions I've used are at: https://www.unixmen.com/configure-vsftpd-ssltls-centos-7/) Using Filezilla client, I get: Error: GnuTLS error -15: An unexpected TLS packet was received. Error: Could not connect to server Using Core FTP LE: SL/TLS error - 0, SSL error - 1, error:00000001:lib(0):func(0):reason(1) SSL Connection not established Using WinSCP: TLS connect: error in SSLv2/v3 read server hello A TLS connect: error in SSLv2/v3 read server hello A Can't establish TLS connection Disconnected from server lftp from a remote Linux: Fatal error: gnutls_handshake: An unexpected TLS packet was received. Debugging, I get: ... GNUTLS: EXT[0x2aa440f42d0]: sent signature algo (2.3) ECDSA-SHA1 GNUTLS: EXT[0x2aa440f42d0]: Sending extension SIGNATURE ALGORITHMS (22 bytes) GNUTLS: HSK[0x2aa440f42d0]: CLIENT HELLO was queued [268 bytes] GNUTLS: REC[0x2aa440f42d0]: Preparing Packet Handshake(22) with length: 268 and min pad: 0 GNUTLS: ENC[0x2aa440f42d0]: cipher: NULL, MAC: MAC-NULL, Epoch: 0 GNUTLS: REC[0x2aa440f42d0]: Sent Packet[1] Handshake(22) in epoch 0 and length: 273 GNUTLS: ASSERT: gnutls_buffers.c:1154 GNUTLS: ASSERT: gnutls_buffers.c:588 GNUTLS: ASSERT: gnutls_buffers.c:1154 GNUTLS: ASSERT: gnutls_buffers.c:588 GNUTLS: ASSERT: gnutls_buffers.c:1154 GNUTLS: ASSERT: gnutls_buffers.c:588 GNUTLS: ASSERT: gnutls_buffers.c:1154 GNUTLS: ASSERT: gnutls_buffers.c:588 GNUTLS: ASSERT: gnutls_buffers.c:1154 GNUTLS: REC[0x2aa440f42d0]: SSL 48.48 Unknown Packet packet received. Epoch 0, length: 8271 GNUTLS: ASSERT: gnutls_record.c:572 GNUTLS: Received record packet of unknown type 53 GNUTLS: ASSERT: gnutls_record.c:1076 GNUTLS: ASSERT: gnutls_record.c:1158 GNUTLS: ASSERT: gnutls_buffers.c:1409 GNUTLS: ASSERT: gnutls_handshake.c:1446 GNUTLS: ASSERT: gnutls_handshake.c:2757 **** gnutls_handshake: An unexpected TLS packet was received. GNUTLS: REC[0x2aa440f42d0]: Start of epoch cleanup GNUTLS: REC[0x2aa440f42d0]: End of epoch cleanup GNUTLS: REC[0x2aa440f42d0]: Epoch #0 freed GNUTLS: REC[0x2aa440f42d0]: Epoch #1 freed ---- Closing control socket TIA! Frank M. Ramaekers Jr. | Systems Programmer | Information Technology | American Income Life Insurance Company | 254-761-6649 (732-6649) ---------------------------------------------------------------------- This message contains information which is privileged and confidential and is solely for the use of the intended recipient. If you are not the intended recipient, be aware that any review, disclosure, copying, distribution, or use of the contents of this message is strictly prohibited. If you have received this in error, please destroy it immediately and notify us at PrivacyAct(a)torchmarkcorp.com.

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Dual booting Windows 10 and CentOS 7
by Becker, Denis 06 Jun '18

06 Jun '18

Hi - I have an Engineering lab that was set up to dual boot with windows 7 and CentOS 6. This has worked just fine. I would like to get advice on doing the same with Windows 10. Steps I have tried - 1. Free up space for CentOS 7/C7 (50 gb). 2. Reboot to C7 installer. 3. Go to "SYSTEM -> INSTALLATION DESTINATION" Here I see my single Local Disk with 48.83 GiB free. I selected "I will configure partitioning" and hit "Done". This brought up - "New CentOS installation" and at the bottom 48.83 Gib free. I would like to put my C7 in there. I set the "New mount points will use the following partitioning scheme" to "Standard Partition" and hit "+". I get a popup titled "ADD A NEW MOUNT POINT" or where I have to select a "Mount Point" of /, /boot, /home, /var, swap, or biosboot. Do I have to select and define all the above all or is there a subset that will allow me to install C7? What would be reasonable sizes for the partition? After the install - how do I configure grub to Dual boot? Finally, is there a way to automate the process? I think with the W7 and C6 I was able to create on script that would execute and setup a PC automatically. Thanks - I hope this is do-able. __ Denis Becker ITS - Engineering College of Science, Engineering, and Technology Minnesota State University, Mankato Ph: 507-389-5617 Fx: 507-389-5002

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CentOS Pulse Newsletter #1801, June 2018
by Rich Bowen 05 Jun '18

05 Jun '18

We are pleased to announce the latest edition of the CentOS Newsletter. This release is packed with information from the CentOS Community, including events, reports from our SIGs (Special Interest Groups) and information about the release of CentOS 7.5.1804 This is the first edition in many years, and hopefully the first of many to come. We aim to resume a monthly schedule again, going forward. You can read the newsletter at https://wiki.centos.org/Newsletter/1801 More information about the newsletter, and how you can contribute to future editions, is available at http://wiki.centos.org/Newsletter We always welcome comments and suggestions Enjoy the read. The Newsletter Team -- Rich Bowen - rbowen(a)redhat.com @CentOSProject // @rbowen 859 351 9166

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Trying to print...
by m.roth＠5-cent.us 04 Jun '18

04 Jun '18

Well... we've got this poster printer. Been printing for years. There was an, um, incident at work, and long story short, the .ppd that I had had to create was lost. I've pretty much recreated it, and cupstestppd only gives a few warnings... but: I've got it set up in cups on my C 6 server, to go to the JetDirect socket, but I try to print, and it tries to send the file, and the next thing I know, cups says the printer's paused, and in messages I've got a "broken pipe" line. The printer does its internal cleanings and self-tests fine, and I can telnet to the printer. Any thoughts? mark

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installing perl-CPAN without perl-local-lib
by Gary Stainburn 04 Jun '18

04 Jun '18

I'm still working on getting my brand new Centos 7 mail server working and I'm having problems with Perl. Most of the modules are available as RPM's which was straight forward. However, MIME::Parser, Net::SCP and Net::SSH aren't. In order to get these working I installed the perl-CPAN rpm and then installed the modules above. Doing this, installed perl-local-lib.noarch as a dependancy. The problem now is that when I used CPAN to the above modules they installed without errors, but were only available to the root user. I can't uninstall perl-local-lib without uninstalling perl-CPAN and I can't install perl-CPAN without installing perl-local-lib. Any ideas on how I can get to do the simple task of installing these modules system wide?

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CentOS 7.5 gui login root only
by isdtor 03 Jun '18

03 Jun '18

Taking first steps on CentOS 7 1804. Logging into the Gnome/Gnome classic desktop from gdm works only for root. For other users, the screen flashes and the login screen returns. KDE/Plasma login is successful but ends up with a black screen with mouse pointer while all desktop processes appear to be running. The CentOS 7 system is running in a CentOS6 KVM virtual machine, which may be the problem. I have no physical machine for testing right now. These logins work for non-root users when the system is built from the CentOS 7 DVD. The non-working installation stems from a kickstart install which essentially includes a much larger number of packages, some 6k vs. 2.5k from DVD install). Maybe there are conflicts, but I have not been able to isolate anything.

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Questions about yum-cron
by Nicolas Kovacs 03 Jun '18

03 Jun '18

Hi, Up until now I always kept my servers up-to-date manually. Currently I'm experimenting with yum-cron to automate this process. I read through various online tutorials, and now I have a couple questions. 1. As far as I know, when editing /etc/yum/yum-cron.conf, I can only use the following value for update_cmd : update_cmd = default If I understand this correctly, 'update_cmd = security' would have no effect, since contrary to RHEL, CentOS doesn't provide the necessary metadata to operate the distinction between security updates and other updates like mere bugfixes. Please correct me if I'm wrong. 2. It looks like editing /etc/yum/yum-cron.conf affects a *daily* operation of yum-cron, whereas editing /etc/yum/yum-cron- hourly.conf provides hourly operations. The documentation is not very clear about this, and I'm a little confused here. In other words, yum-cron.conf affects /etc/cron.daily/0yum-daily.cron, and yum-cron-hourly.conf affects /etc/cron.hourly/0yum-hourly.cron. I only really need yum-cron to run once a day, which would be sufficient. That being said, I can't figure out at what time it launches. All my users are in France, so ideally the daily yum-cron should be launched somewhere between 04:00 and 05:00 AM, since updating a package like httpd would restart the corresponding processes and kick online users out. I can't seem to figure out a way to define the exact time at which the daily yum-cron is being launched, since this doesn't seem to be controlled by standard crontab. Any suggestions ? Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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Package security scanner for CentOS docker containers
by Traiano Welcome 03 Jun '18

03 Jun '18

Hi List, I’m looking for a command line package security scanner for CentOS docker containers. Is there any utility out there for checking alpine packages in an alpine docker container against the cve database? Tools similar to debsecan would be ideal (https://github.com/allthings/ debsecan), i.e a tool that can be launched from the host machine, will connect to a container on the host, or start up a docker image on the hosts, scan the packages and report CVEs relevant to each package. Thanks in advance, Traiano

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Discuss June 2018