January 2020 - Discuss - lists.centos.org

Adding options to grub
by Mauricio Tavares 14 Jan '20

14 Jan '20

So I want to add a few options to the kernel (say iommu support). I have been told before to avoid using grub2-mkconfig because it would apply the changes to all currently available (to boot from) boot kernels. Instead, I should edit just the latest kernel entry in the grub.cfg file, adding the option to the line that used to start with "linux16" in centos6. This way, if it went boink, all I had to do is reboot, pick another kernel from the grub menu and off I went. And, it seems that every future kernel upgrade would incorporate this change. Looking at a centos7.7 setup, I take the equivalent line in /boot/grub/grub.conf is kernel /boot/vmlinuz-3.10.0-123.4.4.el7.x86_64 console=hvc0 xencons=tty0 root=/dev/xvda ro I am now looking into a centos8 and its grub.cfg (/boot/efi/EFI/centos/grub.cfg in this case) looks rather different. Is what I have described above still the safest way to customize the kernel? Or is there a cleaner way to do the same while still leaving me the option to go back to the grub menu and pick an undisturbed kernel?

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Problems with firewalld-0.7.0
by Orion Poplawski 13 Jan '20

13 Jan '20

After upgrading one of our systems to CentOS 8 CR and firewalld-0.7.0-5.el8.noarch it no longer accepts connections allowed in one of the two active zones. I've reported the issue here: https://bugzilla.redhat.com/show_bug.cgi?id=1790681 but wondered if anyone else was seeing problems with multi-zone firewalld configurations. - Orion -- Orion Poplawski Manager of NWRA Technical Systems 720-772-5637 NWRA, Boulder/CoRA Office FAX: 303-415-9702 3380 Mitchell Lane orion(a)nwra.com Boulder, CO 80301 https://www.nwra.com/

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firefox update
by Steve Clark 13 Jan '20

13 Jan '20

Any idea when firefox-68.4.1 will be available? Thanks, Email Confidentiality Notice: The information contained in this transmission may contain privileged and confidential and/or protected health information (PHI) and may be subject to protection under the law, including the Health Insurance Portability and Accountability Act of 1996, as amended (HIPAA). This transmission is intended for the sole use of the individual or entity to whom it is addressed. If you are not the intended recipient, you are notified that any use, dissemination, distribution, printing or copying of this transmission is strictly prohibited and may subject you to criminal or civil penalties. If you have received this transmission in error, please contact the sender immediately and delete this email and any attachments from any computer. Vaso Corporation and its subsidiary companies are not responsible for data leaks that result from email messages received that contain privileged and confidential and/or protected health information (PHI).

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Problem with disconnecting SSH-sessions
by H 12 Jan '20

12 Jan '20

I am running CentOS 7 on a workstation and CentOS 6 and 7 on a couple of servers I am remotely connecting to using the same username and thus ssh configuration. However, one of the servers running CentOS 6 I keep getting disconnected from whereas I have no such problems with another CentOS 6 server and CentOS 7 server. The latter two are on two different hosted server setups far, far away whereas the problematic one is my own physical hardware in the same building. I have tried to make sure the sshd configuration on all servers are identical but still have this problem. I can rule out a general problem with the router in my office since all connections are via that router, the only difference is that the problematic server is in the same building and the connection loops back via the same router but through an external IP address. /var/log/secure on the workstation offers no clues with no messages regarding any disconnection. If anyone has suggestions what I should check, it would be greatly appreciated!

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Blocking attacks from a range of IP addresses
by H 12 Jan '20

12 Jan '20

I am being attacked by an entire subnet where the first two parts of the IP address remain identical but the last two parts vary sufficiently that it is not caught by fail2ban since the attempts do not meet the cut-off of a certain number of attempts within the given time. Has anyone created a fail2ban filter for this type of attack? As of right now, I have manually banned a range of IP addresses but would like to automate it for the future.

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Re: [CentOS] Block attacks from a range of IP addresses
by Adrian van Bloois 12 Jan '20

12 Jan '20

Hi, I'm using sshguard to acomplish this. You can acutally choose tthe size of the range you want to block, /8 of /16, no problem. It works perfect! It is included in the repo both for C7 and C8. Adrian -- Adri P. van Bloois "Elegance is not a dispensable luxury but a factor that decides between success and failure." Edsger W. Dijkstra

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Unresolved dependencies when upgrade on centOS 8
by Ebed 11 Jan '20

11 Jan '20

Hi, Guys i got unresolved dependencies when trying to upgrade centOS 8, what should i do to fix this? [root@ws1 ebedsat]# dnf upgrade Last metadata expiration check: 0:14:27 ago on Sat 11 Jan 2020 12:16:02 PM WIB. Error: Problem 1: cannot install the best update candidate for package kmod-iwlegacy-0.0-1.el8.elrepo.x86_64 - nothing provides kernel >= 4.18.0-147.el8 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(__pci_register_driver) = 0xe85eaefe needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_unregister_driver) = 0x4883cfc3 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_set_master) = 0xe724f530 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(kmalloc_caches) = 0x8200293d needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_disable_device) = 0x24796ca2 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_enable_device) = 0x982a3dc2 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_release_regions) = 0xbf4a2a75 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_request_regions) = 0x9c656956 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_write_config_byte) = 0x21935607 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_read_config_word) = 0x3dc485cf needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_disable_msi) = 0xc174fcd7 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_enable_msi) = 0xda24a9c7 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_write_config_word) = 0x4b15b75c needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_disable_link_state) = 0x02f2f3f8 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(generic_file_llseek) = 0xc27ffb37 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(debugfs_create_dir) = 0x2f4ce417 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(debugfs_create_file) = 0x501d615e needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_alloc_hw_nm) = 0xba0c6cb1 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_beacon_get_tim) = 0x3e9fc88e needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_free_hw) = 0x1a211787 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_register_hw) = 0x94f9cf8d needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_rx_napi) = 0xe42fba8f needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_stop_queue) = 0x14b3a816 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_stop_queues) = 0x5d5f40f9 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_unregister_hw) = 0x740a5bb2 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_wake_queue) = 0xfa79b997 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_wake_queues) = 0xa900f2df needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(led_classdev_unregister) = 0x9fd8b0e4 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(of_led_classdev_register) = 0xe2dcc6bc needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(wiphy_rfkill_set_hw_state) = 0x1df077cc needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(debugfs_remove) = 0x9ef3e60b needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(debugfs_remove_recursive) = 0x4668b613 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(default_llseek) = 0x384172fd needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pcie_capability_read_word) = 0xa785480e needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(__ieee80211_create_tpt_led_trigger) = 0x0d0ddd5f needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(__ieee80211_get_radio_led_name) = 0xd1d478f1 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_chswitch_done) = 0xced3a36a needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_find_sta) = 0xc579589b needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_rate_control_register) = 0xabcd1b6e needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_rate_control_unregister) = 0x22eec09c needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_restart_hw) = 0x779336b9 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_scan_completed) = 0x70edbf96 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_sta_block_awake) = 0xf9257828 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_start_tx_ba_cb_irqsafe) = 0xbd303a44 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_start_tx_ba_session) = 0xa96bdcd7 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_stop_tx_ba_cb_irqsafe) = 0x963e9d4a needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_stop_tx_ba_session) = 0xf0bb0c05 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(ieee80211_tx_status_irqsafe) = 0xdb983f1b needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(pci_ioremap_bar) = 0x5a71258b needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 - nothing provides kernel(rate_control_send_low) = 0x3f7dc196 needed by kmod-iwlegacy-0.0-2.el8_1.elrepo.x86_64 Problem 2: cannot install the best update candidate for package qt-creator-4.9.2-3.el8.x86_64 - nothing provides libLLVM-8.so()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libLLVM-8.so(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangBasic.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangFormat.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangLex.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangRewrite.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingCore.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingInclusions.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 Problem 3: package qt-creator-doc-4.9.2-4.el8.noarch requires qt-creator = 4.9.2-4.el8, but none of the providers can be installed - cannot install the best update candidate for package qt-creator-doc-4.9.2-3.el8.noarch - nothing provides libLLVM-8.so()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libLLVM-8.so(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangBasic.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangFormat.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangLex.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangRewrite.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingCore.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingInclusions.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 Problem 4: package qt-creator-data-4.9.2-4.el8.noarch requires qt-creator = 4.9.2-4.el8, but none of the providers can be installed - cannot install the best update candidate for package qt-creator-data-4.9.2-3.el8.noarch - nothing provides libLLVM-8.so()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libLLVM-8.so(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangBasic.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangFormat.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangLex.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangRewrite.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingCore.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingInclusions.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 Problem 5: package qt-creator-translations-4.9.2-4.el8.noarch requires qt-creator-data = 4.9.2-4.el8, but none of the providers can be installed - package qt-creator-data-4.9.2-4.el8.noarch requires qt-creator = 4.9.2-4.el8, but none of the providers can be installed - cannot install the best update candidate for package qt-creator-translations-4.9.2-3.el8.noarch - nothing provides libLLVM-8.so()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libLLVM-8.so(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclang.so.8(LLVM_8)(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangBasic.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangFormat.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangLex.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangRewrite.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingCore.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 - nothing provides libclangToolingInclusions.so.8()(64bit) needed by qt-creator-4.9.2-4.el8.x86_64 (try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages) [root@ws1 ebedsat]# uname -mrs Linux 5.4.10-1.el8.elrepo.x86_64 x86_64

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Building and packaging httpd
by Benson Muite 10 Jan '20

10 Jan '20

Hi, Am rebuilding httpd from scratch to enable http2 and minimize extra modules on Cent Os 8. Am having trouble understanding the spec file [0] and systemd initialization [1][2][3] (these are very similar to those extracted from [4]). Why are 3 scripts needed to start the service and why is a pid setting not needed as used in the httpd.service file at [5]? Benson [0] https://src.fedoraproject.org/rpms/httpd/blob/HEAD/f/httpd.spec [1] https://src.fedoraproject.org/rpms/httpd/tree/f31 [2] https://src.fedoraproject.org/rpms/httpd/blob/f31/f/httpd.service [3] https://src.fedoraproject.org/rpms/httpd/blob/f31/f/httpd-init.service [4] http://vault.centos.org/8.0.1905/AppStream/Source/SPackages/httpd-2.4.37-12… [5] https://blacksaildivision.com/how-to-install-apache-httpd-on-centos

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copying files to fill flash drives
by Frank Cox 10 Jan '20

10 Jan '20

Back in the days of DOS I had a program that I obtained from somewhere called FILL. FILL would take the name of a directory and then start writing files from that directory onto a series of floppy disks in such a way that each disk was made as full as possible, but without modifying the files that it was writing. So you might end up with disk 1 having files A B and D on them since D fitted but C was too big so it went onto Disk 2 along with files E and F. Before I re-invent the wheel here, does someone already have a way to do this with Linux so you can write a series of flash drives and fill them with the contents of a specified directory without modifying the files that get written? The reason that I specify without modifying the files is that I could do this easily with tar and split, but then I end up with a tar file and can't just look on disk 1 and copy file A off of it later on. -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com

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Using shared printers in CentOS 8
by Robert Nichols 09 Jan '20

09 Jan '20

How do I let a CentOS 8 client make use of the shared printers advertised by CUPS on the network? In CentOS 6, this was just a matter in a checkbox "Show printers shared by other systems" on the CUPS Admin page. Is this function still available somehow? Manually adding all the shared printers on every client would be painful. -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.

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Centos 6 iwl3945
by Ken Smith 09 Jan '20

09 Jan '20

Hi everyone, I'm having a problem with an iwl3945 wireless adaptor in my laptop running Centos 6. Recently it has been failing to connect to a either 2.4G or 5G Wi-Fi coming from a Draytek Wireless Router. It has usually managed to connect in the past although it has sometimes been a little temperamental. I'm not sure what has changed that has stopped it working. I've tried Kernels 2.6.32-754.24.34 down to 2.6.32-754.15.3 in Centos 6 without it working. This machine also has an old Fedora Core 14 boot with Kernel 2.6.35.14-97 that connects to Wi-Fi just fine. Also the laptop dual boots Win 7 and that also connects to Wi-Fi without issue. How would I go about diagnosing this in the Centos 6 boot? Thanks Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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gcc 8/9 on CentOS 7
by sthustfo 09 Jan '20

09 Jan '20

I am looking to make use of gcc 8/9 on CentOS 7, which is currently with gcc 4.8.5. How do I go about doing this? SCL repository provides the same as part of devtoolset8, but devtoolset8 libstdc++-devel i686 package is missing, without which I can not build 32 bit applications. Are there any repository sources from where I can get this? Otherwise, I am open to building the packages from sources. Please let me know how can one go about this. Any suggestions and pointers appreciated.

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CentOS 7 yum update
by Jerry Geis 08 Jan '20

08 Jan '20

I was in the middle of a yum update on physical box over teh weekend and power died. Ssytem came pack up. But now when I run yum-complete-transaction I get all kinds of errors (these are just the last 4, there are many) systemtap-runtime-4.0-10.el7_7.x86_64 has installed conflicts systemtap-devel < ('0', '4.0', '10.el7_7'): systemtap-devel-4.0-9.el7.x86_64 systemtap-runtime-4.0-10.el7_7.x86_64 has installed conflicts systemtap-client < ('0', '4.0', '10.el7_7'): systemtap-client-4.0-9.el7.x86_64 systemtap-runtime-4.0-10.el7_7.x86_64 is a duplicate with systemtap-runtime-4.0-9.el7.x86_64 util-linux-2.23.2-61.el7_7.1.x86_64 is a duplicate with util-linux-2.23.2-61.el7.x86_64 what to do ? Thanks, Jerry

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can't boot after volume rename
by Paul Amaral 07 Jan '20

07 Jan '20

I renamed my volume with vgrename however I didn't complete the other steps. Mainly update fstab and intiramfs. Once I booted, I was dropped on the Dracut shell. From here I can see the newly rename VG and I can lvm lvscan as well as activate it, lvm vgchange -ay. However I can't figure out what to do next, I'm assuming I need to regenerate the initramfs and then boot to change grub? Could someone point me in the right direction to recovering a FS from Dracut, or other means, once the volume group name was changed. TIA, Paul

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Network Diagnostics
by Chris Olson 07 Jan '20

07 Jan '20

In our smallest office, we have a Dell CentOS 7 system, a Windows system and an HP 8610 printer, all hard-wire Ethernet connected with a Linksys router. The router provides Internet connection. All of the network-connected systems get their IP address from the router at power up. Successful network connection of the printer at power up has recently started taking much longer than usual. The display on the front of the printer indicates that it is initially attempting wireless connection even though this feature is turned off. Ethernet connection is eventually achieved and the printer functions normally on the network but just for a few minutes. After about five minutes, the printer drops its Ethernet connection and appears to be attempting wireless connection once again. During this period, network connectivity is disrupted for the other systems on the network. They are not able to communicate with each other or access the Internet through the router. Turning off the printer restores network connection for the other systems. One of our personnel at another office suggested using Wireshark to check out the network when the printer is having difficulty. Wireshark was apparently not on this system so we installed it using yum install. The tail end of the apparently successful installation process is shown below. Unfortunately, we cannot seem to find Wireshark on the system. Is it possible that Wireshark was not actually installed or do we just not know how to locate and use it? Is this printer networking issue a known problem and is Wireshark the right tool to diagnose the problem? Thanks. Installed: wireshark.x86_64 0:1.10.14-16.el7 Dependency Installed: libsmi.x86_64 0:0.4.8-13.el7 Complete! [user@computer ~]$ [user@computer ~]$ which wireshark /usr/bin/which: no wireshark in (/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/home/user/.local/bin:/home/user/bin) [user@computer ~]$ Recent successful installations: -------------------------------- [user@computer ~]$ [user@computer ~]$ which mplayer /usr/bin/mplayer [user@computer ~]$ which ffmpeg /usr/bin/ffmpeg [user@computer ~]$

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USB drive very slow on CentOS 8
by Michael Eager 04 Jan '20

04 Jan '20

I recently upgraded from CentOS 7 to CentOS 8. I have a Mediasonic HF2-SU3S2 external drive enclosure with 4x3Tb drives configured as a software RAID 5 array (mdadm) with LVM. It's connected to a USB 3.0 port. On CentOS 7, the drive performance is reasonable. On CentOS 8, performance is extremely slow, about USB 1.0 performance. Maybe worse. Connecting an external USB SSD to the CentOS 8 system appears to perform well. I've updated the ASUS Prime-B350-Plus motherboard with the latest BIOS, but it doesn't appear to make any difference. Does anyone have any idea what might be different between CentOS 7 and 8 that would cause this? -- Michael Eager eager(a)eagerm.com 1960 Park Blvd., Palo Alto, CA 94306

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Re: [CentOS] CentOS 7 as a Fibre Channel SAN Target
by Steffan Cline 04 Jan '20

04 Jan '20

In waiting, I tried CentOS 8 which was an even bigger bust. I wiped that clean and tried again with Fedora 31. Same darn error "Could not create Target in configFS". Anyone?? Thank you, Steffan Cline steffan(a)hldns.com 602-793-0014 On 1/2/20, 2:00 AM, "CentOS on behalf of Steffan Cline via CentOS" <centos-bounces(a)centos.org on behalf of centos(a)centos.org> wrote: It took me some time to come back full circle to this. I've worked quite a bit on this with little success so far. It seems like it's been done but on some of the forums and Github, there are no responses yet. This is essentially a cross post from a seemingly dead list. Hopefully someone here will have some suggestions. I've googled this particular issue and not really finding any good results on how to resolve it. I installed targetcli via yum on CentOS 7 and this is the version in the repo: # targetcli targetcli shell version 2.1.fb49 Copyright 2011-2013 by Datera, Inc and others. For help on commands, type 'help'. I downloaded the .zip of the targetcli-fb version and tried it too from the scripts folder and same results. Python: # python --version Python 2.7.5 Libs: Installed Packages python-configshell.noarch 1:1.1.fb25-1.el7 @base python-rtslib.noarch 2.1.fb69-3.el7 @base python-rtslib-doc.noarch 2.1.fb69-3.el7 @base The error comes up when using create. /> /qla2xxx create naa.xxxxxxxxxxxxxxx Could not create Target in configFS Below is the info on my FC /> qla2xxx/ info Fabric module name: qla2xxx ConfigFS path: /sys/kernel/config/target/qla2xxx Allowed WWN types: naa Allowed WWNs list: naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx, naa.xxxxxxxxxxxxxxx Fabric module features: acls Corresponding kernel module: tcm_qla2xxx I have attached the log but don't see anything that really stands out. log.txt I checked per the link http://www.linux-iscsi.org/wiki/Fibre_Channel#Enable_target_mode to ensure that I have initiator mode disabled # cat /sys/module/qla2xxx/parameters/qlini_mode disabled The kernel modules are loaded. # lsmod | grep qla2xxx tcm_qla2xxx 32768 1 target_core_mod 335872 4 tcm_qla2xxx,iscsi_target_mod qla2xxx 634880 1 tcm_qla2xxx scsi_transport_fc 65536 3 bfa,qla2xxx,tcm_qla2xxx configfs is mounted: # cat /proc/mounts | grep configfs configfs /sys/kernel/config configfs rw,relatime 0 0 In the kernel config: CONFIG_CONFIGFS_FS=y Kernel: 4.4.207-1.el7.elrepo.x86_64 Should I be able to create a directory in /sys/kernel/config/target/qla2xxxx? # mkdir naa.10008c7cffc7ef01 mkdir: cannot create directory ‘naa.xxxxxxxxxxxxxxx’: Invalid argument I did notice that when I rebooted, there was no qla2xxx folder in /sys/kernel/config/target/ but after trying to use targetcli, it did make one so I'm not sure what else would cause it to fail. Suggestions? Thank you, Steffan Cline steffan(a)hldns.com 602-793-0014 On 1/11/19, 12:01 AM, "Steffan A. Cline" <steffan(a)hldns.com> wrote: For quite some time I’ve been using FreeNAS to provide services as a NAS over ethernet and SAN over Fibre Channel to CentOS 7 servers each using their own export, not sharing the same one. It’s time for me to replace my hardware and I have a new R720XD that I’d like to use in the same capacity but configure CentOS 7 as a Fibre Channel target rather than use FreeNAS any further. I’m doing virtualization and this will allow me to have failover from one node to the other since they’ll all be sharing the same export rather than me simply backing up to the FreeNAS server the way I am now. Does anyone know of any really good current articles that explain how to set up CentOS 7 as the target in such a configuration and also setting up CLVMd so they can all share an export over Fibre Channel from CentOS 7? Steffan A. Cline steffan(a)hldns.com 602-793-0014 _______________________________________________ CentOS mailing list CentOS(a)centos.org https://lists.centos.org/mailman/listinfo/centos

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systemd-coredump service
by sthustfo 04 Jan '20

04 Jan '20

I am unable to locate systemd-coredump service on CentOS 7.5. It is not listed under "systemctl -a" and also I'm unable to locate the associated unit file (folder /usr/lib/systemd/system/ ). Am I missing any package which installs this service?

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tomcat package and repo for centos8
by Rainer Traut 02 Jan '20

02 Jan '20

Hi all, sadly there is no epel tomcat package so far. As per https://bugzilla.redhat.com/show_bug.cgi?id=1745960 there is no progress for three months. Is there any other third party repository which builds tomcat for centos/rhel 8? Thx Rainer

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Nasty Fail2Ban update for Centos 7
by Allan 02 Jan '20

02 Jan '20

Hi all... Recently a new Fail2Ban was available among some other updates for my Centos 7 system, and I just updated all. It seems that was a very BAD idea. Just noticed that Fail2Ban have generated a 6MB error log because of the update, and FirewallD a 1MB log of errors ! (not sure if any of those were really working after this) ok, I'll just run yum downgrade fail2ban I thought. Naa, no way back - Epel doesn't have a fallback option ! Then gotta dig into Koji, to find the old version, download it, and downgrade to that - and pew, everything is back to normal. The old one seems to be version 0.9.7 and the new one is 0.10.4 I haven't had time to look into Fail2Bans info about these 2 version, but since there is a major version change - is it really possible to just upgrade these ? Sure, I would love to have a working 0.10.4 for my Centos 7 - but it shouldn't destroy my existing system - or it should at least warn me about that - or what to fix. Allan.

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CentOS 7 as a Fibre Channel SAN Target
by Steffan A. Cline 02 Jan '20

02 Jan '20

For quite some time I’ve been using FreeNAS to provide services as a NAS over ethernet and SAN over Fibre Channel to CentOS 7 servers each using their own export, not sharing the same one. It’s time for me to replace my hardware and I have a new R720XD that I’d like to use in the same capacity but configure CentOS 7 as a Fibre Channel target rather than use FreeNAS any further. I’m doing virtualization and this will allow me to have failover from one node to the other since they’ll all be sharing the same export rather than me simply backing up to the FreeNAS server the way I am now. Does anyone know of any really good current articles that explain how to set up CentOS 7 as the target in such a configuration and also setting up CLVMd so they can all share an export over Fibre Channel from CentOS 7? Steffan A. Cline steffan(a)hldns.com 602-793-0014

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KVM Random Reboots AMD EPYC Server
by Helmut Drodofsky 01 Jan '20

01 Jan '20

our new Server with AMD EPYC and super micro board reboots ramdonly. There is no error message before the reboot in /var/log/messages. we are running 2 Server with VMWare workstation without any problem. The new server should run KVM. older servers with AMD (before EPYC) running KVM without any problem. any idea or recommendation? -- Viele Grüße Helmut Drodofsky Internet XS Service GmbH Heßbrühlstraße 15 70565 Stuttgart Geschäftsführung Helmut Drodofsky HRB 21091 Stuttgart USt.ID: DE190582774 Fon: 0711 781941 0 <tel:+497117819410> Fax: 0711 781941 79 Mail: info(a)internet-xs.de www.internet-xs.de

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Nginx and SELinux on CentOS 7
by Nicolas Kovacs 01 Jan '20

01 Jan '20

Hi, I'm currently fiddling with Nginx on CentOS 7. Eventually I want to use it instead of Apache on some servers. Apache works more or less out of the box with SELinux. My websites are all stored under /var/www, and ls -Z shows me that all files created under /var/www are correctly labeled httpd_sys_content_t. On my sandbox server I don't have Apache (httpd) installed, only Nginx (the nginx package from EPEL). I manually created the /var/www directory and put a handful of static websites in there to play around with. Curiously enough, I got a SELinux alert. I took a peek in /var/www, and here's what the SELinux context looks like: unconfined_u:object_r:var_t:s0 Now I'm a bit puzzled. Is the correct httpd_sys_content_t context only applied if the httpd package is installed? How else can I explain this strange behavior? 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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