Discuss November 2020

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71 participants
57 discussions

MATE 1.20 test build for CentOS 7 available
by Greg Bailey 14 Oct '21

14 Oct '21

Hi everyone, There's been discussions in the past about updating MATE RPMs in EPEL-7: https://bugzilla.redhat.com/show_bug.cgi?id=1436260 https://lists.centos.org/pipermail/centos/2019-August/173154.html (and lots of others...) As a proof-of-concept, I've written some scripts that clone specific commits from the Fedora master branches, and then runs a tool to re-apply RPM scriptlets that are required by EL7 but removed from the Fedora .spec files. The scripts are available at: https://github.com/gebailey/mate-rpms/tree/master/1.20/el7 There's also instructions there if you want to try upgrading to MATE 1.20 w/o rebuilding them yourself. If these packages work for others, perhaps we can revisit the idea of updating the epel7 branches of the Fedora git repos and submitting an official update. There's nothing here (yet) about building MATE 1.22 (which might require a newer gcc for EL7), or building anything on CentOS 8, but thought the CentOS 7 users might find this helpful. -Greg

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CentOS advisories for 8 release
by Olivier Bonhomme 16 Dec '20

16 Dec '20

Hello dear CentOS community, I'm writing on this mailing list because I'm discovering CentOS 8 after several years of practice on CentOS 7. One of my main concern about a distribution is Bug Fixes and Security Fixes. For CentOS 7, all fixes where identified on CentOS-Announces lists with CESA, CEBA and CEEA which is a good thing in order to identify how a distribution can be broken, vulnerable. However, I didn't find any announcement for CentOS 8. I tried to investigate about any changes about announcement policies but I didn't find anything reliable. So I'm asking here what is exactly the status about announcements for CentOS 8 ? Is it a thing who totally disappeared replaced by Red Hat advisories or is it something different ? Or maybe it is just not planned yet ? Explanations would be very welcomed. Thanks for your answer Regards, Olivier Bonhomme

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Learning to build applications
by H 10 Dec '20

10 Dec '20

I have managed to get through the qtmake stage of compiling the current github version of pgmodeler on CentOS 7 but make && make install fails with: make && make install cd libutils/ && ( test -e Makefile || /bin/qmake-qt5 -o Makefile /home/h/pgmodeler/libutils/libutils.pro CONFIG+=release PREFIX= BINDIR= PRIVATEBINDIR= PRIVATELIBDIR=/lib ) && make -f Makefile make[1]: Entering directory /home/h/pgmodeler/libutils' g++ -c -pipe -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -O2 -std=gnu++1y -Wall -W -D_REENTRANT -fPIC -DBUILDNUM=\"20201030\" -DBINDIR=\"\" -DPLUGINSDIR=\"/lib/pgmodeler/plugins\" -DPRIVATEBINDIR=\"\" -DCONFDIR=\"/share/pgmodeler/conf\" -DDOCDIR=\"/share/pgmodeler\" -DLANGDIR=\"/share/pgmodeler/lang\" -DSAMPLESDIR=\"/share/pgmodeler/samples\" -DSCHEMASDIR=\"/share/pgmodeler/schemas\" -DQT_NO_DEBUG -DQT_PRINTSUPPORT_LIB -DQT_SVG_LIB -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -I. -isystem /usr/include/libxml2 -isystem /usr/include/qt5 -isystem /usr/include/qt5/QtPrintSupport -isystem /usr/include/qt5/QtSvg -isystem /usr/include/qt5/QtWidgets -isystem /usr/include/qt5/QtGui -isystem /usr/include/qt5/QtNetwork -isystem /usr/include/qt5/QtCore -Imoc -isystem /usr/include/libdrm -I/usr/lib64/qt5/mkspecs/linux-g++ -o obj/exception.o src/exception.cpp In file included from src/exception.cpp:18:0: src/exception.h:41:11: error: ‘underlying_type_t’ in namespace ‘std’ does not name a type constexpr std::underlying_type_t<Enum> enum_cast (Enum obj_type) noexcept ^ src/exception.cpp: In constructor ‘Exception::Exception(ErrorCode, const QString&, const QString&, int, Exception*, const QString&)’: src/exception.cpp:295:86: error: ‘enum_cast’ was not declared in this scope configureException(QApplication::translate("Exception",messages[enum_cast(error_code)][ErrorMessage].toStdString().c_str(),"", -1), ^ src/exception.cpp: In constructor ‘Exception::Exception(ErrorCode, const QString&, const QString&, int, std::vector<Exception>&, const QString&)’: src/exception.cpp:314:86: error: ‘enum_cast’ was not declared in this scope configureException(QApplication::translate("Exception",messages[enum_cast(error_code)][ErrorMessage].toStdString().c_str(),"",-1), ^ src/exception.cpp: In static member function ‘static QString Exception::getErrorMessage(ErrorCode)’: src/exception.cpp:371:25: error: ‘enum_cast’ was not declared in this scope if(enum_cast(error_code) < ErrorCount) ^ src/exception.cpp: In static member function ‘static QString Exception::getErrorCode(ErrorCode)’: src/exception.cpp:382:25: error: ‘enum_cast’ was not declared in this scope if(enum_cast(error_code) < ErrorCount) ^ src/exception.cpp: In static member function ‘static QString Exception::getErrorMessage(ErrorCode)’: src/exception.cpp:378:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ src/exception.cpp: In static member function ‘static QString Exception::getErrorCode(ErrorCode)’: src/exception.cpp:386:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ make[1]: *** [obj/exception.o] Error 1 make[1]: Leaving directory /home/hakan/pgmodeler/libutils' make: *** [sub-libutils-make_first-ordered] Error 2 I am a beginner when it comes to compiling applications and would appreciate suggestion how to fix the above. Thank you.

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Retrieving files from dd backup
by H 06 Dec '20

06 Dec '20

Running CentOS 7 I have a previously combined backup of a disk with three partitions using dd. I now need to restore one single file from this backup and after perusing the internet, specifically https://unix.stackexchange.com/questions/31669/is-it-possible-to-mount-a-gz…, I have done the following: - installed squashfs-tools - installed kpartx - made a squash image of the dd backup and mounted it - used kpartx to create devices for the three partitions under /dev/mapper/loopNpP - I can now mount the first partition, which is the EFI partition, and access it - the second partition, the boot partition, fails to mount since it has the same UUID as the disk I am using in the computer, and of which it is an earlier dd backup. Since I am not interested in the boot partition - at least not right now - I moved on. - I am, however, interested in the third partition which is LUKS encrypted. Running 'cryptsetup luksOpen /dev/sda3 my_encrypted_volume' I can decrypt it with the password - trying to mount the decrypted version with 'mount /dev/mapper/my_encrypted_volume /media/my_device' results in a failure message 'mount: unknown filesystem type 'LVM2_member' - another website, https://askubuntu.com/questions/766048/mount-unknown-filesystem-type-lvm2-m…, suggests I could run vgdisplay to get the UUID and then rename it using vgrename But, vgdisplay shows only one vg and I am afraid to rename the VG UUID shown by vgdisplay since it might refer to the VG currently in use... Does anyone have any insight or suggestions into the above and how to proceed while being absolutely certain I will not be messing up the running part of the system? Thanks!

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Logitech C922 webcam
by H 06 Dec '20

06 Dec '20

Just installed the above USB webcam but it is not recognized by dmesg | grep usb, nor does Zoom recognize it. I was under the understanding it should not require a driver, or? I am running CentOS 7. Thanks.

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Table *** is marked as crashed and should be repaired
by Александр Кириллов 03 Dec '20

03 Dec '20

Hi, I've started migrating my sites to mariadb which is supposed to be a drop-in replacement of mysql. Both run on the same C6 box. DB folders were moved to a new location after both DB servers were stopped and properly upgraded. There were no reboots or power failures. Nevertheless I see these error messages in the logs: # cat /var/opt/rh/rh-mariadb102/log/mariadb/mariadb.log ... 2020-11-29 16:38:23 139882501732320 [Note] /opt/rh/rh-mariadb102/root/usr/libexec/mysqld: ready for connections. Version: '10.2.22-MariaDB' socket: '/var/opt/rh/rh-mariadb102/lib/mysql/mysql.sock' port: 3307 MariaDB Server 2020-11-29 16:38:23 139882394105600 [Warning] Access denied for user 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO) 2020-11-29 16:39:37 139882394105600 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_wc_customer_lookup' is marked as crashed and should be repaired 2020-11-29 16:39:37 139882394105600 [ERROR] mysqld: Table 'wp_wc_customer_lookup' is marked as crashed and should be repaired 2020-11-29 16:39:37 139882394105600 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_wc_customer_lookup' is marked as crashed and should be repaired 2020-11-29 16:39:37 139882394105600 [ERROR] mysqld: Table 'wp_wc_customer_lookup' is marked as crashed and should be repaired 2020-11-29 16:39:37 139882394105600 [Warning] Checking table: './wordpress@002dstorefront/wp_wc_customer_lookup' ... 2020-11-29 17:16:17 140059421116384 [Note] /opt/rh/rh-mariadb102/root/usr/libexec/mysqld: ready for connections. Version: '10.2.22-MariaDB' socket: '/var/opt/rh/rh-mariadb102/lib/mysql/mysql.sock' port: 3307 MariaDB Server 2020-11-29 17:16:18 140059356550912 [Warning] Access denied for user 'UNKNOWN_MYSQL_USER'@'localhost' (using password: NO) 2020-11-29 17:20:01 140059356550912 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_options' is marked as crashed and should be repaired 2020-11-29 17:20:01 140059356550912 [ERROR] mysqld: Table 'wp_options' is marked as crashed and should be repaired 2020-11-29 17:20:01 140059356550912 [Warning] Checking table: './wordpress@002dstorefront/wp_options' 2020-11-29 17:20:02 140059356550912 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_posts' is marked as crashed and should be repaired 2020-11-29 17:20:02 140059356550912 [ERROR] mysqld: Table 'wp_posts' is marked as crashed and should be repaired 2020-11-29 17:20:02 140059356550912 [Warning] Checking table: './wordpress@002dstorefront/wp_posts' 2020-11-29 17:20:02 140059356550912 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_actionscheduler_claims' is marked as crashed and should be repaired 2020-11-29 17:20:02 140059356550912 [ERROR] mysqld: Table 'wp_actionscheduler_claims' is marked as crashed and should be repaired 2020-11-29 17:20:02 140059356550912 [Warning] Checking table: './wordpress@002dstorefront/wp_actionscheduler_claims' 2020-11-29 17:22:28 140059356550912 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_usermeta' is marked as crashed and should be repaired 2020-11-29 17:22:28 140059356550912 [ERROR] mysqld: Table 'wp_usermeta' is marked as crashed and should be repaired 2020-11-29 17:22:28 140059356550912 [Warning] Checking table: './wordpress@002dstorefront/wp_usermeta' 2020-11-29 17:22:31 140059356550912 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_woocommerce_sessions' is marked as crashed and should be repaired 2020-11-29 17:22:31 140059356550912 [ERROR] mysqld: Table 'wp_woocommerce_sessions' is marked as crashed and should be repaired 2020-11-29 17:22:31 140059356247808 [ERROR] mysqld: Table './wordpress@002dstorefront/wp_woocommerce_sessions' is marked as crashed and should be repaired 2020-11-29 17:22:31 140059356247808 [ERROR] mysqld: Table 'wp_woocommerce_sessions' is marked as crashed and should be repaired 2020-11-29 17:22:31 140059356550912 [Warning] Checking table: './wordpress@002dstorefront/wp_woocommerce_sessions' ... Note that after the crashed table was repaired mariadb reported multiple crashed tables in the same DB after restart. Any pointers? Never had such problems with mysqld. Is mariadb reliable and stable at all? # cat /etc/centos-release CentOS release 6.10 (Final) # rpm -qa '*maria*' rh-mariadb102-mariadb-server-utils-10.2.22-1.el6.x86_64 rh-mariadb102-mariadb-common-10.2.22-1.el6.x86_64 rh-mariadb102-mariadb-10.2.22-1.el6.x86_64 rh-mariadb102-mariadb-server-10.2.22-1.el6.x86_64 rh-mariadb102-mariadb-config-10.2.22-1.el6.x86_64 rh-mariadb102-mariadb-errmsg-10.2.22-1.el6.x86_64 rh-mariadb102-runtime-3.0-5.el6.x86_64 TIA, AK

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Reminder: CentOS 6 EOL on 30 November 2020
by Johnny Hughes 02 Dec '20

02 Dec '20

All, This is a friendly reminder. CentOS 6.10 will EOL at the end of November 2020. During the first week in December 2020, the 6.10 directory will move to vault.centos.org Packages will still be available at: http://vault.centos.org/centos/6.10/ However, once moved, there will be no more updates pushed to vault.centos.org. Therefore, security issues will no longer be fixed, etc. You should take the rest of the month to either move to a newer versoin of CentOS Linux ... or to procure Extended el6 support from Red Hat (EUS RHEL 6). Thanks, Johnny Hughes

3 2

Physical position of swap partition on the disk
by Nicolas Kovacs 01 Dec '20

01 Dec '20

Hi, Here's a question to the fine-tuning gurus. Yesterday while installing a fresh CentOS server, I wondered how big of a deal the physical position of the swap partition on the disk is. Here's an example of a simple MBR partitioning scheme on a legacy BIOS machine with a 60 GB SSD: * /dev/sda1: 500 MB /boot ext2 * /dev/sda2: 4 GB swap * /dev/sda3: 55 GB / ext4 In the old (Slackware) days, I created the partitions manually using fdisk. Now when I do something similar in Anaconda, I have to reason in terms of mount points. So in a similar order I create the /boot partition, the swap partition and the root partition. What happens here is that Anaconda will always invert the root and swap partitions and put the swap partition at the end of the disk. So my setup looks like this: * /dev/sda1: 500 MB /boot ext2 * /dev/sda2: 55 GB / ext4 * /dev/sda3: 4 GB swap I'd be curious to know what's the reason behind this, and if this kind of configuration detail is really significant. Cheers, 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 Mob. : 06 51 80 12 12

5 5

Anaconda : MBR vs. GPT
by Nicolas Kovacs 28 Nov '20

28 Nov '20

Hi, I've always been a bit puzzled by the fact that Anaconda provides no option to manually create a partition table and specify if it's MBR or GPT. >From what I can tell - at least under CentOS 7.x - Anaconda will default to MBR, even if I specify a BIOS Boot partition. Maybe it switches automatically to GPT if the disk size requires it ( > 2 TB IIRC) though I don't have any corresponding hardware here to test it. Is this documented somewhere? Or is there a nifty little trick to tell Anaconda to prefer GPT partition tables? Cheers, 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 Mob. : 06 51 80 12 12

2 2

Emulate Ghost4Linux with standard Linux commands?
by Nicolas Kovacs 28 Nov '20

28 Nov '20

Hi, I'm currently trying to solve a tricky problem, and I don't even know if it's possible. Let me describe the situation with a practical example. In my office I have a sandbox PC for testing various setups that can't be tested in a virtual machine. I'm using this machine to test various setups with the Linux distributions I'm using, namely CentOS 7, CentOS 8 and OpenSUSE Leap 15. I have a series of Ghost images of these systems on a local FTP server, and I'm using G4L (Ghost4Linux) to transfer these images to and from the server. * https://sourceforge.net/projects/g4l/ On a side note, I take care of zeroing unused disk space in order to get relatively compact disk images like this: # dd if=/dev/zero of=/0bits bs=20M ; rm -f /0bits Besides my local sandbox machine, I also have a sandbox server in a datacenter, which I'm using for testing Internet-facing stuff. I'd like to be able to do something similar with this public machine, e. g. backup the whole disk content completely agnostic in terms of partitions and file systems and send it to a public FTP server. Unfortunately I can't boot G4L on this server, since I don't have physical access to the machine. The datacenter is about 700 km from where I can live. What I can do: fire up a rescue console via an administration web interface and boot a live Linux system, either Ubuntu 16.04 or 18.04. Now here's the question. From within my live system, how could I compress my system into a compact image and then send it to a distant FTP server? And once this is done, how could I get my image back from the server? Cheers from the sunny South of France, 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 Mob. : 06 51 80 12 12

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Discuss November 2020