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Author: Albert

How to disable or enable the IPv6 protocol in AlmaLinux?

Why errors are received when changing IPv6 kernel parameters? # sysctl -p error: "net.ipv6.conf.default.accept_redirects" is an unknown key error: "net.ipv6.conf.default.accept_ra" is an unknown key error: "net.ipv6.conf.all.disable_ipv6" is an unknown key error: "net.ipv6.conf.default.disable_ipv6" is an unknown key Internet Protocol Version 6 (IPv6) is enabled by default in AlmaLinux and CentOS. However, some users might find it …

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How to configure CUPS to use ephemeral ports instead of reserved ports?

When many users are printing at once, CUPS is very slow. The following error is seen repeatedly in the file /var/log/cups/error_log. E [09/Jul/2013:10:06:00 +0200] [Job 865106] Unable to reserve port: Resource temporarily unavailable The firewall blocks connections initiated from low-numbered TCP ports (port numbers less than 1024). This blocks CUPS outgoing LPD (Line Printer Deamon) …

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“Insufficient compute resources: vGPU resource is not available”

  The error "Insufficient compute resources: vGPU resource is not accessible" appears when you launch an OpenStack instance with an NVIDIA GRID Virtual GPU attached, as shown below. nova-conductor.log:2022-09-07 20:59:05.993 21 WARNING nova.scheduler.utils [req-a1538494-34e9-4e26-b004-834f5ce49542 98cb30a967c144feba7d98c99fa637db 596a4c7b716046cb8fe6dd0b6b9a9ebc - default default] Failed to compute_task_build_instances: Exceeded maximum number of retries. Exceeded max scheduling attempts 3 for instance f4099be3-698f-4c50-bcb1-8717f1aa1b7b. …

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32-bit application not finding files on XFS filesystem

Inodes received 32-bit numbers or less under older XFS behavior, which always allocated inodes within the first 1TiB of the filesystem. With more recent XFS behavior, inode64 is the default mount option, allowing inodes to be put anywhere inside the filesystem. However, files with inode numbers greater than 32 bits may be difficult for 32-bit …

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How to install rasdaemon and monitor hardware errors

To set up the hardware error reporting rasdaemon. Install the rasdaemon package first. Launch the rasdaemon service after enabling data collection in Rasdaemon. Configure the rasdaemon service to restart automatically when the computer boots up. The motherboard DIMM labels can be imported into the EDAC drivers once the service has been launched for simpler fault …

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Is systemd-resolved enabled in AlmaLinux 8?

At the time of writing, the systemd-resolved service is only available as a Technology Preview on AlmaLinux 8 and AlmaLinux 9. Technology Preview features might not be complete, are not covered by SeiMaxim's production Service Level Agreements (SLAs), and SeiMaxim does not advise utilizing them in production. Customers can test functionality and offer feedback while …

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File systems became read-only on virtual guests on VMware

Filesystem entered ready-only mode, and the following SCSI I/O fault incidents were recorded in syslog messages. kernel: sd 0:0:0:0: timing out command, waited 1080s kernel: sd 0:0:0:0: Unhandled error code kernel: sd 0:0:0:0: SCSI error: return code = 0x06000008 kernel: Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT,SUGGEST_OK If the failover occurs before the timeout, everything will proceed as usual. …

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