Linux
Discussion List
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Postfix Mail Server "/var/spool/postfix/maildrop" Mail Queue Fills /var on Linux InstanceA Linux instance is running the Postfix mail server. The /var/ filesystem on the server has filled to 100% utilization, and further checking subdirectories in /var shows… -
OCI: UFW Was Enabled on Ubuntu and SSH Connections Started to Fail With Connection Refused ErrorAn Ubuntu Instance started to experience "Connection Refused" errors when trying to log in to the server using ssh. This issue only started to occur after the Uncomplica…
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OCI: Linux User Account Incorrectly Set to "nologin"A local user account on a Linux instance was configured to use the nologin shell in error, as the user account needs to be able to log in to the Linux instance. Attempti…
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Unable to Remove LVM Snapshot - “Logical volume XYZ contains a filesystem in use."Attempting to remove an LVM snapshot on a linux instance fails with the following error: # lvremove /dev/VGExaDb/LVDbVar1Snap Logical volume VGExaDb/LVDbVar1Snap contain…
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OCI: Oracle Linux [UEK-5] Panicks With: "BUG: Bad page state in process lvm pfn:cbea9d1"Applies To: Oracle Linux - Version 7 or later with UEK5 Symptoms: UEK5 can suffer from memory corruption panic. [229802.917409] loop: module loaded [229803.641151] BUG: … -
System crash with: NMI received for unknown reason XX on CPU YApplies to: Oracle Linux - Version 7 and later Symptoms System crashed Crash report: [ 5629.913381] Uhhuh. NMI received for unknown reason 10 on CPU 5. [ 5629.913382] Do…
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OCI: aide(1) is Failing with FIPSR ErrorApplies To: Linux OS – Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9] Linux x86_64 on Oracle Public Cloud Symptoms: AIDE is an intrusion detection uti…Alejandro Rodriguez L.-Oracle 65 views 0 comments 0 points Started by Alejandro Rodriguez L.-Oracle Linux -
Filesystem on iSCSI Volume is Not Mounted During BootApplies To: Oracle Linux - Version 8 and later Symptoms: Some filesystems randomly fail to be mounted during boot. The filesystems belong to iSCSI block volumes. Log can…
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Security Related Posts on Oracle Linux BlogAnalysis of CVE-2025-4598: systemd-coredump FIPS 140-3 for the Linux Kernel Understanding Spectre v2 Mitigations on x86 Pillars of protection—A holistic view of enterpri…
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Networking Related Posts on Oracle Linux BlogARP Internals: an in-depth exploration of how ARP functions RoCEv2 Congestion Counters Explained Oracle Linux 9.2 receives IPv6 Ready Gold Logo and meets USGv6-r1 standa… -
Migration Related Posts on Oracle Linux BlogUpdate CentOS Linux for free Still on CentOS Linux 7? Easily switch to Oracle Linux, a stable RHEL-compatible alternative Surprising reasons why CentOS users feeling str…
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Memory Management Related Posts on Oracle Linux BlogThe NUMA Awareness of the Linux Scheduler Memory Correctable Error (CE) - Userspace Control soft-offline pages oomwatch - A Userspace Out of Memory Killer - OLED Memstat…
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Data Storage Related Posts on Oracle Linux BlogIntroduction to ASMLib v3 Using drop_caches probably won’t crash your system What’s new for NFS in Unbreakable Enterprise Kernel Release 8? Device Mapper Multipath, an I…
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System Performance Related Posts on Oracle Linux BlogDetecting and debugging zombie memcg issues Syswatch - OLED Syscall latency... and some uses of speculative execution Tune it Up: Improving Redis Performance for Ampere …
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Oracle Cloud Infrastructure Related Posts on Oracle Linux BlogKVM Nested Virtualization in Oracle Cloud Infrastructure: A Hands-on Guide with Virtual Machines and Oracle Linux 9.5 Using Leapp to Upgrade Systems Managed by OS Manage…
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Multi-threading Related Posts on Oracle Linux BlogUnbinding Parallel Jobs in Padata Multithreaded Struct Page Initialization
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Kernel Related Posts on Oracle Linux BlogUEK8 Packaging Internals What’s new in File Systems with UEK8: Btrfs, XFS, and NFS updates Folio Wins Without Trying When cgroup v2 meets nftables: A migration story ign…
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Oracle Linux Learning HUBWelcome to Oracle Linux Learning HUB This thread provides you with information to help you grow your skillset using Oracle Linux. In this thread we have organized Oracle…
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Ksplice Related Posts on Oracle Linux BlogKsplice and Tracing Hooks in the Kernel Ksplice Known Exploit Detection for nftables (Netfilter) Pinning User-space Pages in the Linux Kernel: Exploring get_user_pages, …
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Hardware Architecture Related Posts on Oracle Linux BlogA study of the Linux kernel PCI subsystem with QEMU AMD Oracle Linux debuts on 4th Gen AMD EPYC processor Continued collaboration with AMD brings powerful solutions to c…
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Diagnostics Related Posts on Oracle Linux BlogIntroducing the list_lru iterator in drgn-tools Beyond EH Frame and Frame Pointers: The Technical Underpinnings of SFrame Closing A Hole In The Detection Of Buffer Overf…
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Software Development Related Posts on Oracle Linux BlogLibresource v2 Understanding process thread priorities in Linux Syscall latency... and some uses of speculative execution Backporting patches using git Three free Ebooks…
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Database Related Posts on Oracle Linux BlogWhy Oracle Database runs best on Oracle Linux Oracle Database Templates for Oracle Linux KVM now available! Connect from an Arm-based A1 Compute Shape to Autonomous Data…
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Boot-up Related Posts On Oracle Linux BlogVirtual Machine Secure Boot Database Updates Made Easy with Oracle Linux Working with UEFI Secure Boot on Oracle Linux Changing the default kernel in Oracle Linux | It's…
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System Administration Related Posts on Oracle Linux BlogUnderstanding FC Adapter HBA Drivers Under Linux SCSI Subsystem using qla2xxx (QLogic) HBA driver Know your /dev/disk/by- symlinks Write Your Own PMDA du vs df in XFS A …
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OL8 Instance Becomes Inaccessible Every Day Until Restarted AgainApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 – Oracle Linux 8 Symptoms: OL8 OCI instance starts normally, then the following day it becom…
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OCI : How to Install and Configure Performance Co-Pilot (PCP)Applies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 and later Linux x86-64 Goal This document explains how to install and…
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OCI: Some PDF Documents not Being Printed by CUPS and Remain in the QueueApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 – Oracle Linux 7 and later Symptoms Printers work correctly and are able to print PDF docume…
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OCI – Partition extension gives error “error: partition sectors exceeds the msdos-partition-table"APPLIES TO Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 SYMPTOMS On OCI, extended the block volume size from 2TB to 2.7TB but unable to extend the pa…