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Linux: How To Extend a ROOT(/) Filesystem that is on a Logical Volume Manager (LVM) VolumeThis article describes how to extend the root filesystem "/" on Oracle Linux when it is located on an LVM volume. This procedure may be necessary if the root filesystem … -
SUDO Error "sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set"After connecting to the instance as an opc user, when you try sudo to root user, the following error is seen: [opc@ ~]$ sudo su - sudo: /usr/bin/sudo must be owned by ui…
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OCI: Yum Reports Error "Could not resolve host: yum$ociregion.$ocidomain; Unknown error"When trying to install packages on an Oracle Cloud Instance running a custom Oracle Linux image, yum fails with the following error: # yum -y install net-snmp Loaded plu…
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SSH Fails With Error: "FIPS mode initialized FIPS mode initialized ssh: connect to host <host name>SSH connections to an Oracle Linux 7 or higher fail, with the following errors logged to /var/log/secure: Oct 28 09:44:40 sshd: FIPS mode initialized Oct 28 09:44:40 s…
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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…
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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 64 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 BlogUnderstanding Spectre v2 Mitigations on x86 Pillars of protection—A holistic view of enterprise security Ksplice Known Exploit Detection for DirtyPipe, Cgroup, fsconfig …
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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 Blogoomwatch - A Userspace Out of Memory Killer - OLED Memstate - OLED PKRAM Linux Internals: Memory UE Handling and HWpoison Injection Detecting Kernel Memory Leaks using a…
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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 BlogA Store Type Enum for the Maple Tree New Btrfs Features in UEK 8 Introducing adaptived - a simple cause-and-effect daemon PCI Express Advanced Error Reporting - An Intro…
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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 Known Exploit Detection for nftables (Netfilter) Pinning User-space Pages in the Linux Kernel: Exploring get_user_pages, pin_user_pages, and Page Table Walking K…
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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 BlogClosing A Hole In The Detection Of Buffer Overflows With GCC BPF: Making Split BPF Type Format (BTF) more resilient Introducing Oracle Linux Enhanced Diagnostics scripts…
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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 BlogUsing Leapp to Upgrade Oracle Autonomous Linux 7 Instances scsi-cli - SCSI device query utility NetworkManager Dispatcher Scripts Learn how to configure Oracle Linux for…