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Linux
Discussion List
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How to Bring up Secondary VNICs in an Oracle Cloud Infrastructure(OCI) Oracle Linux 7 InstanceHow to add a secondary VNIC that is persistent through reboots in OL7 using systemd Unit File 1. Use the OCI Web Console to create and attach a secondary VNIC, see: http… -
Ubuntu GPU Image Problem After Kernel UpgradeAn Ubuntu GPU instance fails to load its Nvidia GPU drivers upon being rebooted after a kernel upgrade, when the following command was run prior to the reboot: # apt-get… -
How to delete or change the primary VNIC?As I cannot move the primary VNIC to another VCN, I have added a secondary one and would like to make this primary and then delete the old primary. How can I do that? -
Oracle Linux Automation ManagerOracle Linux Automation Manager is based on the open-source projects Ansible and AWX, is a task engine and web interface for scheduling and running Oracle Linux Automati…
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SSH Permission denied (publickey,gssapi-keyex,gssapi-with-mic) when using PuTTYGEN key files.Using PuTTYgen ssh keys with the OpenSSH ssh command on a linux system fails with Permission denied errors because it uses a different format than OpenSSH keys. Attempti…
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OSMH: kexec-tools: Interrupted by header callback: Inconsistent server dataApplies To: Oracle Cloud Infrastructure - Version N/A and later OS Management Hub (OSMH) Symptoms: Oracle Linux instance under OSMH control reports the following error d…
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Oracle Linux: rhn-plugin Error Observed on Oracle Linux Instance Registered to OS Management HubApplies To Linux OS - Oracle Linux 7.0 and above. Summary Instance is managed via OS Management Hub in Oracle Cloud Infrastructure (OCI) and the below error occurs durin…
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OCI: ExaCC Linux Instance Crashed with "Kernel Panic: NULL Pointer Dereference" in trailing_symlinkApplies: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux Server Release 7/8 Symptoms: ExaCC instance with UEK6 kernel version 5.4.17-2136.336.5.3.2.el8u…
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OCI: SSH Login Failure with "Permission Denied (Publickey)" Error on Ubuntu InstanceApplies To: All Users Oracle Cloud Infrastructure - Version N/A and later Symptoms: The SSH login to the Ubuntu instance using the ubuntu user is failing with the follow…
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OCI: In Oracle Linux 7/CentOS 7 Instances, /etc/resolv.conf Gets Wiped After the First RebootApplies To: Oracle Cloud Infrastructure Oracle Linux Server release 7 Symptoms: The /etc/resolv.conf file is wiped out after the first reboot in Oracle Linux 7 /CentOS 7…
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Oracle Linux: System RAM does not Match with the Value in OCI ConsoleApplies to: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux 7 and later Goal: Understand why Oracle Linux does not show the same amount of Memory (RAM) … -
Oracle Linux: SSH login delay (~30s)Applies To: Oracle Linux 7 and later Symptoms: Users report SSH takes ~20–30 seconds to log in after boot, even though the OS finishes booting quickly. systemd-analyze b…
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Oracle Linux: How to Downgrade Multiple RPM Packages to Match a Good Known SystemApplies to: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux 8 and later Goal: This document explains steps to downgrade multiple RPM Packages to match a…
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After Adding a New GRUB_CMDLINE_LINUX to /etc/default/grub System Is Not Booting as ExpectedApplies To: Oracle Linux 7 and Later Symptoms: A new GRUB_CMDLINE_LINUX line was added to enable "audit=1", in /etc/default/grub After that, the boot change and the netw…
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Oracle Linux: How To Setup a OCFS2 on LVM in a Corosync/Pacemaker clusterApplies To: Oracle Linux 8 Oracle Cloud Infrastructure Goal: This Document will describe how to set up a clustered filesystem accessible simultaneously on both nodes usi…
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how can we mount the boot volume backup on same server in oel 9Summary: We have taken backup of boot volume and trying to mount on same server for data restoration. unable to mount. getting mount: /old_boot: unknown filesystem type …
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Oracle Linux: Active Directory User Fails to Login with Error "Permission Denied"Applies to: Oracle Linux Symptoms: While trying to login as an Active Directory user, the user is unable to login and receives a "Permission Denied" message. /var/log/se…
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Oracle Linux – Using GNU Parallel command to improve backup(s) to an NFS ServerAPPLIES TO Oracle Cloud Infrastructure - Version N/A and later Oracle Linux 7/8/9 GOAL Improve network throughput and reduce times to backup important data/information t…
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Oracle Linux: "adcli: couldn't connect to <realm> domain: Failed to create kerberos context:"Applies to: Linux OS - Version Oracle Linux 7.0 and later Symptoms: Joining a Microsoft Active Directory domain fails: # adcli -v join -U * Using domain name: * Calcu…
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Oracle Linux: How to Create New systemd TimersApplies To: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux 7/8/9 Goal: This article is to document how to create new systemd timers, a systemd way of r…
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Oracle Linux: Using _netdev In Local Filesystem Can Cause Systemd Dependencies ProblemsApplies To: Oracle Linux 8 Symptoms: If “_netdev” is specified as an option on /etc/fstab for a local (non-network mounted) filesystem in /etc/fstab, it can cause system…
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Oracle Linux: How to Use the Options disp_qos and dispatcher in /etc/audit/auditd.confApplies To Linux OS - Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9] Summary To understand the usage of the options disp_qos and dispatcher in /etc/au…
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Oracle Linux: Understanding "installonly_limit" Parameter Used with YUM/DNFApplies To Linux OS - Version Oracle Linux 7.0 and later Summary This document is intended to provide understanding on the use of the parameter "installonly_limit" in /e…
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OSMH – OSMH Plugin Enable fails with Error "plugin oci-osmh waits when plugin osms is enabled"Applies to: Oracle Cloud Infrastructure Linux x86-64 Symptoms: Unable to enable osmh plugin fails with error "plugin oci-osmh waits when plugin osms is enabled" Cause: I…
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Oracle Linux: How to Check the Interface Pause Parameters Using "ethtool"Applies To Linux OS - Version Oracle Linux 7.0 and later Summary This post is intended to guide on how to review the pause parameters. Solution Pause parameters are the …
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OSMH: OSMH Managed Instance Update Fails with Error “Requires: ksplice-helper"Applies To: Oracle Cloud Infrastructure OS Management Hub (OSMH) Symptoms: OSMH managed instance package updates fails with below error. Error: Package: 2:glibc-2.17-326…
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OCI: How to upgrade Kernel from UEK6 to UEK7 on OSMH managed instance after leaap upgradeAPPLIES TO: Oracle Cloud Infrastructure OS Management Hub (OSMH) SYMPTOMS After leapp Upgrade from Oracle Linux 7 to Oracle Linux 8 the Running Kernel remains UEK6, Ther…
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OL: top/mpstat command may show steal time on some cpus during heavy network trafficApplies to: Linux OS - Version Oracle Linux 8.0 and later Symptoms: Top or mpstat may show steal time on some cpus during heavy network traffic %Cpu11 : 14.6 us, 52.5 sy…
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Oracle Linux: Sosreport Command Shows Error "binary is deprecated"Applies To Linux OS - Version Oracle Linux 8.0 and later Symptoms The sosreport command shows the error below when run on systems with sos version 4.9 and above. # sosre…
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Oracle Linux: Paravirtualized Block Volume Not Mounting After OCI Instance RestartAPPLIES TO: Linux OS–Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9] Oracle Cloud Infrastructure SYMPTOMS: After a full OS reboot, the filesystem is no…