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For more information, please refer to this announcement explaining best practices for getting answers to questions.
Linux
Discussion List
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OCI - How To Enable Root User SSH-keys in OCI Oracle Linux Custom ImagesApplies to: Oracle Cloud Infrastructure Linux x86-64 Goal: The process of creating an OCI instance based on a Platform image, or a custom image based on a Platform image… -
OCI: How to Expand the Root Filesystem to Use The Available Space in the Boot VolumeApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal OCI instances can be created with a custom Boot Volume size. The size can be between 50…
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Unable to Get Internal Yum Repositories on OCI Instances while Using Private SubnetAPPLIES TO Oracle Cloud Infrastructure - Version N/A to N/A [Release 1.0] Linux x86 SYMPTOMS: While using an OCI instance on Private-Subnet ONLY (no access to internet a…
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OCI: IPv6 Address Not Assigned to OCI Ubuntu Instance by DHCPApplies to Oracle Cloud Infrastructure Ubuntu Linux 22.04 LTS Symptoms An IPv6 Address is created in a IPv6 enabled VCN and then assigned to an Ubuntu 22.04 LTS OCI inst…
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OSMH : Quick Setup Of OSMH For OCI InstancesApplies To: OS Management Hub Oracle Cloud Infrastructure Autonomous Linux Goal: To Setup OS Management Hub on a newly created OCI instance or an existing OCI instance. …
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Oracle Linux 9 now available as a platform image in OCISummary: Oracle Linux 9 now available as a platform image Services: Compute Release Date: Aug. 26, 2022 Oracle Linux 9 is now available as a platform image. For more inf…
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Oracle Linux 8: How To Setup VNC ServerApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 8.0 and later Information in this document applies to any platform. Goal …
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ExaCC CPU-Scale Up Fails With "smpboot: do_boot_cpu failed(-1) to wakeup CPU#"Applies to: Linux OS - Version Oracle Linux 6.0 and later Oracle Cloud Infrastructure Linux x86-64 Symptoms: After scale-up on an ExaCC Gen 2 system vCPUs missing on dom…
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SSH to Instance Failed at "Permission denied (publickey,gssapi-keyex,gssapi-with-mic)" in OCIApplies To: Oracle Cloud Infrastructure - Version N/A and later Information in this document applies to any platform. Symptoms: When SSH'ing to an instance, this "Permis…
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Install and Configure VNC Server on Oracle Linux 8The following video describes how to install and configure VNC Server on Oracle Linux 8: -
OCI: leapp upgrade failed with error: file #### from install of ####Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 on Oracle Public Cloud Symptoms: Leapp upgrade from OL7 to OL8 fails with below error and th…
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OCI - How to Enable sysstat – SAR Data CollectionApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Oracle Linux 8 and above Goal: This document outlines the steps required to setup and enable…
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Oracle Linux – How to Configure a Secondary VNIC (add IP Address)Applies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Oracle Linux 7 – Oracle Linux 9. Goal: Configure an IP address to a secondary VNIC Solution:… -
OSMH : Profile not Listed for Instance Upgraded using LeappApplies to: OS Management Hub - Version OS Management Hub 2.0 to OS Management Hub 2.0 [Release OSMH2] Linux x86-64 Symptoms On OSMH, matching OS version profiles not li…
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OCI: Password Authentication on Ubuntu Throws Error: No supported authentication methods availableApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 on Oracle Public Cloud Symptoms: On Ubuntu 20.04, if the parameter “PasswordAuthentication y…
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OCI : OSMH returns Http Status Code: 400. Error Code: MissingParameterApplies To: Oracle Cloud Infrastructure OSMH Management Stations Symptoms: When trying to register an OSMH Management station it shows the following error: 2024/05/29 13… -
OCI: Differences in Size Reported by Object Storage Bucket "s3fs" in OL7 and OL9 Instance.APPLIES TO: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 GOAL: Difference in the size reported by the object storage bucket "s3fs" in Oracle Linux 7 …
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How to Read the dnf history Output?Applies to: Linux OS - Version 8 and later Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal Possible values and descriptions of the columns shown wh…
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OCI: OL8 ARM Instance rpm process high memory usage followed by OOM and hungApplies To: Oracle Cloud Infrastructure Linux x86-64 Symptoms: OL8 ARM Instance rpm process consumed high memory usage followed by OOM and hung. rpm-4.14.3-26.0.1.el8.a…
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OCI: OCFS2 Mount Fails with "Internal logic failure while trying to join the group"Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms When mounting OCFS2 filesystem, an internal logic failure is reported: # mount /sVD…
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Oracle Linux: How to Calculate Memory UsageAPPLIES TO Linux x86-64 Oracle Cloud Infrastructure GOAL This document describes how to calculate Linux memory usage. SOLUTION 1. Calculate memory usage using SAR $ sar …
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OCI- The root filesystem is periodically filling up to 100% space usedApplies To Oracle Cloud Infrastructure Linux x86-64 Symptoms $ df -h | egrep "Filesystem|ocivolume-root" Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/…
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OCI: - Resize Boot Volume in Oracle Linux 7 and 8 Instances in OCI [Video]APPLIES TO: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal This video explains how to extend the partition of boot volume in Oracle Linux 7 and 8 …
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OCI: Port 80 and 443 Became Inaccessible After RebootAPPLIES TO Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 SYMPTOMS 3rd party Web Application Site became inaccessible after server reboot even the port…
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Users Are Logged Out After 10 Minutes with Message "timed out waiting for input: auto-logout"Applies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 5.0 and later Linux x86-64 Symptoms After 10 minutes of idle time, users …
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OCI: Add sudo root Permissions to Regular Linux User in Oracle LinuxApplies to Oracle Cloud Infrastructure - Version N/A and later Oracle Linux x86-64 Goal There is a need for an additional regular user (testuser in this example) to be a…
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OCI: DHCP Fail After Reboot With Error "libdns-export.so.1102: cannot open shared object file"Applies to Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 and later Information in this document applies to any platform. Sympto…
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OCI – How To Remove Container Images From Private Container Registry and Delete the Empty RepositoryApplies to: Linux OS – Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9] Linux x86_64 on Oracle Public Cloud Goal: This document provides steps on how to…
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Linux: Convert RHEL7 to Oracle Linux 7 RepositoriesApplies To Linux OS Goal How to convert RHEL7 to Oracle Linux 7 Repositories Note: These steps are not supported for Oracle Cloud Infrastructure (OCI). For OCI instances…
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OCI: "linux-config" Package Update Starts The firewalld serviceApplies TO Oracle Cloud Infrastructure Linux OS SYMPTOMS oci-linux-config package updated to the version 2.0-1.0.25.el8.noarch started the firewalld service $ systemctl …
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OCI: How To Retrieve RPM Information Using RepoWatchApplies to: Linux x86-64 Goal This document provides more details on how RepoWatch can be used to retrieve RPM information. Solution The RepoWatch uses the yum repo meta…
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Oracle Linux – How to Increase Entropy ValueAPPLIES TO: Linux OS – Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9] Linux x86_64 on Oracle Public Cloud UEK5 / UEK6 / UEK7 GOAL: Increase entropy va…Alejandro Rodriguez L.-Oracle 121 views 0 comments 2 points Started by Alejandro Rodriguez L.-Oracle
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How To Troubleshot Login Problems Caused by .bashrcApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal If the configuration of .bashrc cause it to exit, that can cause problems like preventi…
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X-Server access is denied on hostTrying to launch GUI wizard of Oracle FMW Infrastructure 12.2.1.3.0 on Linux 7 using jdk-8u211-linux-x64 but receiving the following error: X-Server access is denied on … -
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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When will the latest Oracle Linux AMIs be posted on AWS?Summary: The Public AMIs for Oracle Enterprise Linux on AWS are a few minor versions back. When will the latest AMIs be made available? Content (please ensure you mask a…
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OSMH: Setting Up Dependency Jobs in OS Management HubAPPLIES TO Oracle Cloud Infrastructure OS Management Hub (OSMH) GOAL Explain job dependency limitations in OSMH. SOLUTION OS Management Hub does not currently support di…
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OCI: How To Change ssh Port Number in UbuntuApplies To: Oracle Cloud Infrastructure Ubuntu OS Goal: This document explains steps to change the ssh port number of an Ubuntu instance from Port 2222 to 22. Solution: …
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How to Set an Expiration Date for Local User PasswordsApplies to: Linux OS - Version Oracle Linux 6.9 and later Linux x86-64 Goal This document describes how to set expiration dates/intervals for local user passwords on Ora…
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OCI: SAR report “/var/log/sa/” not generating after upgrading instance to Oracle Linux 8APPLIES TO: Oracle Cloud Infrastructure Linux x86-64 SYMPTOMS Why is SAR report “/var/log/sa/” not generating after upgrading to OL8? CAUSE Required sysstat services are…
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OL8: SSH User Session and Process Killed “systemd-logind: Session of user <user> is idle, stopping"On Oracle Linux 8, SSH sessions of users and their processes are killed automatically after some time, with the following systemd-logind error seen in the logs: --/var/l…
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OCI: "sshd.service" fails to start on bootThe sshd.service on a linux instance fails to start on boot, with the following message is seen on the console during the boot process: Failed to start OpenSSH server da…
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OCI – Ubuntu 22 .04 LTS Instance Stops Responding 20 Minutes After BootApplies to: Oracle Cloud Infrastructure - Version N/A and later Ubuntu 22.04 LTS Symptoms Twenty minutes after being started, the instance stops responding completely – …
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OCI: Unable to Perform dnf updateSymptoms: “dnf update” fails with the following error: # dnf update Last metadata expiration check: 0:09:35 ago on Fri 11 Aug 2023 07:42:44 AM GMT. Error: Problem: packa…
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OCI: How To Clean Or Free Space In /boot Filesystem In Oracle LinuxAPPLIES TO: Oracle Cloud Infrastructure Oracle Linux GOAL How To Clean Or Free Space In /boot Filesystem In Oracle Linux [root@ server0 opc]# df -hT /boot Filesystem Typ…
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Oracle Linux – High CPU Usage by Unknown Process Prevents Users to Login.Applies to: Linux OS – Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9] Linux x86_64 on Oracle Public Cloud Goal: Find out why users are not able to log…
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OCI: How to Run a Script During Boot in Ubuntu Linux 22.04Applies to: Oracle Cloud Infrastructure - Version N/A and later Ubuntu Linux x86-64 Goal There is a need to run a custom script to execute a set of commands during the s…
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How To Configure DB Nodes to Generate VMCore on iSCSI Boot DiskApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal Database nodes that boot from iSCSI need special configuration to be able to create vmc…
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OCI: Unable To Mount Block Volume To Multiple Linux InstanceAPPLIES TO: Oracle Cloud Infrastructure Linux x86-64 SYMPTOMS Customer is getting an error while mounting a block volume restored from a backup [root@xxxxxxxxxxx-7-8 ~]#…
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New Ubuntu Instance Gets Error "No route to host" For Hosts On External NetworksA newly created Ubuntu Instance running in Oracle Cloud Infrastructure (OCI) encounters an error "No route to host" whenever it tries to connect to HTTP and HTTPS servic…
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How To Configure Secure FTP on Oracle Linux 8The Oracle Linux 8 distribution contains the vsftpd package, which when installed and configured, allows an Oracle Linux 8 system to run a secure ftp (ftps) server. This…
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Yum Commands Hang on Oracle LinuxYum commands, including yum update, hang whenever anyone attempts to run them on an Oracle Linux server. If, apart from yum or rpm commands, no other commands are hangin…
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How to Configure SSH Port Forwarding on LinuxLocal port forwarding over SSH (also known as SSH Tunneling) maps a local port on the client system to a remote port on the server system. This configuration enables you…
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How to Boot Oracle Linux 7 (OL7) Into Rescue And Emergency Modes Via 'systemd'In OL7, both rescue mode and emergency mode are systemd targets (that replace runlevels of previous OL versions). Note Rescue mode allows the system to be repaired in si…
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How To Install Security Updates On Oracle Linux Using YUMIt is possible to use package management tools such as yum or dnf included in Oracle Linux to only install security updates, rather than applying all available updates t…
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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…
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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…
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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…