Linux
Discussion List
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OCI Linux: International Character Set Not Displayed CorrectlyApplies to Oracle Cloud Infrastructure Linux x86-64 Symptoms After international locale is installed and configured in a system, the international characters are not dis… -
lp Command Gives Error “no default destination available”Applies To: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux Symptoms: The system is configured with multiple printers in CUPS. The printers are ready an…
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Troubleshooting SSH Connection ErrorsApplies to Oracle Cloud Infrastructure Linux x86-64 Goal When having issues connection to an OCI IAAS instance, the following documents below may help with troubleshooti…
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OCI: ifcfg-ensN File is Empty After the Reboot with Error “Device name does not seem to be present”APPLIES TO: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 SYMPTOMS: Oracle Linux Instance network configuration file “/etc/sysconfig/network-scripts/i…
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OCI: Unable to install Ansible in OL8 when using OSMHApplies To: Oracle Cloud Infrastructure - Version N/A and later Symptoms: When trying to install Ansible using this document: , it gives the following error: $ sudo yum …
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OCI Linux Instance Boot Failure “dracut-initqueue[448]:Warning:/dev/disk/by-uuid/*** does not exist”APPLIES TO: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 SYMPTOMS: Oracle Linux Instance failed to boot and reports following error in the Console lo…
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OCI: Unable to Access the Internet From Cloned Ubuntu 20.04 InstanceApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms A new instance was created from a cloned boot volume of another running Ubuntu 20.0…
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OCI: Kspice command fail with error "ImportError:/lib64/libboost_regex-mt.so.1.53.0: file too short"APPLIES TO: Oracle Cloud Infrastructure Linux OS - Version Oracle Linux 7.0 and later SYMPTOMS Running Ksplice commands fail with the following error. $ ksplice Tracebac…
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Oracle Linux: How to prioritize IPv4 resolution over IPv6 resolution in a dual-stack environmentApplies To: Oracle Cloud Infrastructure Linux x86-64 Goal: This document describes how to prioritize IPv4 address resolution over IPv6 address resolution in a dual-stack…
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Oracle Linux - How to disable "sender non-delivery notification" for bounce mail in postfixApplies To: Oracle Cloud Infrastructure Linux x86-64 Goal: This document describes how to disable "sender non-delivery notification" for bounce mail in postfix. Solution…
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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… -
IPS Kernel module for IBM ServeRaid 7kHello. I was using Oracle Linux 6 on an old server using ServRaid 7k. When trying to install OL7 or OL8, the drives are not recognized. I know it was using IPS kernel mo…
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How to configure a printer to receive print requests from oracle cloud?Summary: Our Solaris 11.4 on Sparc systems have network printers configured with CUPS, now we are in the plan to migrate the systems to Oracle cloud infrastructure. I wo…
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How To Change the Volume I/O Scheduler at BootApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal: Disk I/O scheduler defines how the Kernel will schedule I/O requests for the disk. Som…
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OCI: Can Existing Users in New OCI Instances be Removed?Applies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal New OCI instance has a number of users present in /etc/passwd file, e.g.: bin daemon ad…
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OCI: "podman ps –s" Consumes CPU and Takes Several Minutes to CompleteApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86_64 Symptoms: In Oracle Linux 8 instance with several active containers, running command: $ podm…
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OCI: Linux Instance failed with error "Failed to switch root: Specified switch root path '/sysroot'"Applies to Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms System boots to Emergency Mode with the following seen in the file /run/initramfs/rd…
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Ksplice Error "Unable to Install This Update Because Your Running Kernel Has Been Modified"An Oracle Linux server encounters errors when attempting to download and install new ksplice uptrack updates, and fails with the error message, as seen in the following …
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How To Install 32-bit Packages on Systems Running 64-bit Versions of Oracle LinuxSometimes, specific applications on a server using x86_64 based architecture will need to use 32-bit OS Libraries, even though the version of Linux running on the server…
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How To Boot An Ubuntu Server Into Recovery ModeIf you need to troubleshoot or resolve problems with an Ubuntu Server failing to boot correctly, you can boot into recovery mode by selecting some options available in U…
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How To Reset the root Password on Oracle Linux In Rescue ModeIt is possible to reset the root password systems running Oracle Linux 7 or higher without knowing the current root password by booting the server into rescue mode via s…
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How To Downgrade a Distribution Upgrade on an Ubuntu Instance on Oracle Cloud Infrastructure (OCI)Linux distribution upgrades, including Ubuntu distribution upgrades, result in many major package upgrades, and in general it is not feasible to downgrade all the packag…
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How To Check The Network Configuration on a Linux InstanceThe ip command can be used with different options to check and configure network devices on a Linux system. To check the current network link-layer configuration for all…
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How To Create an Ubuntu Instance Using Oracle Cloud Infrastructure (OCI) Platform ImagesYou can create an instance running Ubuntu in OCI by selecting any of the available Ubuntu Platform Images when creating the instance. For more details on the current Pla…
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How to Configure KDUMP On Linux to Collect Kernel Panic Data from A Hung/Crashed SystemWhen a Linux system experiences a kernel panic and crashes unexpectedly or hangs, it can be configured to collect a crash dump of the system state and kernel calls leadi…
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How To Install & Configure KDUMP on Oracle Linux 61). Install the kexec-tools package: # yum install kexec-tools 2). Configure the amount of memory reserved for the kdump kernel in /boot/grub/grub.conf by adding the cra…
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How to configure KDUMP on Oracle Linux 71). Install the kexec-tools package if not already installed: To use the kdump service, you must have the kexec-tools package installed. To do so, type the following at …
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How to Configure KDUMP on Oracle Linux 8 and 91). If the kdump package is not already installed on your system, install it: # dnf install kexec-tools 2). With the proper administrative privileges, edit the /etc/defa…
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OCI: The “df -hT” Command HangsApplies to: Oracle Cloud Infrastructure - Version N/A and later Symptoms: OS level command like df -hT are hanging or provide no output. Cause The issue is due to a deco…
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Hello, what is the problem with "Oracle Cloud Infrastructure DNS | Multiple Regions | CN-1061707"? HSummary:Hello, what is the problem with "Oracle Cloud Infrastructure DNS | Multiple Regions | CN-1061707"? How long does it take to fix it? My business is all suspended.…