Category 631
Discussion List
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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 … -
Linux: Use attempting to login or "su" reports error: "Resource temporarily unavailable"Applies to Oracle Linux - Version 7 and later Oracle Cloud Infastructure Symptoms Login or su to a particular user fails sometimes. The logs show the following error: No…
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Oracle Linux: SSH Security Configuration Rollback ProblemApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 to Oracle Linux 9.3 [Release OL7 to OL9U3] Information in this docume…
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Oracle Linux: Rsyslogd error: fopen() failed for path: '/var/lib/rsyslog/imjournal.state.tmp'Applies to: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux x86-64 Symptoms Following error occurs many times in /var/log/messages and little to no othe…
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OCI: Linux Instance Unstable and Keeps Rebooting with “check_map_access+0x1f/0x48”Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms Oracle Linux instance becomes unstable after installing “datadog” agent and it keep…
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Limiting the use of the 'su' command to specific groups related to 'su'.I intend to create a 'wheel' group and modify permissions for groups related to 'su' command usage so that only those groups can utilize the 'su' command. Additionally, …
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Oracle Linux: Installation of compat-libstdc Fails with "Unable to find a match: compat-libstdc"APPLIES TO: Linux OS - Version Oracle Linux 8.0 and later Linux x86-64 SYMPTOMS An application on Oracle Linux 8 requires compat-libstdc++-33, however when installing th…
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Oracle Linux: audit Logs are Also Going to /var/log/messagesApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms: /var/log/messages file significantly increase in size and mostly contain the audit…
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OCI: Yum Update Fails With duplicate package errorApplies to Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal When trying to use yum to update packages on a system, it fails with an error such as th…
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Oracle Linux Inconsistent swappiness value with cgroup "memory.swappiness"APPLIES TO: Linux OS – Version Oracle Linux 8 Linux x86_64 SYMPTOMS: OL8 instance swap upto 2GB even though the kernel parameter "vm.swappiness " is set to 1. NOTE – vm.…
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Oracle Cloud Agent Installation Fails With Error"unpacking of archive failed on file <file name>"Applies To: Oracle Cloud Infrastructure Oracle Linux x86-64 Symptoms Oracle Cloud Agent installation Fails on OCI Centos Instance with error: Transaction Summary Install…
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OCI: Getting Error "Curl error (6): Could not resolve host" While Running "yum update"Applies to: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux x86-64 6 and later Symptoms Getting errors when running yum update: # yum update -y Oracle L…
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OCI: How to Force Reboot a Linux Instance Using AnsibleApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal Ansible is being used to manage Linux instances. To reboot the instances, the ansible r…
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OCI: systemctl status rc-local.service Main Process Exited code=exited status=203 EXEC.Applies to Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 to Oracle Linux 9.3 [Release OL7 to OL9U3] Linux x86-64 Symptoms Faile…
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How to Easily Check I/O Usage by Process in LinuxApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal Linux systems do not generally log past I/O activity per process. It is however quite s…
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Oracle Linux 7: How to Change Current UEK Kernel Release To a Different UEK ReleaseApplies To: Oracle Cloud Infrastructure - Version N/A and later Oracle Linux x86-64 - version 7 Goal: Oracle Linux 7 was distributed in its 1st release 7.0 with kernel U…
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OCI: FTP Connection Fails with "Login failed" When the User's Shell is Set to "nologin"Applies to: Oracle Cloud Infrastructure Linux x86-64 Symptoms: When trying to connect to an account via FTP, the connection fails with the “Login failed” error: Trying 1…
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OCI : iSCSI Block Volumes Not Attached During BootApplies to: Oracle Cloud Infrastructure Oracle Linux - Version 7 and later Symptoms iSCSI block volumes are not detected during system boot. There are no active iSCSI se…
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OCI: Unable to Connect to Instance using Putty or WinSCPApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms Unable to connect to an instance using Putty or WinSCP. While SSH from the Windows …
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OSMH: Software Source Sync failed with error "Failed writing received data to disk/application"Attempting to perform an OS Management Hub (OSMH) Software Source Sync fails with errors such as "Download failed: Curl error (23): Failed writing received data to disk/… -
OCI: dnf update fails with error “no match for argument”Applies To Oracle Cloud Infrastructure Linux x86-64 Symptoms While attempting to update packages, the “no match for argument” and “Error: No packages marked for upgrade”…
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OSMH: station-setup.sh File is Missing in Directory /opt/oracle/mgmt_agent/plugins/osmh/stateDir/After successfully deploying the OS Management Hub (OSMH) Management Station, the station-setup.sh file does not appear in the directory /opt/oracle/mgmt_agent/plugins/o…
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Oracle Linux: rpm/yum/dnf Commands Fails with “Command failed: rpmdb open failed”Applies to: Oracle Linux - Version 7 and later Symptoms The following errors appear while using rpm/up2date/yum/dnf commands: $ sudo up2date --nox --register rpmdb: PANI…
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OSMH: How to Assign/Update New Profile to Existing OSMH Managed Instance?There are circumstances in which a user may want to assign a new profile or update a profile on an instance that is already being managed by OS Management Hub (OSMH), su…
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OCI: ssh Connection Fails With “Bad configuration option” ErrorAPPLIES TO Oracle Cloud Infrastructure - Version N/A and later Linux x86_64 SYMPTOMS When connecting from a Linux system with ssh, the connection fails and the following…
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How to Install and Configure Performance Co-Pilot (PCP)Applies to Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal This document explains how to install and configure Performance Co-Pilot (PCP) for analy…
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OCI: YUM/DNF Fails with "Curl error (23): Failed writing received data to disk/application for"Applies to: Oracle Cloud Infrastructure Linux x86-64 Symptoms: While running “yum” or “dnf” commands (like the “yum update” command), the package's download operation is…