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Discussion List
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OCI - How To Recreate ocfs2 cluster.conf with global-heartbeat optionApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal: This document outlines the steps required to recreate the /etc/ocfs2/cluster.conf usin… -
OCI: ssh to instance fail with error "packet_write_wait: Connection to IP port 22: Broken pipe"Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms: When trying to ssh into an instance, it fails with the error below: $ ssh packet…
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OCI-Ubuntu-Instance-Fails-to-BootApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms An Ubuntu instance fails to boot, the following is seen in the console: Boot Option…
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OCI: Unable To Mount OCFS2 Filesystem Due To Unavailability of Port 7777Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 on Oracle Public Cloud Symptoms: OCFS2 cannot be mounted. [root@test]# mount /s10 mount.ocfs…
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OCI: ABRT:OL7:iscsiadm segfaults when run as non-root user and with iscsi block volumesApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms Executing the ‘iscsiadm -m session’ with the ‘orarom’ user on OL7 below fails with …
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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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OCI: How To Migrate Iptables Firewall Rules to a New ServerApplies to Oracle Cloud Infrastructure - Linux OS Goal How to easily copy your active iptables rule set from one server to another. Solution To migrate your iptables fir…
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OCI: Unable To Use CIFS Utils After Patching to Kernel uek-5.15.0-203.146.5.1.el8uek.x86_64Applies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 8.5 with Unbreakable Enterprise Kernel [5.15.0] and later Linux x86-64 Sy…
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How To Disable Weak Cipher And Insecure HMAC Algorithms in SSH services for Oracle Linux 6 and laterApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal: This article shows how to disable weak ciphers like CBC and insecure MACs like HMAC MD…
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OCI Ubuntu: "apt update" Returns "Could not resolve 'security.ubuntu.com'"Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms: When executing "apt update" or "apt-get update" on Ubuntu, the command can return …
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OCI: “no-port-forwarding, no-agent-forwarding, no-X11-forwarding" in root user authorized_keysApplies to : Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal In OCI Oracle Linux platform image instances, the file /root/.ssh/authorized_keysis au…
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OCI: yum reports two different versions of the "setup" packageAPPLIES TO Oracle Cloud Infrastructure Linux OS SYMPTOMS Duplicated packages as yum reports two different versions of the "setup" package hence fail to yum update "setup…
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Linux: How to Install and Configure OSWatcher Using RPMAPPLIES TO: Linux OS - Version Oracle Linux 6.0 to Oracle Linux 8.8 [Release OL6 to OL8U8] Oracle Cloud Infrastructure Linux x86-64 GOAL: This document explains the step…
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OCI: journalctl Process Causing High CPU UtilizationApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 on Oracle Public Cloud Symptoms: journalctl consumes high CPU utilization. [root@test ~]# to…
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OCI: Mount NFS Share with the Correct NFS versionApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms: Issues detected while trying to mount the NFS share with nfs version 4. The comman…
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OCI: How To Add Ksplice Key To An Oracle Linux InstanceApplies to Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Goal This document describes how to add the key for Ksplice on an OCI Oracle Linux instance. …
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Linux: Podman Container Failed to Start: "Error: unable to start container runc: runc create failed”Applies to: Linux OS - Version Oracle Linux 8.0 and later Linux x86-64 Symptoms Podman container failed to start returning error below: $ podman start coder-mdbaque Erro…
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kernel: connectionX:0: detected conn error (1020)Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 and later Symptoms: Oracle Linux 7 instances running iSCSI may experi…
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OCI: Linux Diagnostic CollectionsApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 GOAL When a linux system runs into unforeseen hang or crash or performance issue, some logs/…
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OCI: Oracle Linux 9 Instance Looses the Network Configuration every 24 HoursApplies to Oracle Cloud Infrastructure Oracle Linux Symptoms An Oracle Linux 9 system that boots via iPXE, default in OCI, which normally have the dhcp module automatica…
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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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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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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: 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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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…