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Discussion List
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How to validate that sudoers files and its included files have the correct syntaxAPPLIES TO: Oracle Cloud Infrastructure Linux x86-64 GOAL: When editing /etc/sudoers file it is recommended to do it with visudo since it validates the syntax for errors… -
OCI – Yum Update Error: <URL>: [Errno 14] HTTP Error 403 – Forbidden Trying other mirror.APPLIES TO: Oracle Cloud Infrastructure Linux OS SYMPTOMS yum update oryum repolist command showing error HTTP Error 403 – Forbidden Trying other mirror # yum repolist L… -
OCI: How to Enable Password Based Authentication on Ubuntu 22.04 InstanceApplies To: Oracle Cloud Infrastructure - Version Ubuntu 22.04 and later Goal: Enable password authentication on OCI Compute Ubuntu Instance. Solution: Login to OCI Comp…
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OCI: User Exceeded Maximum Active ConnectionsApplies to Oracle Cloud Infrastructure Linux x86-64 Symptoms The following is seen in the /var/log/messages logs: Apr 26 08:58:42 usiadecnobiap01 dbus-daemon[1675]: [sys…
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OCI: How to add secondary AD servers in SSSDAPPLIES TO: Oracle Cloud Infrastructure Linux x86-64 GOAL: By default SSSD only allows a primary and a secondary AD using ad_server_primary ad_server_backup To add more …
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OCI: Yum Update Is Ending Up With Error Error Package tuned-profiles-oci (@ol7_optional_latest)Applies to: OCI Compute - Version N/A and later Linux OS - Version Oracle Linux 7.0 and later Symptoms: #yum update Loaded plugins: langpacks, ulninfo Resolving Dependen…
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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: 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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OCI: How to change or add a label to an XFS file systemAPPLIES TO: Oracle Cloud Infrastructure Linux x86-64 GOAL: Some systems use LABELS instead of UUIDs to mount their file systems. This is particularly true with Exadata s…
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Oracle Linux 7/8: iscsid Service Fails When Using Oracle Ksplice and SELinux in Enforcing ModeApplies to: Linux OS - Version Oracle Linux 7.0 to Oracle Linux 8.0 [Release OL7 to OL8] Oracle Cloud Infrastructure Linux x86-64 Linux ARM 64-bit Symptoms Starting the …
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OCI/EXACC: After Upgrading to ExaData 23.1 (OL8-based) SSH Logins Fail with "Authentication failed."Applies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Exadata CC Symptoms: After uprading to Exadata 23.1, logins via ssh Fail with the following …
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OCI: mkfs.btrfs does not always trigger an entry in /dev/disk/by- uuidApplies to: Oracle Cloud Infrastructure Linux x86-64 Symptoms: Unable to mount brtfs filesystem intermittently via fstab using UUID $ mount -av mount: /aplm/scratch does…
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Oracle Linux: "ABORT_TASK: Sending TMR" Messages Caused System Crash or HangApplies to: Linux OS - Version Oracle Linux 6.0 to Oracle Linux 7.9 [Release OL6 to OL7U9] Linux x86-64 Symptoms: The system is experiencing crashes or hangs and "ABORT_…
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OCI – How to install/update specific CVE and ELSA in Oracle Linux using yum commandsAPPLIES TO: Oracle Cloud Infrastructure Linux OS SYMPTOMS How to install/update specific CVE & ELSA number in Linux using yum command Solution Follow the below commands …
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OCI: Unable to run sudo to root with error "sudo: no valid sudoers sources found, quitting"Applies To Oracle Cloud Infrastructure Linux x86-64 Symptoms Unable to run “sudo su –“ command due to issues seen in files located the /etc/sudoers.d / directory $ sudo …
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OCI: Instance unable to boot due to missing /etc/fstab fileApplies to Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms The instance fails to boot normally and instead booted to maintenance mode and the r…
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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…
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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…