Linux
Discussion List
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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… -
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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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… -
Pgp Encryption Not Working After OS Upgrade "gpg: decryption failed: No secret key"After upgrading a linux system from Oracle Linux 6 to Oracle Linux 8 and importing the pgp public and secret key to the upgraded server, the existing jobs which were usi…
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Leapp Pre-upgrade Check Fails with "Upgrade requires links in root directory to be relative"Running a pre-upgrade check from Oracle Linux 7 to Oracle Linux 8 using leapp fails with the following error: # leapp upgrade --oraclelinux =============================…
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OCI : How To Get Details of A Scheduled Job In OSMS Using the CLIIt is possible to get the details of a scheduled job in OSMS using the OCI CLI, including the "update-type" value. To get details of a scheduled job, use the oci command…
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How To Create an OSMS Custom Software Source Using OCI CLI InterfaceThis document describes how to create an OSMS Custom Software Source using the OCI CLI interface (oci command). The following example shows how to set up a custom OSMS s…
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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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Nameserver entries in /etc/resolv.conf reset on rebootOCI VM Oracle Linux Server 7.9 In my /etc/resolv.conf I have two instances of nameserver specified: nameserver xx.xx.x.**** nameserver xx.xx.x.**** After a reboot, the /… -
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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OCI: Ubuntu Instance Fails to Boot With Kernel Panic “Not syncing: VFS: Unable to mount root fsAPPLIES TO: Oracle Cloud Infrastructure Linux x86-64 SYMPTOMS On OCI Ubuntu Instance, After Installing a new Kernel the Instance no longer boots using the latest kernel,…
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OCI: No Response from "yum repolist" in RedHat InstanceApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms Unable to install updates in Red Hat image based instance. Cause This is a Red Hat …
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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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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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How to set soft or hard limit for the number of user's processes “nproc”?APPLIES TO: Oracle Linux Cloud Service - Version Oracle Linux 6.0 and later Linux OS - Version Oracle Linux 6.0 and later Oracle Cloud Infrastructure - Version N/A and l…
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Oracle Linux - How to remove GRUB2 passwordApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 on Oracle Public Cloud GOAL How to remove grub2 password SOLUTION To remove the grub2 passwo…
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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: 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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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…