Linux
Discussion List
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OCI: Ubuntu ufw Fails to Open Ports while firewalld is Installed and RunningApplies to: Oracle Cloud Infrastructure - Version N/A and later Ubuntu OS Symptoms: On an Ubuntu 22.04 images, firewalld was installed and started while ufw was configur… -
SFTP/SSH Client Sometimes Reports Host Key Changes When Connecting to ServerApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 6.0 and later Any platform. Symptoms An application or SFTP/SSH client re…
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How to Configure RDP on an Ubuntu 20.04 InstanceThe following steps show how to install a Gnome 3 desktop and xrdp on a standard Ubuntu 20.04 instance. This will allow the Ubuntu instance to work with the RDP protocol… -
OCI: LFTP Transfer From On-Prem To OCI Fails With "Access Failed: 550 Failed to Change Directory"Applies to: Linux OS - Version Oracle Linux 7.0 and later Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 SYMPTOMS File Transfer From On-Premises to OCI…
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How To Install a Graphical Desktop on an Ubuntu Instance1). From a shell prompt, run the following commands to install the Xfce4/xubuntu desktop, which is a light-weight GUI desktop for Ubuntu: (ubuntu) $ sudo apt update (ubu…
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OCI: Managing DHCP Options For Linux Instances in a VCNTo specify DHCP options for a linux instance, you need to set the DHCP options for the specific subnet in the virtual cloud network (VCN) that your linux instance is usi…
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Sudo Fails with Error Message Ending With "/usr/bin/sudo: No such file or directory"An Oracle Linux or Red Hat Linux based server tries to run sudo commands, but the commands fail with the following error message: "/opt/rh/devtoolset-11/root/usr/bin/sud…
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How To Configure a Yum Repository On Oracle Linux 7Yum is used to install, update and manage packages on Oracle Linux 7. Yum can also be used to connect to package repositories. Yum is configured to work with the Oracle …
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How To Configure Secure FTP on Oracle Linux 8The Oracle Linux 8 distribution contains the vsftpd package, which when installed and configured, allows an Oracle Linux 8 system to run a secure ftp (ftps) server. This…
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Yum Commands Hang on Oracle LinuxYum commands, including yum update, hang whenever anyone attempts to run them on an Oracle Linux server. If, apart from yum or rpm commands, no other commands are hangin…
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How to Use FIREWALLD on Oracle Linux 8Oracle Linux 7 and higher comes with the package firewalld, which is used to configure and manage firewall rules. This video explains how to set up and use firewalld on …
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How To Boot Into Single User Mode on Oracle Linux 6You may wish to boot into single user mode on Oracle Linux in order to perform system maintenance, or to attempt to recover or repair a server that is experiencing softw…
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How to Configure SUDO To Allow Non-Root Users to Run Privileged CommandsThe "sudo" command is used to allow non-root users to run commands that require root privileges. You can configure sudo to allow a user to run all commands in the same w…
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How to Add a Repository to an Ubuntu InstanceTo add a repository to a linux cloud instance running Ubuntu, add the details for the repository you wish to add to /etc/apt/sources.list or to the /etc/apt/sources.list…
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How to Configure SSH Port Forwarding on LinuxLocal port forwarding over SSH (also known as SSH Tunneling) maps a local port on the client system to a remote port on the server system. This configuration enables you…
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OCI - Installing PHP on Oracle Linux 8 via AppStream ModulesApplies to: Oracle Cloud Infrastructure Linux x86-64 Goal: Explain Installing PHP on Oracle Linux 8 via AppStream Modules SOLUTION Oracle Linux 8 introduces the concept …
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OCI - How To Configure Ubuntu Instances to Display GRUB MenuApplies to: Oracle Cloud Infrastructure Ubuntu Goal: When connected via serial console – in both SSH, VNC, and OCI CloudShell options – the GRUB2 boot loader menu is not…
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OCI: Paravirtualized Instance Created from Custom Image Failed to Boot With ErrorOCI: Paravirtualized Instance Created from Custom Image Failed to Boot With Error "dracut-initqueue timeout - starting timeout scripts" or Struck at "random: nonblocking…
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OCI : How to Verify the Status of the Cloud Agent OSMS Plugin in Oracle Linux Instances?APPLIES TO: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 GOAL: How to verify the status of the Cloud Agent OSMS Plugin in Oracle Linux instances? SOL… -
OCI - How To Enable Root User SSH-keys in OCI Oracle Linux Custom ImagesApplies to: Oracle Cloud Infrastructure Linux x86-64 Goal: The process of creating an OCI instance based on a Platform image, or a custom image based on a Platform image…
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OCI: Unable to Mount NFS Share from FSS with NFSv4 Option "mount.nfs4: Protocol not supported"Applies to: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 SYMPTOMS On OCI Linux Instance unable to mount NFS share from FSS(File Storage Service) usin…
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Oracle Retail SIM support on OEL 7 or aboveSummary: IHAC whose currently running Oracle Retail SIM 13 version at on-premise and planning to migrate to OCI and would like to know the possible versions that can run… -
OCI - How To Create a Yum Channel Entry for Oracle Linux 6 Extended Support (ELS)Applies to: Oracle Cloud Infrastructure Goal: To create a yum config entry for Oracle Linux 6 Extended Support (ELS) on Oracle OCI Solution: NOTE: This configuration is …
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OCI : How to Manually Generate a Memory Dump/Crashdump of an Unresponsive/Hung OCI instanceApplies to: Oracle Cloud Infrastructure Linux x86-64 Oracle Linux Cloud Service Goal How to generate a memory dump/Crashdump of an unresponsive/hung OCI instance A diagn…
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Yum Update with "Connection Timed out after 30001 milliseconds" Error in Oracle Cloud InfrastructureApplies to: Oracle Cloud Infrastructure Linux x86-64 on Oracle Public Cloud Symptoms: When trying to download and install packages, the below errors occur: --snip-- # yu…
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OCI - How To Set Up a Local Yum Repository For Instances In Private NetworksApplies to: Oracle Cloud Infrastructure Goal: Steps for setting up local yum repository accessible within the OCI environment for instances in a private network. Solutio…
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iSCSI Error Messages on OCI Instance "kernel: connection1:0: detected conn error (1020)"APPLIES TO: Oracle Cloud Infrastructure - Version N/A to N/A [Release 1.0] Linux OS - Version Oracle Linux 6.10 to Oracle Linux 7.9 with Unbreakable Enterprise Kernel [5…
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How to Check/Modify MTU Value on OCI Instances to Avoid Connection Time Outs from On-PremisesAPPLIES TO: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 6.0 to Oracle Linux 7.6 with Unbreakable Enterprise Kernel [4.14.35] [Rel…