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Linux
Discussion List
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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… -
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…
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Using port 8008 for HTTP service on Oracle LinuxSummary: I have a Compute instance running Oracle Linux 8.6 server. I use it to run nginx proxying to a couple of web apps on the backend. I have port 80 working. But tr… -
OCI: What is the ocivolume-oled Volume Mounted on /var/oled FilesystemApplies to Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 and later Linux x86-64 Goal Describe the /dev/mapper/ocivolume-oled Vo…
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Root Password for labHi launched the lab for Learning Create users and groups on Oracle Linux Create users and groups on Oracle Linux | Luna Labs | Oracle require root password to create use…
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Attaching a paravirtualized volume with specific device pathSummary: Link: https://docs.oracle.com/en-us/iaas/Content/Block/References/fstaboptionsconsistentdevicepaths.htm#fstab_Options_for_Block_Volumes_Using_Consistent_Device_…
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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…
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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 enable http connectionSummary: I'm trying to enable HTTP connection to my compute instance without success. Content (required): I have enabled port 80 in ufw and added Ingress Rule to securit…
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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… -
Upgrade ubuntu imageSummary: upgrade ubuntu Content (required): Version (include the version you are using, if applicable): Code Snippet (add any code snippets that support your topic, if a… -
Oracle Linux 8 grub error "kernel too small"Summary: OCI instance running OL8 with dnf-automatic configured to auto-upgrade the packages. Woke up one morning recently to find the instance not contactable. Cloud co… -
VNCServer Session Is Not Started on Oracle Linux InstanceAttempting to start a VNCServer session on an instance running Oracle Linux 7 or higher fails with either 'Internal error: Could not resolve keysym' or 'XIO: fatal IO er…
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PRESERVE_HOSTINFO=2 in /etc/oci-hostname.conf Does Not Stop /etc/resolv.conf From Being OverwrittenAn Oracle Linux instance has its /etc/resolv.conf files overwritten whenever it is rebooted or whenever its DHCP lease is renewed. In line with Oracle Cloud Infrastructu…
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The Root Filesystem Turns Read-only With I/O errors On An OCI Instance Running Ubuntu 18.04An Oracle Cloud Infrastructure (OCI) Instance running Ubuntu 18.04 as its operating system experiences its root filesystem turning read-only with I/O errors. The root fi…
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Unable to Repair XFS Filesystem Using XFS RepairTo fix this error, run these commands: 1) Attempt to mount the partition to replay the log. Back up any important data on the partition if the attempted mount is possibl…
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SSH Session Disconnects After a Few Minutes of Inactivity When Using MobaXterm ClientUsers using the MobaXterm client can experience SSH connections automatically disconnecting due to inactivity. Enabling the SSH keepalive and Fix Connection issues in th…
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SSH Fails with error "Authentication Refused: Bad Ownership Or Modes For Directory /home/****"SSH connections to a linux instance fail for a user with "authentication refused: bad ownership or modes for directory" errors. This is caused by incorrect permissions b…
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SSH Login Stuck At : "debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP"SSH connections hang, and errors such as SSH2_MSG_KEX_DH_GEX_GROUP or SSH2_MSG_KEX_ECDH_REPLY are seen in verbose logging output or in /var/log/messages. When trying to …