Oracle Linux
Discussion List
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How to reset a forgotten root password from Serial Console of Oracle Linux instance in OCIApplies to: Oracle Cloud Infrastructure - Version N/A to N/A [Release 1.0] Information in this document applies to any platform. Goal If you can't SSH to Oracle Linux In… -
Still Cannot Connect to Ports XXXX Even After Adding to VCN Security Rules and IPTables RulesApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux x86-64 Symptoms: Connections to certain ports still fail even when they are allowed in VCN security…
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OCI: How to configure a secondary VNICs in OL7 Instance via oci-network-configApplies to: Oracle Cloud Infrastructure - Version N/A and later Information in this document applies to any platform. Goal This article illustrates how to use OCI utili…
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How to Change MTU SizeApplies To: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 6.0 and later Linux x86-64 Goal: This document details steps to change MT…
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Set up Secure VNC server in OCI Compute instancesApplies to: Oracle Cloud Infrastructure - Version N/A and later Information in this document applies to any platform. Goal Set up Secure VNC server in RHEL /Oracle Linux…
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Permission denied (public key) during SSH login with opc userApplies to: Oracle Linux Cloud Service - Version Oracle Linux 6.0 and later Oracle Cloud Infrastructure Linux x86-64 Symptoms User gets a permission denied (public key) …
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Boot Failed with Error: Warning: /dev/<VG>/root does not existApplies to: Oracle Cloud Infrastructure - Version N/A and later Linux OS - Version Oracle Linux 7.0 and later Oracle Compute Cloud Service - Version N/A and later Inform…
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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… -
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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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 …
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How to Enable X11 Forwarding Over SSH on Oracle Linux 6 and 7The following instructions demonstrate how to enable X11 forwarding over SSH on systems running Oracle Linux 6 and 7, to display an X11 window on a different server. To …
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Does Oracle Linux Include Anti-Virus Software As Part Of Its Distribution?Some Operating Systems (OS) include their own anti-virus software as part of the OS distribution. However many Linux distributions, including Oracle Linux, do not includ…
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Installing And Running Oracle Ksplice in Oracle CloudThe uptrack tools necessary to run Oracle Ksplice in Oracle Cloud are included in the base image of Oracle Linux instances. These tools have names that start with 'uptra…
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How to Boot Oracle Linux 7 (OL7) Into Rescue And Emergency Modes Via 'systemd'In OL7, both rescue mode and emergency mode are systemd targets (that replace runlevels of previous OL versions). Note Rescue mode allows the system to be repaired in si…
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How To Install Security Updates On Oracle Linux Using YUMIt is possible to use package management tools such as yum or dnf included in Oracle Linux to only install security updates, rather than applying all available updates t…
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How to Use the YUM Versionlock Plugin to Exclude Specific RPM Packages From Being UpgradedThere are instances where specific versions of an application or driver RPM package may have dependencies on specific kernel versions. In situations like this, you can u…
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How to Connect Through VNC Using the Public IP Address of an Oracle Linux 7 Instance on OCIThis article explains how to configure VNC to connect to an Oracle Linux 7 instance via the instance's public IP address on OCI. 1) Install graphical user interface (GUI…
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How To Collect a Sos ReportA sos report can be collected on systems running Oracle Linux or Red Hat Linux in order to obtain system configuration information and logs. If the sos package, which pr…
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How To Install The Sosreport PackageA sosreport collects diagnostic support data from Oracle Linux or RHEL. To install it, install the sos package. Check to see if the 'sos' package is installed, as it pro…
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How to Bring up Secondary VNICs in an Oracle Cloud Infrastructure(OCI) Oracle Linux 7 InstanceHow to add a secondary VNIC that is persistent through reboots in OL7 using systemd Unit File 1. Use the OCI Web Console to create and attach a secondary VNIC, see: http…
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OCI: How to Use Boot Volumes for Oracle Linux Instance RecoveryApplies to: Oracle Linux Cloud Service - Version Oracle Linux 6.0 and later Oracle Cloud Infrastructure Linux x86-64 Goal If an Oracle Linux instance in OCI is not booti…
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Using Serial Console Connection to Edit Files or Change User Key in OL instancesThis document assumes you have a working serial console connection to your instance and are seeing the login prompt at the serial console terminal. You can use OCI Cloud… -
OSMS Maintenance WindowsLots of services in OCI have maintenance windows. SaaS has them, so does OICS, DBCS and Autonomous too. What I want to do is a apply a maintenance window to each and eve… -
Hanging Connection While Accessing On-Premise CIFS from Oracle Cloud Instance (OCI) Linux InstanceA user is experiencing connections hanging when connecting from OCI to an on-premise file share via a CIFS mount. Trying to access files on the CIFS mount may fail with …
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Logging In to a Linux Host Using SSH Prompts "reverse mapping checking getaddrinfo failed" ErrorWhen trying to log in via ssh from one linux host to a different linux host, the following error occurs: host1 ~]# ssh reverse mapping checking getaddrinfo for host2. […
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Curl Command Returns Error "SSL Certificate Problem: Unable To Get Local Issuer Certificate"SSL Certificates are checked when using applications, such as curl, to connect to web servers. If this check fails, errors such as "unknown CA" and "SSL certificate prob…
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How to Configure a Relay Host in Sendmail "Smart Host" On Oracle Linux 6 and 7Sendmail is a standard Linux OS mail delivery service. A Relay Host can be configured with Sendmail's "Smart Host" option using the following steps: Install the sendmail…
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Yum Update Fails With Error "mdmadm-4.1-8.0.1.el7_9.x86_64: failed to retrieve package"When trying to perform an update on an OCI Instance running Oracle Linux 7, the update fails with the following error: Error downloading packages: mdadm-4.1-8.0.1.el7_9.…
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Using SSH and Client-side Config with Oracle Linux 8The following video explains how to use SSH and Client-side config with Oracle Linux 8: