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Discussion List
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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. [… -
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:
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ASLR is Disabled on an Oracle Linux 7 Cloud InstanceIn standard Oracle Linux 7 OCI instances, ASLR is enabled by default and the corresponding kernel parameter is set to kernel.randomize_va_space = 2 ASLR is a feature of …
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Oracle Linux 7 Cloud Instance Experiences Hangs with Kernel Error "detected conn error (1020)"An Oracle Linux 7 Cloud instance using iSCSI storage, started to experience many OS commands, such as ps or df hanging. The instance logs showed that the iscsid service …
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How to Change MTU Size on Oracle Linux 6 and 7TCP based networks send data in packets via network interfaces. The Maximum Transmission unit (MTU) set on a network device defines the maximum size of a single packet t…