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Linux Administration

Linux Administration presents a collection of common issues and useful tips for Linux system administration. Whether you’re new to system administration or have been maintaining systems for some time, we hope these tips are helpful regardless of your background or choice in Linux distributions.

Fixing W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.hhvm.com trusty InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY B4112585D386EB94

An error occurred during the signature verification - NO_PUBKEY B4112585D386EB94 - blackMOREOps 2

I was trying to update one of my server that has some HHVM repositories and received this error “W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.hhvm.com trusty InRelease: The following signatures couldn’t be verified …

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Fixing W: GPG error: http://download.opensuse.org Release: The following signatures were invalid: KEYEXPIRED 1501595774 error

Fixing W GPG error http download.opensuse.org Release The following signatures were invalid KEYEXPIRED 1501595774 error - blackMORE Ops - 1

I was trying to update one of my server that has some Opensuse repositories and received this error “W: GPG error: http://download.opensuse.org Release: The following signatures were invalid: KEYEXPIRED 1501595774” root@someserver:~# apt-get update . . . ---SNIP---- Ign http://download.opensuse.org Translation-en Fetched 481 B in 4s (97 B/s) Reading package lists... …

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How to add RBL on Zimbra Server?

How to add RBL check on Zimbra Server - blackMORE Ops - 2

A DNS-based Blackhole List (DNSBL) or Real-time Blackhole List (RBL) is an effort to stop email spamming. It is a “blacklist” of locations on the Internet reputed to send email spam. The locations consist of IP addresses which are most often used to publish the addresses of computers or networks …

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