Linux Administration

It’s been almost 3 years I’m with Azure and to be honest I never had any issues. However, I found something interesting happening recently. Everytime my server was hit by high traffic volume (either a post went somwhat viral for some unknown reason – I mean come on, my posts …

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 …

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... …

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 …

Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with …