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Showing posts with the label Linux

[fixed] "Evolution is currently offline due to a network outage."

Evolution is currently offline due to a network outage. Evolution will return to online mode once a network connection is established. If you have this error when updating your system (for example, from Ubuntu 14 to Ubuntu 16), the solution is to run Evolution with this command: evolution --force-online That is usually related to a combination of evolution, dbus, and NetworkManager. With all three installed the idea was that NM would say whether it had a working network or not over dbus. Tools like evolution would ask on dbus about the state of the network and switch to online or offline as networks were hotplugged. This breaks down when the network isn't managed by NM but NM is still running. Such as when /etc/network/interfaces is configured to use ifupdown instead. If NM is running then it won't have any networks under its control and it fails to recognize that the system does actually have a network running outside of its control. It will respond to evolution ...

This Linux flaw could open you up to attack

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Download PDF A flaw in the Linux kernel lets hackers inject malware into downloads and webpages, smash Tor connections, launch denial-of-service attacks, and more. This sounds pretty serious. It sounds like if either side of a connection is affected by this bug, and an attacker knows both sides' IPs, then they can quickly confirm that a connection exists and insert whatever data they want into the middle of the connection. They can't read data sent between the two parties, though. Where this is most worrying to me is system updates. On Linux, it's unfortunately fairly common for updates to be automatically delivered over HTTP and then not checked in a secure way. For example, Gentoo by default downloads packages insecurely, and on yum-based systems, even though the stock configuration is often secure, it's common to add insecure repos (for example, the official nginx repo is by default insecure). If your system downloads updates insecurely, then an attacker can ma...
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