Reactivate old SSH host key types

Problem: ssh rejects connecting to old servers with this error: Discussion: After upgrading your client operating system, the new installed openssh-client disabled some old ssh key types, but you can enable them with command line options or in ssh_config. Solution 1: Add a command line option: Solution 2: Add a line to your config file […]

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DMAR Kernel Log Errors and RAID Controller Crash

Problem: After upgrading an old HP ProLiant DL320 G6 Server to Linux kernel 6.1 (Devuan 5, Debian12) the system crashes during reboot. You will see the following kernel output: These errors are repeated several times, and the RAID controller driver “hpsa” for the SmartArray Controller P212 gives up, causing /dev/sda vanish. Discussion: While not absolutely

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Icon Missing When Adding a Webpage to the Android Homepage

Problem: when adding a shortcut of a webpage to the Android home screen, Chrome used <link rel=”icon” …> to give this shortcut an icon. Lately Google Chrome broke this feature (intentionally probably). Chrome just shows a grey round circle with a single letter instead of the provided icon. Discussion: Google removed it’s claim “don’t be

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Cisco “Smart” License

Problem: after upgrading Cisco ISO XE from 15 to 16 on an ASR-1001-X router, the permanent license of this router changes to “evaluation license” and Cisco forces you to use the call-home “feature”. You will find log entries like these: Discussion: Cisco enforces this call-home feature for newer software releases. There is not much you

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Interface down on Cisco Nexus switch with “dcxNoACKi”

Problem: After an update of a server to Devuan4/Debian11the switch shuts down the interfaces to the server with status “dcxNoACKi” 48 minutes after the reboot. Discussion: the switch is a Cisco Nexus 5000 switch. It implements “Data Center Bridging Capability Exchange (DCBX)”. The server is a Dell server with X710 Controller 10GbE with i40e drivers.

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