As you might have experienced… using a recent system to connect to a legacy one could be complicated as some insecure protocols have been disabled, with a message like: Unable to negotiate with 192.168.2.82 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss Create an entry like this in your .ssh/config file, so that insecure methods can be used to connect to a specific host: Host 192.168.2.82 HostKeyAlgorithms=+ssh-rsa KexAlgorithms=+diffie-hellman-group1-sha1 PubkeyAcceptedKeyTypes=+ssh-rsa User root or alternatively on the command line:...
Upgrade Debian from buster to bullseye
I had two Raspberry Pi systems running Raspbian and they were failing to find updates for newer packages. As Debian stable was upgraded too, moving from buster to bullseye the packages failed to get the newer ones. Warning Beware as this procedure might upgrade the system but might no render a bootable Raspberry Pi A way to fix it is, to first, change references, if any, to the old codename version by running:...
KMM 1.1 Scale testing
First published at https://cloud.redhat.com/blog/scale-testing-kernel-module-management Introduction Kernel Module Management (KMM) Operator manages, builds, signs and deploys out-of-tree kernel modules and device plugins on OpenShift Container Platform clusters. KMM adds, for the HUB/Spoke scenario, a new ManagedClusterModule which describes an out-of-tree kernel module and its associated device plugin. You can use ManagedClusterModule resources to configure how to load the module, define ModuleLoader images for kernel versions, and include instructions for building and signing modules for specific kernel versions....
Showing calendar events in Telegram
If you’ve a Telegram group, it might be interesting the ability of https://t.me/redken_bot for adding a calendar ical that automates publishing each day the events in the agenda for the day. If you did read Python and iCalendar ICS processing, part of the basis in that article are part of the bot and are easily used: For configuring, only a few simple steps are required: Have a calendar ICS/webcal accessible (for example a public Google Calendar one) Have a Telegram group where we do want to publish the events Add @redken_bot to the group Specify the URL del calendar and the name Let’s see some screenshoots of the process for you to check how easily it can be achieved....
Automating SSH keys loading for Ansible usage
For using Ansible it’s required to have a working set of ssh-keys already deployed. If you get a set of systems that have not been provisioned by you and are missing the SSH keys, having it fixed might take a while if doing it manually. Good news is that you can use a script in expect to cover this part: #!/usr/bin/expect -f # set Variables set password [lrange $argv 0 0] set ipaddr [lrange $argv 1 1] # now connect to remote system spawn ssh-copy-id root@$ipaddr match_max 100000 # Check for initial connection (add key of host) set timeout 5 expect "yes/no" { send -- "yes\r" } # Check for password prmpt set timeout 120 # Look for passwod prompt expect "password:" { send -- "$password\r" } # send blank line (\r) to come back send -- "\n" expect eof This script, when used like:...