Robbie Cannings

An online space to store my technical observations, learnings and anything which may help me or others in the future.

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    systemd ctrl-alt-del behaviour

    I accidentally discovered a feature introduced in systemd, which overrides the default SIGINT behaviour for the ctrl-alt-del (CAD) keystroke sequence. Previously, an entry in /etc/inittab such as the below would be sufficient to prevent an accidental CAD (e.g. when remotely connected to a console and using CAD to…

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    • linux
    • systemd

    Puppet - Augeas Lens for systemd

    When applying changes to /etc/systemd/system.conf, using the systemd.lns augeas lens, I needed to change the CPU Affinity parameter. using the puppetforge systemd module, I wanted to set YAML to set the line CPUAffinity=0 1 2 3 in /etc/systemd/system.conf I already discovered through…

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    • puppet
    • augeas
    • systemd

    Runlevels and systemd in RedHat / CentOS 7

    Firstly, /etc/inittab is no longer used in redhat. Instead, systemd (the new system and service manager) is used for defining default startup state. RHEL 7 Sysadmin guide explains this really well. I'll summarise the changes with respect to inittab (default run level). To check current default [root@localhost grub.…

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    • centos
    • systemd
    • redhat

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