I've updated the Notifying users of processes killed by the in-kernel OOM killer page. The code has been updated is now in GitLab.

Notable changes:

• Uses Rsyslog's omprog facility to run the script
• That allows you to pass the configuration file to use as a command line
  argument
• Mail deliver …

These are some very good things to consider when writing shell scripts.

I am not sure about point #1 though. If you are writing a script that would be in a software package you need to consider whether the package should require Bash or not. Some minimal systems only have …

Assumptions:

• You have a remote Linux machine with a VirtualBox VM and you want to access the VM console remotely.
• The remote machine is named "vv000" and is accessible only via SSH.
• The VM is named "jammy"

Procedure:

1. SSH to the remote machine where the VM is located.

2. Cleanly shut …

Updates:

• 2023-05-01: Moved code to GitLab. Corrections to reflect how new version works.
• 2022-09-09: Updated script to add Bcc option.

We've got servers with up to 512GB of RAM. And we've got users who periodically use it all up. Then their process gets killed by the kernel and the user …

We have a server that is used as a gateway SSH server, meaning the server is used to gain access to our research servers and other machines for users who are on an external network.

The SSH gateway server responds on port 22 to internal networks and on another port …

I spent way to much time figuring out this simple problem. In Ansible I wanted to have a top-level dict variable in the inventory that could be overridden by a host-level dict.

Example inventory file:

all:
  vars:
    dict1:
      thing1: stuff
      thing2: more stuff
  children:
    some_machines:
      hosts:
        server-a:
        server-b:
          dict1:
            thing1 …

On Debian/Ubuntu sysetems you can set MAILTO in /etc/environment(nor in /etc/default/cron, nor in systemd unit files with DefaultEnvironment) and have it apply to all of your crontabs. MAILTO(among other Cron "environment" variables) must be set within the crontab itself. This dissapoints.

If there is …