Shell Script Jobs

For the last decade a Debian machine on our vessel has been flawlessly running a set of Perl scripts that squash outgoing mail, hand it to an Iridium modem and deliver it to my shore-side mail server. Incoming messages follow the reverse path. Suddenly nothing moves in either direction. Here is what I already know and have ruled out: • The Iridium link itself passes its own internal tests. • DNS on the ship resolves the server name correctly. • Both the shipboard PC and the land-based server have been rebooted. • No recent configuration changes were made. • A Kerio Connect firewall sits in front of the mail server. Given that, I suspect the mail server is at fault, but I am not yet sure whether it still exchanges mail with any source other than the ...

I need a fully scripted, repeatable way to deploy WireGuard on Linux and bind it to my existing LDAP directory for user authentication. Everything should be handled through a single Bash script: installation, key generation, service configuration, firewall tweaks, and the LDAP-backed access control logic. The environment is purely Linux; I’ll run the script on fresh servers spun up from time to time, so hard-coding a specific distribution won’t work. Please detect the distro at runtime (e.g., `cat /etc/os-release`) and branch gracefully for the usual package managers (apt, dnf, yum). Because the LDAP flavour can vary between sites, keep the LDAP integration parameters (host, base DN, bind DN, TLS choice, etc.) externalised in a simple config file that the same script consumes...

I need to reproduce on Ubuntu what I currently run on Windows Server: every user connects through Apache Guacamole, is placed into a fresh, completely isolated Chromium session, and can work alongside other users on the same host without any crossover. Files the user downloads inside that browser must still be intercepted and forwarded automatically to my backend service—exactly the way it works now. Key details you should be comfortable with: • Platform: Ubuntu will be the base OS. • Access method: users will come in through a remote desktop client exposed by Guacamole, not a browser-based VNC or an SSH workflow. • Browser: stock Chromium only; no custom extensions are required at this stage. Behind the scenes I’m open to whichever mix of Linux namespaces...

I’m organising a practical training block for a small group of intermediate-level engineers who work on Linux every day. They already know the very basics of Git, but they need to become confident with real-world workflows and a full CI/CD pipeline. The sessions must be fully hands-on: screen-sharing, live commands, quick coding exercises and immediate feedback rather than slide decks. We’ll spin up our own repos and pipelines so everyone leaves with muscle memory, not just notes. Core topics I want you to cover • Version control in GitHub: project setup, protected branches, pull-request etiquette • GitLab CI/CD: pipeline creation, runner configuration, environment variables, artefact handling • Git fundamentals in depth: merge vs rebase, pull/commit logi...