VBA · SSH · READ-ONLY AUTOMATION
Not every automation needs to change something. Sometimes the most useful improvement is to make a recurring read-only check reliable, repeatable and easy to interpret.
The manual version
A typical remote check can be very simple: connect to a server, move through a few folders, run a listing command and decide whether files are present. The technical operation is easy. The operational weakness is everything around it: remembering paths, repeating the same commands, spotting errors and recording what was found.
When the check becomes part of a daily or monthly process, those small details start to matter.
Why Excel can still be useful
Excel is a practical control surface when the users already work there and the remote operation is narrow. VBA can build the expected paths, launch an SSH client and parse the command output into a table. The workbook then presents the result without asking the user to work in a terminal.
The important part is to keep the boundary clear: the SSH command is read-only, the configuration is explicit and the workbook does not become a hidden administration console.
Turn raw output into states
A directory listing is useful to a technical user. An operational control needs something more explicit. I prefer to translate the result into states such as OK, EMPTY or ERROR while preserving the path, file count and diagnostic message that justify the state.
- Flow type and subfolder.
- Derived remote path.
- Outcome of the command.
- Number of files found.
- Readable diagnostic message.
Configuration is part of the design
Connection details and base paths should not be repeated throughout the code. A small configuration layer makes the tool easier to move and easier to review. It also makes assumptions visible: which server, which port, which base folder and which flow families are expected.
Why read-only matters
Read-only automation reduces the risk of turning a convenience tool into an uncontrolled operational interface. It can still save time, reduce mistakes and improve traceability without introducing write permissions that the task does not need.
A small automation can be valuable even when it never changes the remote system. Consistency is already a feature.