Problem overview.
The challenge this resource is designed to solve.
Critical files can sometimes be moved, deleted, or corrupted without notice, leading to system failures or unexpected behavior. This script eliminates guesswork by automatically confirming whether a file is present, helping IT Professionals and MSPs catch and fix issues before they escalate.
About this resource.
What it does and how it fits into your workflow.
This script verifies if a file, specified through a Level Script Variable, exists on a Linux system. When the file is present, the script echoes a confirmation message; otherwise, it reports that the file is missing. The straightforward design makes it a reliable building block for your monitoring strategies.
You can configure a script-based monitor in Level to run this check on-demand whenever a particular event occurs, such as critical system actions or scheduled maintenance. Alternatively, you can create an Automation in Level with a schedule trigger to run this script regularly, ensuring continuous oversight of essential files.
#!/bin/bash
# This resource is provided as a convenience for Level users. We cannot
# guarantee it will work in all environments. Please test before deploying
# to your production environment. We welcome contributions to our community
# library
# Level Library
# https://level.io/library/script-linux-monitor-file-exists
# Specify the file path to check for existence
file_path="{{FilePath}}"
# -----------------------------------------------------------------------------
# Check if the file exists
if [ -f "$file_path" ]; then
echo "file exists: $file_path"
else
echo "file not found: $file_path"
fi
Use cases.
Common ways to put this resource to work.
- Checking for critical configuration files
- Ensuring log files are available for compliance
- Monitoring sensitive security files
- Validating user-created scripts or backups
Recommendations.
Practical guidance for a reliable rollout.
- Test in a non-production environment before deploying widely
- Use a script-based monitor in Level to alert if the file is missing
- Configure an Automation in Level to run on a schedule for frequent checks
- Update Script Variables ({{FilePath}}) accurately to avoid false positives
- Check script output to quickly identify “file not found” messages