If you are dealing with a recursive set of files within a data folder, it is often necessary to distinguish between directory and file permissions: Should be 755 ( drwxr-xr-x ). Files: Should be 644 ( -rw-r--r-- ).
Linux permissions are built on three tiers: gecko drwxrxrx
Demystifying "gecko drwxrxrx": Understanding Web Driver Security and Linux File Permissions If you are dealing with a recursive set
This error appears when the geckodriver binary lacks for the user running the test. The solution is to set the correct permissions – typically 755 (rwxr‑xr‑x). The solution is to set the correct permissions
There is also a niche possibility you are looking at a specific repository or script named "Gecko" (perhaps a tool for web scraping or automation) where the user is being instructed to set the directory permissions to 755 (which translates to drwxr-xr-x ) to allow the program to run.
Before we can understand the gecko part, we need to dissect the second half: . This is a fragment of a Unix/Linux file permission string.
If the owner is not correct, change it using chown . For instance, if running under a web server ( www-data ): sudo chown -R www-data:www-data /path/to/gecko-directory Use code with caution.