Introduction
If you use a Mac for development but deploy on Linux servers, you might have encountered issues when extracting tar.gz files created on macOS. This article explains why these errors occur and how to avoid them with practical and effective solutions.
Creating Tar Files on macOS
On macOS, creating a tar.gz file is straightforward. For instance, to compress a directory named pix, you would use the following command:
``bash tar -cvzf pix.tar.gz pix ``
Then, transfer this file to a Linux server via SCP:
``bash scp pix.tar.gz [email protected]:/tmp/ ``
Issues When Extracting on Linux
When you attempt to extract this file on a Linux server, error messages might appear:
``bash cd /tmp tar -xzvf pix.tar.gz ``
Common Errors
You often see errors like:
tar: Ignoring unknown extended header keyword 'LIBARCHIVE.xattr.com.apple.quarantine'
These errors are due to macOS-specific metadata that are included by default in tar files.
Why Do These Errors Occur?
macOS uses the HFS+ or APFS file systems, which store additional metadata in files. When creating a tar file, these metadata are included, but they are not recognized by Linux systems.
Solutions to Prevent Errors
Solution 1: Use the --no-xattrs Option
A simple solution is to use the --no-xattrs option when creating the tar file to exclude these metadata:
``bash tar --no-xattrs -cvzf pix.tar.gz pix ``
Solution 2: Use the --disable-copyfile Option
Another option is to add --disable-copyfile to prevent copying the ._ files:
``bash tar --disable-copyfile -cvzf pix.tar.gz pix ``
Solution 3: Use gnu-tar
Installing and using gnu-tar instead of bsdtar on macOS can also solve these issues as it handles metadata better:
``bash brew install gnu-tar gtar -cvzf pix.tar.gz pix ``
Conclusion
By knowing these solutions, you can avoid errors when extracting tar files created on macOS on Linux systems. These simple adjustments ensure a seamless deployment.
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