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Filesystem Caveats

Please note that that a mounted Object Storage bucket doesn't always behave like a normal POSIX file system. Depending on how your application is accessing files, you may encounter issues like:

  • no/wrong file system usage statistics
  • sub-par performance
  • unexpected unmounts
  • duplicate writes leading to hidden objects that occupy space but are invisible to S3 API requests

If possible, using other tools like rclone to access Object Storage is recommended.

Using s3fs-fuse you can mount a bucket of your S3 compatible Object Storage as a folder on Linux, macOS and FreeBSD machine.

Please follow the installation instruction like described on s3fs-fuse.

In case of Debian / Ubuntu system please perform following action:

sudo apt install s3fs

Here the way to mount a bucket which is not reboot safe is shown. All you will need is:

  • access_key
  • secret_key
  • Contabo's S3 URL
  • your bucket name
  • folder (mount point) where you want make your bucket contents available

For access_key, secret_key and the S3 URL please check here.


  • access_key = 82046e8110804a43bf29c1ae426a724d
  • secret_key = 82e69bd7a52076c527154297a76c2233
  • S3 URL =
  • bucket name = foo
  • mount point = ${HOME}/foo
# create a settings file with your access_key:secret_key
echo 82046e8110804a43bf29c1ae426a724d:82e69bd7a52076c527154297a76c2233 > ${HOME}/.passwd-s3fs
chmod 600 ${HOME}/.passwd-s3fs
# create mount point
mkdir ${HOME}/foo
# mount bucket foo to ${HOME}/foo
s3fs foo ${HOME}/foo -o passwd_file=${HOME}/.passwd-s3fs -o url= -o use_path_request_style
# access contents
ls -la ${HOME}/foo