EC2 — Verify

Progress checklist

• df -h shows the file system mounted at /mnt/s3files
• findmnt confirms the s3files mount type
• Write test passed — file created at /mnt/s3files/test.txt
• Read back confirmed
• Object visible in S3 bucket (confirmed from workstation)

Overview

Run these commands inside the SSM session on the EC2 instance unless the step says otherwise.

1. Check the mount with df. Required

   df -h /mnt/s3files

   Expected output shows a filesystem entry for s3files:

   Filesystem      Size  Used Avail Use% Mounted on
   fs-…:/          8.0E     0  8.0E   0% /mnt/s3files

2. Confirm the mount type with findmnt. Required

   findmnt -T /mnt/s3files

   The FSTYPE column must show s3files.

3. Write a test file. Required

   echo "hello from ec2 $(date -u)" > /mnt/s3files/test.txt
   cat /mnt/s3files/test.txt

   The file should echo back immediately.

4. List the directory contents. Required

   ls -la /mnt/s3files/

5. Exit the SSM session. Required

   exit

6. Confirm the object appears in S3 (from your workstation). Required

   Run on your workstation (not in the SSM session):

   aws s3 ls "s3://${BUCKET}/" --region "$AWS_REGION"

   Note

   S3 Files syncs the file system to S3 asynchronously. The object may take a few seconds to appear in the bucket listing after it is written on the instance.

   The test.txt object should be listed.

Next step

When you are finished, run Teardown to terminate the instance and clean up all resources.