Lab Information
The Nautilus DevOps team possesses confidential data on App Server 2 in the Stratos Datacenter. A container named ubuntu_latest is running on the same server.
Copy an encrypted file /tmp/nautilus.txt.gpg from the docker host to the ubuntu_latest container located at /usr/src/. Ensure the file is not modified during this operation.
Lab Solutions
✅ Part 1: Exact KodeKloud Lab Guidelines (Exam-Safe Mode)
🔑 Step 0: Login to Application Server 2
From the jump host:
ssh steve@stapp02
Password:
Am3ric@
📂 Step 1: Copy the file into the container
docker cp /tmp/nautilus.txt.gpg ubuntu_latest:/usr/src/
🔍 Step 2: Verify inside the container (MANDATORY)
docker exec ubuntu_latest ls -l /usr/src/
Expected result
File nautilus.txt.gpg is present in /usr/src/
File name and size match (no modification)
⚠️ Common Lab Mistakes to Avoid
❌ Copying from container to host (wrong direction)
❌ Wrong container name (ubuntu_latest must match exactly)
❌ Wrong destination path
❌ Using scp or rsync instead of docker cp
🧠 Part 2: Simple Step-by-Step Explanation (Beginner Friendly)
🪜 What are we doing?
The encrypted file already exists on the Docker host
We use Docker’s built-in copy command
Docker copies the file byte-for-byte (no changes)
🔍 Command Breakdown
docker cp /tmp/nautilus.txt.gpg ubuntu_latest:/usr/src/
docker cp → copy files between host and container
/tmp/nautilus.txt.gpg → source file on host
ubuntu_latest: → target container
/usr/src/ → destination directory inside container
👉 This preserves the file exactly as-is.
🧠 Exam Memory Hook
docker cp = safe, direct, no modification
Always verify with:
docker exec ls
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