You want to copy all files and folders from project/ to backup/, but only if the files in backup/ are older than those in project/. Which command achieves this?

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Linux CLI - File and Directory Operations

You want to copy all files and folders from project/ to backup/, but only if the files in backup/ are older than those in project/. Which command achieves this?

Acp -ru project/ backup/

Bcp -r project/ backup/

Ccp -rf project/ backup/

Dcp -ri project/ backup/

Step-by-Step Solution

Solution:

Step 1: Understand the options
-r copies directories recursively, -u copies only when source is newer than destination, -f forces overwrite, -i prompts before overwrite.
Step 2: Choose the correct combination
To copy directories and update only newer files, use -ru. This copies recursively and updates only if source is newer.
Final Answer:
cp -ru project/ backup/ -> Option A
Quick Check:
Use -ru to copy recursively and update only newer files [OK]

Quick Trick: Use -ru to copy folders and update only newer files [OK]

Common Mistakes:

Using -r alone copies all files regardless of age
Using -f overwrites without checking timestamps
Using -i prompts but doesn't check file age

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You want to copy all files and folders from project/ to backup/, but only if the files in backup/ are older than those in project/. Which command achieves this?

Step 1: Understand the options

Step 2: Choose the correct combination

Final Answer:

Quick Check:

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