Linux CLI - Archiving and Compression
Which command creates an xz compressed archive of the
logs directory including only files modified within the last 7 days?Which command creates an xz compressed archive of the logs directory including only files modified within the last 7 days?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the requirement
Create an xz compressed archive including only files modified in last 7 days.Step 2: Analyze options
find logs -mtime -7 -print0 | tar --null -T - -cJf logs.tar.xz usesfindwith-mtime -7to select files modified within 7 days, then passes them totarwith--nulland-T -to read null-separated filenames.Step 3: Why others are incorrect
tar -cJf logs.tar.xz --newer-mtime='7 days ago' logs uses--newer-mtimewhich is not a standard tar option. tar -cJf logs.tar.xz logs --exclude='*' --include='*7days*' uses invalid--includeand--excludepatterns. find logs -mtime +7 | tar -cJf logs.tar.xz -T - finds files modified more than 7 days ago, opposite of requirement.Final Answer:
find logs -mtime -7 -print0 | tar --null -T - -cJf logs.tar.xz -> Option AQuick Check:
Use find with -mtime and tar with --null -T - [OK]
Quick Trick: Use find -mtime -7 with tar --null -T - for selective archiving [OK]
Common Mistakes:
- Using incorrect tar options like --newer-mtime
- Confusing -mtime +7 with -mtime -7
- Trying to filter files inside tar without external find
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