Clear it in 3 steps
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Start the environment
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Investigate the target
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Submit the flag
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Linux-Custom. Inspecting a Scheduled Backup Script
Mission
Inspect the scheduled script placed under /usr/local/bin along with the cron entry that registers it. Comments inside the script itself can hide clues.
Hints
Hint 1 Show
Explore /etc/cron.d/ and /usr/local/bin/
Hint 2 Show
You can cat a script file including its comment lines
Hint 3 Show
crontab -l -u <user> shows another user's crontab too