Which Linux troubleshooting file keeps track of any users entering or exiting the system?
a. lastlog
b. Messages
c. Secure
d. Spooler
c. Secure
Explanation: The troubleshooting files are as follows:
• Secure: Keeps track of any users entering or exiting the system and keeps track of security violations such as unauthorized users attempting to log in.
• Lastlog: Keeps track of user login; requires the use of the last command to display its contents.
• Messages: Contains most of the system messages that report any software or hardware errors. This is an important troubleshooting file.
• Spooler: File for mail management.
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