What command did Joselyn execute to extract the login history and system boot time?

What command did Joselyn execute to extract the login history and system boot time?

• A. last -f /var/log/wtmp
• B. who -a
• C. lastlog
• D. cat /var/run/utmp

Answer: (A)

The command executed by Joselyn to extract the login history and system boot time is the one that reads specific log files relating to user sessions. The command "last -f /var/log/wtmp" accesses the `wtmp` file, which maintains a historical record of all logins and logouts in the system, as well as system reboots. By using this command, Joselyn would retrieve a detailed account of user logins and the times the system was booted up, providing comprehensive insight into the system's usage patterns. This command is particularly useful for system administrators and forensic investigators as it allows them to track user activity and identify any unauthorized access attempts. The other options either display current user session information or other user-related data but do not specifically cater to extracting the history of logins or boot times in the way that the command does.

The command executed by Joselyn to extract the login history and system boot time is the one that reads specific log files relating to user sessions. The command "last -f /var/log/wtmp" accesses the wtmp file, which maintains a historical record of all logins and logouts in the system, as well as system reboots. By using this command, Joselyn would retrieve a detailed account of user logins and the times the system was booted up, providing comprehensive insight into the system's usage patterns.

This command is particularly useful for system administrators and forensic investigators as it allows them to track user activity and identify any unauthorized access attempts. The other options either display current user session information or other user-related data but do not specifically cater to extracting the history of logins or boot times in the way that the command does.