Which of the following commands can be used to view the last ten successful and failed login attempts in an OpenSSH server on a Linux system?Select one:a.cat /var/log/secure | tail -10b.cat /var/log/secure | head -10c.tail -10 /var/log/secured.head -10 /var/log/secure

Which of the following commands can be used to search for all successful login attempts in the /var/log/secure file in a CentOS-based Linux distribution?Select one:a.search "Accepted password" /var/log/secureb.find /var/log/secure -name "Accepted password"c.grep "Accepted password" /var/log/secured.locate "Accepted password" /var/log/secure

Which of the following commands can be used to search for all login attempts from a specific IP address in the /var/log/secure file in a CentOS-based Linux distribution?Question 16Answera.locate "sshd.*ip_address" /var/log/secureb.search "sshd.*ip_address" /var/log/securec.find /var/log/secure -name "sshd.*ip_address"d.grep "sshd.*ip_address" /var/log/secure

Question 3 You need to display the last 10 lines of a log file. What command should you use? (Please type only the command itself. Do not type any switches or keywords. Remember, commands do not have spaces in them, and they are case sensitive. Example: ls )

The Linux command that: "Finds out how many users are logged onto the system" is

If you are investigating a breach where an attacker gained shell access to a server, which logs are most likely to contain relevant evidence?Group of answer choicesNginx logsSquid logsauth logs