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

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

Task 1. Search for error messages in a log fileIn this task, you must navigate to the /home/analyst/logs directory and report on the error messages in the server_logs.txt file. You’ll do this by using grep to search the file and output only the entries that are for errors.Navigate to the /home/analyst/logs directory.Use grep to filter the server_logs.txt file, and return all lines containing the text string error.Note: If you enter a command incorrectly and it fails to return to the command-line prompt, you can press CTRL+C to stop the process and force the shell to return to the command-line prompt.

Question 5As a security analyst, you are monitoring network traffic and detect a large number of failed login attempts. Which of the following tools would help you investigate this incident? Select two answers.1 pointAn intrusion detection system (IDS)A cryptographic encoderAn antivirus softwareA network protocol analyzer (packet sniffer)

In the Linux file system, under which directory would log files be found?Group of answer choicessbinvarprocdev