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?Question 18Answera.cat /var/log/secure | tail -10b.head -10 /var/log/securec.tail -10 /var/log/secured.cat /var/log/secure | head -10
Question
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?Question 18Answera.cat /var/log/secure | tail -10b.head -10 /var/log/securec.tail -10 /var/log/secured.cat /var/log/secure | head -10
Solution
The command that can be used to view the last ten successful and failed login attempts in an OpenSSH server on a Linux system is:
c. tail -10 /var/log/secure
Here's why:
The 'tail' command in Linux is used to print the last N lines from the file. The '-10' option tells 'tail' to print the last 10 lines. '/var/log/secure' is the file where OpenSSH server logs all the authentication messages, including successful logins and failed login attempts.
So, 'tail -10 /var/log/secure' will display the last ten lines of the secure log, which should include the last ten successful and failed login attempts.
The other commands either use 'head', which shows the first ten lines instead of the last ten, or use 'cat' which displays the whole file, not just the last ten lines.
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