Linux - Chapter 14 Review

Which file contains information regarding the users, computers, and commands used by the sudo command?

/etc/sudoers

Which the following linux intrusion detection systems can be used to detect altered files and directories?

AIDE tripwire

Which of the following steps is not a common troubleshooting procedure?

Delegate responsibility

Which of the following actions should you first take to secure your linux computer against network attacks?

Ensure that only necessary services are running

The lspci can be used to isolate problems with X Windows. True or False?

False

When the fsck command cannot repair a nonroot filesystem, you should immediately restore all data from tape backup.

False

What type of netfilter/iptables chain targets traffic that is destined for the local computer?

Input

What are the best practices for securing a local limit server?

Lock the server in a server closet set a BIOS password on the server

Which of the following are common assistive technologies?

Mouse Keys Sticky Keys On-Screen Keyboard

What will the command sar -W3 50 do?

Take 3 swap statistics every 50 seconds

RSA is a common symmetric encryption algorithm used by SSH and GPG. True or False?

True

The private key is used when creating a digital signature. True or False?

True

When performing a sar -u command, you notice that %idle is consistently 10%; is this good or bad?

bad, because the processor is idle 10 percent of the time and perhaps a faster CPU is required

Which of the following commands can be used to display memory statistics?

free sar vmstat

Which command indicates the shared libraries required by a certain executable program?

ldd

On which part of the maintenance cycle do Linux administrators spend the most time?

monitoring

Which of the following commands can be used to scan the available ports on computers within your organization?

nmap

Which of the following files is likely to be found in the /var/log/sa directory over time?

sa19

Which command can increase the number of files handles that programs can open in a shell?

ulimit