Comptia Linux +, Ch. 14

monitoring

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

False

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

Lock the server in a server closet, Ensure that SELinux or AppArmor is used to protect key services

What are best practices for securing a local Linux server? (Choose all that apply.)

INPUT

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

Take 50 swap statistics every 3 seconds

What will the command sar -W 3 50 do?

tripwire, AIDE

Which of the following Linux Intrusion Detection Systems can be used to detect altered files and directories? (Choose all that apply.)

On-screen keyboard, High contrast, ​Sticky keys, ​Mouse keys

Which of the following are common assistive technologies? (Choose all that apply.)

​sar, ​free, ​vmstat

Which of the following commands can be used to display memory statistics? (Choose all that apply.)

sa19

Which of the following files is likely to be found in the /var/log/sa directory on a Fedora 20 system over time?

Ensure that only necessary services are running

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

nmap

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

Delegate responsibility

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

False

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

ulimit

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

firewall-cmd --add-service ssh --permanent

Which of the following firewalld commands can be used to allow incoming SSH connections the next time the system is booted?

True

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

ldd

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

/etc/sudoers

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

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

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

False

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