Ch. 14 Questions
8.) Which of the following steps is not a common troubleshooting procedure?
C. Delegate responsibility
15.) Which of the following commands can be used to scan the available ports on computers within your organization?
C. nmap
12.) The private key is used when creating a digital signature. True or False?
TRUE
2.) Which of the following files is likely to be found in the /var/log/sa directory n a Fedora 20 system over time?
C. sa19
16.) Which of the following are common assistive technologies (Choose all that apply.)
a. mouse keys c. sticky keys d. on-screen keyboard
17.) Which of the following Linux Intrusion Detection Systems can be used to detect altered files and directories? (choose all that apply)
A. Aide D. snort
7.) What type of iptables chain targets traffic that is destined for the local computer?
A. INPUT
4.) Which of the following commands can be used to display memory statistics? (Choose all that apply)
A. free B. sar c. vstat
20.) What are best practices for securing a Linux server? (choose all that apply.)
A. lock the server in a server closet D. set the default run level to 1 (single user mode) C. Ensure that SELInux or AppArmor is used to protect key services
1.) On which part of the maintenance cycle do Linux administrators spend the most time?
A. monitoring
14.) What will the command sar -W 3 50 do?
B. Take 50 swap statistics every 3 seconds
13.) Which of the following actions should you first take to secure your Linux computer against network attacks?
B. ensure that only necessary services are running
5.) Which command indicates the shared libraries required by a certain executable program?
B. ldd
10.) Which file contains information regarding the users, computers and commands used by the sudo command?
D. /etc/sudoers
19.) When performing a sar -u command, you notice that %idle is consistently 10 percent. Is this good or bad?
D. bad because the processor is idol 10 percent of the time and perhaps a new hard disk is required
9.) Which of the following firewlld commands can be used to allow incoming SSH connections the next time the system is booted?
D. firewall -cmd ---add-service ssh --permanent
18.) When the fsck command cannot repair a nonroot filesystem, you should immeidateley restore all data from tape backup. True or False?
FALSE
3.) The lspci command can be used to isolate problems with X Windows. True or False?
FALSE
6.) RSA is a common symmetric encryption algorithm used by SSH and GPG True or False?
FALSE
11.) Which command can increase the number of files handles that programs can open in a shell?
b. ulmit