Red Hat – RHCSA Exam

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1. What is swap?

Swap is the ability to switch between users in one terminal session

Swap is the cache of your Physical Memory (RAM)

Swap space is the area on a hard disk that is part of the Virtual Memory of your machine (Swap+RAM)

Swap is the cache of your HDD

Question 1 of 50

2. What is the action to disable SSH root login?

Set PermitRootLogin no” in /etc/ssh/sshd_config”

Set AllowRootLogin=No” in /etc/ssh/sshd_config”

Set PermitRootLogin=No” in /etc/ssh/sshd.conf”

Set PermitRootLogin no” in /etc/ssh/sshd.conf”

Question 2 of 50

3. If you have accidentally deleted a file using rm command, how can you get that file back?

run the undelete command

Go to the trash bin and recover it

Type the rm -u command

You cannot get the file back

Question 3 of 50

4. Identify the action that ‘rpm -ql nagios’ will perform.

Verify the package nagios

Provide additional info on the package nagios

Install the package nagios

List files in the package nagios

Question 4 of 50

5. How can we to show currently loaded kernel modules?

kernshow

modprobe

modshow

lsmod

Question 5 of 50

6. What is the command to mount the file system to the directory /mnt?

umount ‘file system path’ /mnt

umount /mnt ‘file system path’

mount /mnt ‘file system path’

mount ‘file system path’ /mnt

Question 6 of 50

7. What is the command used to find out what packages are currently installed?

rpm -a

yum list –installed

rpm -q

yum list installed

Question 7 of 50

8. What does the pwd command do?

It prints the path of the current working directory

It asks for the current user’s password, and the prompts for a new password

It launches the power management daemon

It saves the current working directory, so that you can return there with the popd command

Question 8 of 50

9. If you set your /etc/inittab file to have the default init entry to be ‘init:3:default:’, then your system default runlevel is which of the follow?

administrative single-user mode; denies other users access to the system but allows root access to the entire multiuser file system. Startup scripts are not run

full multiuser mode with login to command-line interface; allows remote file sharing with other systems on your network. Also referred to as the text mode state

full multiuser mode that starts up in an X session, initiating a graphical login; allows remote file sharing with other systems on your network

multiuser, without networking (i.e., you don’t have access to network services, like NFS, xinetd, and NIS)

Question 9 of 50

10. What is the command used to create a disk dump in RedHat Linux?

fsck2 /dev/sda /dev/sdb

dump /dev/sda ssh@localhost:/dev/hda

mk4ext /dev/sda /dev/sdb

dd if=/dev/sda of=/dev/sdb

Question 10 of 50

11. What does ‘shutdown -r now’ do?

Requests that the system be halted after it has been brought down

Only sends out the warning messages and disable slogins, does not actually bring the system down

Requests that the system be powered off after it has been brought down in a safe way

Requests that the system be rebooted after it has been brought down in a safe way

Question 11 of 50

12. Which statement is true about the files and directories created inside the /project directory that have 2777 permissions?

All files inside the /project directory will have permissions set to 2644, and the subdirectories will have them set to 2755

All files and directories will have the same group as that of the /project directory

All executables inside the /project directory will run with the effective group ID (EGID) of the group of the /project directory

All files and directories will have the default group set to the primary group of the user who creates them in /project directory

Question 12 of 50

13. To change the ownership of the file “myfile” from “Tim” to “Jim”, _____ is used.

chown myfile tim:jim

chown tim:jim myfile

changeowner jim myfile

chown jim myfile

Question 13 of 50

14. How would you use scp to copy a file ‘test_file’ from your machine to the remote machine ‘test_machine’ to the /tmp directory, using the account ‘test_user’ on the remote machine.

scp test_file test_machine@test_user:/tmp

scp test_file:test_user@test_machine:/tmp

scp test_file test_user@test_machine:/tmp

scp -f test_file -u test_user -m test_machine -d /tmp

Question 14 of 50

15. Identify the most correct way to edit the current user’s crontab.

vi /etc/crontab.conf

vi /etc/cron.d/0hourly

crontab -l

crontab -e

Question 15 of 50

16. Where do the manual (man) pages for all commands reside in the File System Hierarchy (FSH)?

/usr/man/share/locale

/usr/share/info/man

/usr/share/locale/man

/usr/share/man

Question 16 of 50

17. During boot, the init program checks default runlevel from the __________ file.

/etc/initconf

/etc/inittab

/proc/inittab

/proc/initconf

Question 17 of 50

18. What is the ssh command?

It is the secure shell; it is used to restrict actions available to users

It is the secure shell; it is used to connect to remote hosts via an authenticated and encrypted channel

It is the standard shell; it has a restricted set of commands, but those are portable across different Linux distributions

It is the synchronous shell; all commands are performed in real-time

Question 18 of 50

19. Identify the file in which we can configure the IP Address and Netmask for eth0:

cd /etc/sysconfig/network/ in this folder edit ifcfg-eth0

cd /etc/sysconfig/network-scripts/ in this folder edit ifcfg-eth0

cd /var/syscofig/network-scripts/ in this folder edit ifcfg-eth0

cd /rm/syscofig/network-scripts/ in this folder edit ifcfg-eth0

Question 19 of 50

20. What is the command used to query DNS (Internet domain name) servers?

nslookup

dns

lsrouted

dnsquery

Question 20 of 50

21. ________ is used to configure networking via a console GUI.

system-config-network

networking config

network-config

system-config

Question 21 of 50

22. In which file will user-encrypted passwords be stored?

/home/passwd

/etc/shadow

/etc/masterpwd

/etc/encpasswd

Question 22 of 50

23. If umask is 0022, what is the by-default permission of a file?

655

755

777

644

744

Question 23 of 50

24. Consider using the command ‘cd /a/b/c’, then executing ‘cd ..’. What does this last command do?

changes to your home directory

displays the default directory path

changes to the / directory

changes to /a/b directory

Question 24 of 50

25. When creating a new user account, unless otherwise specified, the files from the __________ are automatically copied to the home directory.

/etc/user start

/etc/skel

/etc/default

/usr/skel

Question 25 of 50

26. What action will ‘du -h ~’ perform?

list the size of all files within your $HOME in human-readable form

dump your home directory to /tmp

duplicate the current process

delete your account and home directory

Question 26 of 50

27. What is the default home directory path in Redhat Linux?

/user/home

/usr/home/

/home/user

/var/home

Question 27 of 50

28. ________ is the Linux distro that is derived from RHEL.

Debian

CentOS

Ubuntu

Mint

Question 28 of 50

29. ‘uname’ command is used to __________ .

show the user name

change user name

print system information

nothing

Question 29 of 50

30. On Red Hat Linux and its derivatives, which of the following commands is appropriate to check whether a particular ‘package’ is installed?

pkg

rpm -qa

sys

Question 30 of 50

31. The Linux Kernel was written by whom?

Richard Stallman

Linus Torvalds

Brian Kernighan

Dennis Ritchie

Question 31 of 50

32. _______ is the firewall that is most commonly used on Linux.

ipfw

iptables

ipchains

Question 32 of 50

33. What is used to power down the system?

telinit 0

All are correct

shutdown -h +1

shutdown -h now

Question 33 of 50

34. The “mount -a” command will mount all file systems in the ________ file.

/etc/filesystems

/etc/mtab

/etc/fs.conf

/etc/fstab

Question 34 of 50

35. What is used to disable the ssh service at next boot?

chkconfig sshd off

chkconfig sshd noboot

chkconfig sshd ignore

chkconfig sshd on

Question 35 of 50

36. _____ is added to a command to run it in the background.

Question 36 of 50

37. A normal user sends a print job to the default printer but later finds the print queue is large and decides to cancel the job. What would the user do to perform this task?

The user can know the job number but cannot remove the job as he or her has no permission to use the Iprm command

The user has no permission to view job numbers using the Ipq command and hence cannot delete the job

The user has to list the job using Ipq and remove it using the command Iprm with the job number as the argument

The user has no permission to view job numbers using the jobs command and hence cannot delete the job

Question 37 of 50

38. What is the command used to change to runlevel 3 if you are at runlevel 5?

who -r 3

runlevel 3

init 3

chkconfig 3

Question 38 of 50

39. is used to see the age of a password.

chgrp
passwd
chmod
chage

Question 39 of 50

40. If you are logged in to a regular user account, and it is necessary for you to log in as root and become a superuser, you use which of the following?

chpriv

chown

passwd

Question 40 of 50

41. Can we increase SWAP space without rebooting?

No, you have to boot with a Live CD to do that

Yes, if you create a swap file

No, you have to re-install your system to do that

No, you have to reboot for the new swap to be activated properly

Question 41 of 50

42. What is used to verify in which state (run level) we are currently running?

init

runlevel

chkstate

telinit

Question 42 of 50

43. is the runlevel that halts the system.

Question 43 of 50

44. Identify the true statement regarding the Linux operating system.

It is single-user, single-tasking, and open source

It is multi-user, multi-tasking, and proprietary

It is single-user, multi-tasking, and free

It is multi-user, multi-tasking, and free

Question 44 of 50

45. The main configuration file that GRUB reads when it is loaded is which of the following?

/boot/grub/grub.conf

/usr/bin/gboot.tab

/etc/boot.conf

/etc/boot

Question 45 of 50

46. SSH uses _____ to authenticate remote computers.

public key cryptography

stream cipher

both block and stream ciphers

secret key cryptography

Question 46 of 50

47. ________ is used to delete a directory, recursively searching for files and other directories and deleting them.

rmdir

‘rm -r’

deltree

Question 47 of 50

48. What does GRUB stand for?

Great Ultimate Bootloader

Gum Removal Under Boot

Grand Unified Bootloader

Great Unique Bootloader

Question 48 of 50

49. What is the command used to list the most CPU-intensive processes on your system?

par

top

free

iostat

Question 49 of 50

50. How do you find out memory usage?

vmstat

top

All are correct

free -m

Question 50 of 50

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