Test your basic knowledge |

Linux Administration

Subject : it-skills

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Check IP Addresses of active interfaces
/sbin
apropos
ifconfig
du

2. BGP
sudo
179
80
head

3. Libraries essential for the binaries in /bin/ and /sbin/
head
143
/lib
dig

4. Parses for string
grep
cat {filename}
161
mkdir

5. Host-specific system-wide configuration files
23
/etc
/bin
kill

6. Prints network connections - routing tables - interface stats - masq connections and multicast relationships
cat {filename}
161
usermod
netstat

7. Does a DNS lookup or reverse dns lookup
ifconfig
uptime
grep '{pattern}' {file}
host

8. Creates a group for users
netstat -r
21
groupadd
ls

9. Secondary hierarchy for read-only user data
/usr
20
chown
host

10. HTTPS
host
grep '{pattern}' {file}
443
/mnt

11. SSH
groupadd
22
uptime
25

12. Downloads a file from the internet
wget
cat
rm
killall

13. Displays all file space usage
443
/bin
du -a
nslookup

14. Displays Kernel information
uname -a
netstat -r
file
/media

15. Prints current working directory
pwd
cat > {filename}
110
page {filename}

16. Displays all current running processes (similar to task manager)
host
pwd
top
25

17. SFTP
kill
115
date
wget

18. Changes ownership of a file or directory
20
groupadd
touch
chown

19. Find regular expression in file.

20. Configuration for optional installed software
118
/proc
443
/opt

21. Changes group ownership of file or directory
mkdir
chgrp
grep '{pattern}' {file}
chown

22. Copies a file
netstat -i
kill
cp
curl

23. Displays the 10 top lines of a file
head
161
groupadd
cp

24. Lists all stopped/paused background. Resumes a stopped job
143
110
bg
apropos

25. Displays system uptime
date
uptime
/home
wget

26. View a text file - View file but it scrolls.
179
dig-x
mv
cat {filename}

27. Displays calendar
43
464
cal
ifup

28. Brings an interface up
rm
apropos
43
ifup

29. Mount points for removable media such as CD-ROMs
less {filename}
page {filename}
nslookup
/media

30. Essential command binaries that need to be available in single user mode; for all users - e.g. - cat - ls - cp.
/opt
/bin
mv
cat

31. POP3
118
ifconfig -a
110
cat {filename} | more

32. Lists all files within a directory (including hidden)
top
53
ls -a
df

33. Brings and interface down
ifdown
443
cat {filename} | more
host

34. IMAP
mail
80
kill
143

35. User root's home directory
/var
ps
/root
usermod

36. Prints file information
stat
history
ls
161

37. Displays the connection media state and capabilities
cat > {filename}
ethtool
23
/root

38. Search for all Unix commands that match keyword - e.g apropos file.
du -a
/boot
apropos
43

39. View a text file - View file one screen at a time
/tmp
rm
pico {filename}
more {filename}

40. Reverse dns lookup
43
usermod
cat {filename}
dig-x

41. View a text file - Very handy with ncftp.
page {filename}
tail
cd
man

42. Adds existing user to a group
443
ifconfig -a
killall
usermod

43. Changes directories
/opt
/proc
23
cd

44. ____ is found at: cd /var/mail then vi into each mail (administrator - www-data - nagios etc.)
mail
wget
rm
143

45. Shows command history
ls -a
history
cat {filename}
sudo

46. Displays user information
bg
ifdown
finger
ifup

47. Ftp Data
20
stat
top
rm

48. Displays manual or help document for a command/application
43
pwd
man
netstat -i

49. View a text file - Like more - with extra features
ping
ifconfig
/bin
less {filename}

50. Displays the 10 bottom lines of a file
sudo
tail
dig-x
rmdir