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
443
/bin
25
ifconfig

2. Host-specific system-wide configuration files
ifup
161
dig-x
/etc

3. Prints current working directory
pwd
ifdown
ls -a
/lib

4. Creates a directory
/lib
man
mkdir
sudo

5. Reports a snapshot of the current processes
/tmp
/root
chgrp
ps

6. Report file system disk space usage
du
df
tail
/root

7. Users' home directories - containing saved files - personal settings - etc
ifup
ls -a
netstat
/home

8. Contains Boot loader files - e.g. - kernels - initrd; often a separate partition
/var/log
/usr
/boot
21

9. Displays system uptime
top
pico {filename}
uptime
cat

10. Brings and interface down
mail
118
21
ifdown

11. Shows who is currently logged in and where
w
ls -a
file
dig-x

12. Displays all current running processes (similar to task manager)
curl
cat
page {filename}
top

13. Copies a file
stat
/home
usermod
cp

14. Find regular expression in file.

15. Adds existing user to a group
date
cp
usermod
du -a

16. Displays all file space usage
du -a
cat {filename}
netstat -r
mkdir

17. Search for all Unix commands that match keyword - e.g apropos file.
apropos
464
mail
pwd

18. SFTP
115
du -a
443
pwd

19. WHOIS
23
20
sudo
43

20. dns lookup
ps
/dev
/var/log
dig

21. Displays calendar
cal
du
kill
nslookup

22. Secondary hierarchy for read-only user data
tail
/usr
du
chown

23. Moves a file with the option of renaming it
chown
touch
mv
156

24. Telnet
du
161
ifup
23

25. Test network connectivity
service
ping
pwd
rm

26. SSH
22
43
ps
53

27. Kerberos password
killall
/tmp
df
464

28. Variable files—files whose content is expected to continually change during normal operation of the system—such as logs & spool files & and temporary e-mail files.
du
grep '{pattern}' {file}
kill
/var

29. Brings the most recent job to the foreground
touch
page {filename}
nslookup
fg

30. View a text file - View file but it scrolls.
cat {filename}
du
'/'
kill

31. HTTP
ifdown
chgrp
touch
80

32. View a text file - View file one screen at a time
apropos
dig
cat {filename} | more
uname -a

33. Configuration for optional installed software
touch
ifdown
22
/opt

34. Temporarily mounted filesystems
ifconfig
history
/mnt
43

35. View a text file - View file one screen at a time
more {filename}
156
cd
host

36. Creates a group for users
cat > {filename}
groupadd
179
dig-x

37. ____ is found at: cd /var/mail then vi into each mail (administrator - www-data - nagios etc.)
service
mail
cd
ethtool

38. Prints file information
date
sudo
stat
grep

39. Prints network connections - routing tables - interface stats - masq connections and multicast relationships
netstat
143
man
less {filename}

40. Displays the connection media state and capabilities
grep
host
ethtool
118

41. SMTP
25
110
/usr
179

42. HTTPS
du
finger
443
groupadd

43. SNMP
head
cat
161
netstat -i

44. List files within a directory
cat
w
/var/log
ls

45. Parses for string
passwd
du
grep
head

46. Estimate file space usage
kill
wget
du
/usr

47. Virtual filesystem documenting kernel and process status as text files - e.g. uptime or network. In Linux it corresponds to a Procfs mount
/proc
/opt
53
pwd

48. BGP
179
/media
dig-x
groupadd

49. DNS
ifconfig -a
history
115
53

50. View a text file - Very handy with ncftp.
wget
143
page {filename}
cat > {filename}