Linux Administration

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. WHOIS
history
115
43
cat {filename} | more


2. SSH
file
464
22
netstat -r


3. Temporary files cleaned on reboot
more {filename}
/tmp
wget
uname -a


4. Display all interfaces
ifconfig -a
bg
/etc
man


5. Prints current working directory
21
/root
fg
pwd


6. Virtual filesystem documenting kernel and process status as text files - e.g. uptime or network. In Linux it corresponds to a Procfs mount
/proc
mkdir
history
ethtool


7. Brings an interface up
curl
/opt
23
ifup


8. Changes ownership of a file or directory
head
usermod
chown
finger


9. Adds existing user to a group
killall
passwd
ifdown
usermod


10. Check IP Addresses of active interfaces
kill
ifconfig
21
25


11. Create a text file: Enter your text (multiple lines with enter are ok) and press control-d to save.
cat > {filename}
top
/usr
uptime


12. Configuration for optional installed software
/opt
uname -a
80
kill


13. Displays calendar
cat {filename}
/var/log
ls -a
cal


14. Does a DNS lookup or reverse dns lookup
mail
host
file
20


15. Displays manual or help document for a command/application
ifconfig -a
head
service
man


16. Removes a directory
rmdir
ps
/usr
cal


17. 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.
pico {filename}
/var
apropos
/etc


18. Log files
/tmp
ifdown
/var/log
cat {filename}


19. Brings and interface down
mkdir
df
man
ifdown


20. Root directory of file system (not the user root's home dir)
'/'


21. Kills all processes by name
/mnt
page {filename}
killall
nslookup


22. Prints file type
cat > {filename}
143
file
host


23. dns lookup
sudo
464
pwd
dig


24. Secondary hierarchy for read-only user data
118
/usr
usermod
service


25. Telnet
cat
tail
23
netstat


26. List files within a directory
page {filename}
dig-x
/etc
ls


27. View a text file - Very handy with ncftp.
/boot
date
more {filename}
page {filename}


28. Lists all stopped/paused background. Resumes a stopped job
/lib
bg
tail
ifconfig -a


29. Prints file information
stat
/tmp
chown
443


30. IMAP
/etc
143
/mnt
mkdir


31. SFTP
/usr
chgrp
115
ethtool


32. Shows command history
history
/var/log
chgrp
stat


33. SMTP
25
nslookup
23
ping


34. Changes password for a user
passwd
cat {filename}
mv
ls -a


35. Displays kernel routing tables
ping
netstat -i
netstat -r
usermod


36. Displays system uptime
chown
uptime
ifup
grep


37. Kerberos password
grep
464
/usr
rmdir


38. Displays a table of all network interfaces / errors
/tmp
netstat -i
ifup
/sbin


39. Moves a file with the option of renaming it
curl
mv
killall
wget


40. Host-specific system-wide configuration files
/etc
/root
mail
finger


41. View a text file - View file one screen at a time
top
grep
mkdir
more {filename}


42. Kills a process by pid
161
23
ls
kill


43. Users' home directories - containing saved files - personal settings - etc
/sbin
head
/home
cat


44. BGP
df
/dev
179
groupadd


45. Displays Kernel information
uname -a
cal
fg
43


46. Shows who is currently logged in and where
ifconfig -a
w
fg
history


47. Estimate file space usage
du
161
groupadd
grep '{pattern}' {file}


48. SNMP
w
161
history
179


49. Reverse dns lookup
dig-x
/mnt
stat
ifconfig


50. View a text file - View file but it scrolls.
cat {filename} | more
host
nslookup
cat {filename}