Test your basic knowledge |

RHCSA Commands

Subjects : certifications, it-skills, rhcsa

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. FTP package used in RHEL 6
#iptables -L
yum remove firefox4
cat >> some_file << _EOF
vsftpd

2. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
#yum groupinstall "group name"
vncpasswd
/usr/share/doc/initscripts-*/sysconfig.txt
#iptables -I INPUT -p tcp --dport 21 -j Accept

3. Backup a home directory on desktop6 to /tmp on server6
yum search firefox
/etc/ssh/sshd_config
rsync /home root@server6.example.com:/tmp
/var/log/messages

4. Register on the RHN
/var/log/cron
rsync /home/test1.html root@server6.example.com:/var/pub
rhn_register
#virsh list

5. Connect with VNC viewer securely
/etc/sysconfig/network
# renice -10 proc-id
vncviewer -via student@server6 localhost:2
Fully Qualified Domain Name

6. Install with RPM
#rpm -ivh [package name]
cat >> some_file << _EOF
2>&1
/dev

7. Remote file copy /home/test1.html to the /var/pub directory on server6
# renice -10 proc-id
/etc/yum.repos.d/
ip masqu
rsync /home/test1.html root@server6.example.com:/var/pub

8. Search for command in the doc directory
# ls -l /usr/share/doc | grep httpd
ip masqu
/var/log/maillog
/etc/sysconfig/vncservers rpm -ql tigervnc-server

9. Query information files with RPM
# ls -l /usr/share/doc | grep httpd
#rpm -qi [package name]
#virsh list
/etc/sysconfig/iptables

10. RPM package naming
vncviewer -via student@server6 localhost:2
IPtables forward chain
yum provides
name-version-release.architecture.rpm

11. Start a VM
#virsh list
rsync /home/test1.html root@server6.example.com:/var/pub
/var/www/html/
# virsh create /etc/libvert/qemu/vm_file_name.xml

12. Acting as a router with forwarding
MailTo=student@server6.example.com
ip masqu
# star -xattr -H=exustar -c -f=home.star /home/
#yum groupinstall "group name"

13. Grep with ignoring case
vsftpd
#iptables -L
# grep -i
.spec

14. Install a package group with yum
#yum groupinstall "group name"
updating the kernel
tar fzj
vncviewer -via student@server6 localhost:2

15. Primary configuration of ssh
rpm -ql vsftpd
chkconfig vsftpd on
/etc/ssh/sshd_config
ln -s /pub /var/www/html/pub

16. GUI install / uninstall with yum
/etc/yum.repos.d
MailTo=student@server6.example.com
add/remove software GUI
IPtables input chain

17. An example of searching through system logs with interpretation.
add/remove software GUI
$ tar czvf home.tar.gz /home
service sshd restart
# cat /var/log/messages | grep [Ff]ailed | less

18. Documentation about sysconfig network scripts
/usr/share/doc/initscripts-*/sysconfig.txt
MailTo=student@server6.example.com
tar cxtv
/etc/ssh/sshd_config

19. Extract a star compressed file
# star -x -f=home.star
yum provides
logwatch
rpm -ql vsftpd

20. fqdn
vsftpd
#yum groupinstall "group name"
Fully Qualified Domain Name
/etc/yum.repos.d/

21. Send all debug level messages to /var/log/debug.log
ip masqu
/etc/yum.repos.d/
#rpm -qa | grep [package name]
*.debug /var/log/debug.log service rsyslog restart

22. Copy a public ssh key to server6
add/remove software GUI
man search :/repository
ssh-copy-id root@server6.example.com
yum install tigervnc-server

23. Install star
#iptables -D INPUT -p tcp --dport 21 -j accpet
IPtables output chain
# yum
rsync /home root@server6.example.com:/tmp

24. Restart vnc and persist on boot
#rpm -qad [package name]
#yum groupremove "group name"
service vncserver restart chkconfig vncserver on
yum install tigervnc-server

25. Restart the ntpd service
#yum install [package name]
service ntpd restart
# grep -i
tar czvf /tmp/etc.tar.gz /etc

26. Restart ssh services
service sshd restart
chkconfig vsftpd on
rpm localinstall pkg.rpm --nogpgcheck
palimpsest

27. Edit files with cat until the _EOF is found
/etc/ssh/sshd_config
cat >> some_file << _EOF
ssh-copy-id root@server6.example.com
# yum

28. Flush the firewall of all rules
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
/var/www/html/
#iptables -F
#iptables -I INPUT -p tcp --dport 21 -j Accept

29. Disk Utility Command
updating the kernel
palimpsest
rsync /home root@server6.example.com:/tmp
ip masqu

30. Process packets coming into the system
IPtables input chain
#rpm -qac [package name]
# star -xattr -H=exustar -c -f=home.star /home/
/etc/sysconfig/network

31. Stores IPtables rules (filter) chains - input forward output are persistant
$ grep -v ^# /etc/nsswitch.conf
/etc/sysconfig/iptables
/etc/sysconfig/network
MailTo=student@server6.example.com

32. Stores filewall rules for the system.
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
/etc/sysconfig/iptables
chkconfig vsftpd on
IPtables output chain

33. Set a VNC password
#virsh destroy domain-id
man search :/repository
vncpasswd
/etc/yum.repos.d/

34. Install a package with yum
#yum remove [package name]
updating the kernel
#yum install [package name]
insert as opposed to append

35. Repos for yum
/etc/yum.repos.d
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
#rpm -qac [package name]
/var/log/messages

36. List iptables
/etc/ssh/sshd_config
cat >> some_file << _EOF
#iptables -L
logwatch

37. Generate SSH Keys
/var/log/secure
# grep -i
ssh-keygen
#yum groupinstall "group name"

38. All messages sent at info priority or higher
rsync /home root@server6.example.com:/tmp
/var/log/messages
vsftpd
rpm --import [public key location]

39. Local host file (contains hostname). Can contain local system DNS.
vncviewer -via student@server6 localhost:2
yum info firefox4
/etc/hosts
Fully Qualified Domain Name

40. Get information about a package named firefox4
yum info firefox4
#yum groupremove "group name"
/etc/yum.repos.d/
#iptables -F

41. Redirect errors to std out
# yum
2>&1
/etc/sysconfig/resolv.conf
yum info firefox4

42. Append add to the end of the IPtables rules. insert will put rule above the deny all rule.
rpm -q pkg.rpm --scripts
/etc/yum.repos.d
yum search firefox
insert as opposed to append

43. Start vsftp service
$ tar xzvf home.tar.gz /home
service sshd restart
vsftpd restart
$ grep -v ^# /etc/nsswitch.conf

44. Gets kernel version and release number
IPtables input chain
rsync /home root@server6.example.com:/tmp
#uname -r
tar fzj

45. tar options for file name - gzip - and bzip2
tar fzj
rpm localinstall pkg.rpm --nogpgcheck
rpm -q pkg.rpm --scripts
cp /home/test1.html /var/www/html/test1.html

46. original DNS config file - still used
system-config-firewall tui
cp /home/test1.html /var/www/html/test1.html
#yum
/etc/sysconfig/resolv.conf

47. handles dependencies while RPMs do not uses preconfigured repos
#rpm -qa | grep [package name]
/var/log/cron
/etc/services
#yum

48. Determine which package provides SSH
#iptables -F
yum provides "*/sbin/sshd"
yum install firefox4
updating the kernel

49. Use lftp to connect
rpm -q pkg.rpm --scripts
logwatch
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
tar czvf /tmp/etc.tar.gz /etc

50. Enable anonymous users - disable local accounts - and disable any uploads to the FTP server
chkconfig httpd on
#yum install [package name]
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
system-config-date