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. Get more information on a package availale through yum
/etc/yum.repos.d
#yum info [package name]
updating the kernel
#iptables -L

2. Repo config file
service sshd restart
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
[repo identifier] name=[repo name] baseurl=[repo url] enabled = 1 gpgcheck = 1 (0 for local system) gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release -file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta
rpm -ql vsftpd

3. Local file copy of /home/test1.html to /var/www/html/test1.html
#iptables -I INPUT -p tcp --dport 21 -j Accept
*.debug /var/log/debug.log service rsyslog restart
cp /home/test1.html /var/www/html/test1.html
/var/log/messages

4. Query information files with RPM
#rpm -qi [package name]
Fully Qualified Domain Name
vncviewer -via student@server6 localhost:2
chkconfig vsftpd on

5. Display packages that match the pathname
yum provides
#rpm -qa | grep [package name]
tar cxtv
# star -x -f=home.star

6. Adjust the persistent runlevel
man search :/repository
#uname -r
service ntpd restart
# vi /etc/inittab change - id:3:initdefault:

7. Append this to the /etc/rsyslog.conf to send mail to student@server6.example.com
#ip addr show
# cat /var/log/messages | grep [Ff]ailed | less
/etc/hosts
MailTo=student@server6.example.com

8. tar options for file name - gzip - and bzip2
#yum groupremove "group name"
rpm -ql vsftpd
service vncserver restart chkconfig vncserver on
tar fzj

9. Process packets being forwarded through the system
IPtables forward chain
[repo identifier] name=[repo name] baseurl=[repo url] enabled = 1 gpgcheck = 1 (0 for local system) gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release -file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta
GUI menu system/administratrion/firewall
/etc/yum.repos.d

10. Remote file copy /home/test1.html to the /var/pub directory on server6 while preserving metadata
rsync -a /home/test1.html root@server6.example.com:/var/pub
#rpm -qad [package name]
chkconfig httpd on
/var/log/cron

11. Stores IPtables rules (filter) chains - input forward output are persistant
Fully Qualified Domain Name
ssh-copy-id root@server6.example.com
#yum groupinstall "group name"
/etc/sysconfig/iptables

12. Show IP address with the IP command
/var/log/messages
#rpm -uvh [package name]
/etc/sysconfig/resolv.conf
#ip addr show

13. Connect with VNC viewer securely
yum search firefox
/var/log/cron
cp /home/test1.html /var/www/html/test1.html
vncviewer -via student@server6 localhost:2

14. System config firewall
man search :/repository
[repo identifier] name=[repo name] baseurl=[repo url] enabled = 1 gpgcheck = 1 (0 for local system) gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release -file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta
GUI menu system/administratrion/firewall
insert as opposed to append

15. See the configuration files installed with a package named httpd
ntpdate -b instructor
#ip addr show
/var/lib/rpm
rpm -qc httpd

16. Gets kernel version and release number
vncviewer -via student@server6 localhost:2
#virsh list
#uname -r
IPtables input chain

17. Program to analyze standard log files and send a summary email to root
service sshd restart
logwatch
#yum
service ntpd restart

18. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
$ tar xzvf home.tar.gz /home
#iptables -L
#iptables -I INPUT -p tcp --dport 21 -j Accept
#yum grouplist

19. Messages related to cron log
man search :/repository
logwatch
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
/var/log/cron

20. Remote copy /home/test1.html to the /var/pub directory on server6 with progress - preserving hard links - and using relative path names
service sshd restart
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
#rpm -ivh [package name]
#rpm -qad [package name]

21. Install with RPM
#rpm -ivh [package name]
IPtables output chain
#uname -r
#ip addr show

22. Delete a rule from iptables
service ntpd restart
/etc/sysconfig/resolv.conf
#iptables -D INPUT -p tcp --dport 21 -j accpet
vsftpd

23. Where are HTML pages hosted?
IPtables input chain
ip masqu
/var/www/html/
#yum groupinstall "group name"

24. Search for command in the doc directory
# ls -l /usr/share/doc | grep httpd
#yum install [package name]
chkconfig vsftpd on
rpm -qp pkg.rpm

25. Determine which package provides SSH
yum provides "*/sbin/sshd"
#yum grouplist
# renice -10 proc-id
#iptables -I INPUT -p tcp --dport 21 -j Accept

26. Configuration file for system logs
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
system-config-firewall tui
/etc/sysconfig/resolv.conf
/etc/rsyslog.conf

27. Persist the web server on boot
#yum install [package name]
[repo identifier] name=[repo name] baseurl=[repo url] enabled = 1 gpgcheck = 1 (0 for local system) gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release -file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta
#rpm -ivh [package name]
chkconfig httpd on

28. Restart the ntpd service
updating the kernel
service ntpd restart
/etc/yum.repos.d/
#rpm -qac [package name]

29. Start vsftp service
/var/log/secure
vsftpd restart
MailTo=student@server6.example.com
service sshd restart

30. Configuration for VNC
logwatch
/etc/sysconfig/vncservers rpm -ql tigervnc-server
/etc/ssh/sshd_config
yum search firefox

31. See files installed with a package named vsftpd
rpm -ql vsftpd
#virsh destroy domain-id
rsync -a /home/test1.html root@server6.example.com:/var/pub
#uname -r

32. Should be done with yum and install as opposed to update if done with RPM option "i" should be used and not "u"
yum provides "*/sbin/sshd"
updating the kernel
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
#yum groupinstall "group name"

33. Install a pkg.rpm locally
#rpm -qac [package name]
#yum groupremove "group name"
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
rpm localinstall pkg.rpm --nogpgcheck

34. Install a package named firefox4
# vi /etc/inittab change - id:3:initdefault:
vncviewer -via student@server6 localhost:2
#rpm -qad [package name]
yum install firefox4

35. Kill a VM
/etc/ssh/sshd_config
#virsh destroy domain-id
/dev
# cat /var/log/messages | grep [Ff]ailed | less

36. An example of searching through system logs with interpretation.
cat >> some_file << _EOF
/var/lib/rpm
# cat /var/log/messages | grep [Ff]ailed | less
/etc/ssh/sshd_config

37. original DNS config file - still used
ip masqu
yum list
/etc/sysconfig/resolv.conf
vsftpd restart

38. Import a public key
#virsh list
rpm --import [public key location]
service ntpd restart
#iptables -F

39. Process packets coming into the system
2>&1
# vi /etc/inittab change - id:3:initdefault:
IPtables input chain
yum remove firefox4

40. Grep with ignoring case
logwatch
#virsh destroy domain-id
# grep -i
IPtables output chain

41. Search for a package with firefox in the description
vncpasswd
yum list
yum search firefox
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)

42. fqdn
#virsh list
updating the kernel
Fully Qualified Domain Name
/etc/sysconfig/network

43. Register on the RHN
#yum
rhn_register
service ntpd restart
yum update

44. Remove a package with yum
#virsh destroy domain-id
IPtables forward chain
#yum remove [package name]
/var/www/html/

45. Create a symbolic link to /pub on the FTP and name it pub
*.debug /var/log/debug.log service rsyslog restart
ln -s /pub /var/www/html/pub
#rpm -qi [package name]
# yum

46. Start GUI for Firewall
yum provides
/var/log/cron
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
/etc/ssh/sshd_config

47. Shell config tool gropued like GUI firewall configurater.
# yum
system-config-firewall tui
#rpm -uvh [package name]
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd

48. Install star
vsftpd restart
vncpasswd
# yum
# star -x -f=home.star

49. Create a tar ball with gzip compression of the home dir
$ tar czvf home.tar.gz /home
vsftpd restart
/etc/yum.repos.d
MailTo=student@server6.example.com

50. Get information about a package named firefox4
yum info firefox4
# ls -l /usr/share/doc | grep httpd
/var/log/maillog
#yum grouplist