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. An example of searching through system logs with interpretation.
/etc/sysconfig/iptables
# renice -10 proc-id
# vi /etc/inittab change - id:3:initdefault:
# cat /var/log/messages | grep [Ff]ailed | less

2. Start vsftp service
vsftpd restart
#yum grouplist
GUI menu system/administratrion/firewall
nautilus

3. Update a package
# renice -10 proc-id
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
yum update
ln -s /pub /var/www/html/pub

4. Create a tar ball with gzip compression of the home dir
# yum
ssh-keygen
/var/log/maillog
$ tar czvf home.tar.gz /home

5. Connect with VNC viewer securely
vsftpd
vncviewer -via student@server6 localhost:2
/etc/sysconfig/iptables
$ grep -v ^# /etc/nsswitch.conf

6. Configuration file for system logs
rpm -q pkg.rpm --scripts
/etc/rsyslog.conf
rsync -a /home/test1.html root@server6.example.com:/var/pub
/etc/sysconfig/network

7. Display packages that match the pathname
rhn_register
yum provides
#virsh destroy domain-id
yum update

8. Get more information on a package availale through yum
$ grep -v ^# /etc/nsswitch.conf
service vncserver restart chkconfig vncserver on
rsync /home/test1.html root@server6.example.com:/var/pub
#yum info [package name]

9. Acting as a router with forwarding
logwatch
ip masqu
cp /home/test1.html /var/www/html/test1.html
/etc/rsyslog.conf

10. Search for a package within all packages
#rpm -qa | grep [package name]
#rpm -qad [package name]
rpm --import [public key location]
yum provides "*/sbin/sshd"

11. Create a symbolic link to /pub on the FTP and name it pub
rsync -a /home/test1.html root@server6.example.com:/var/pub
/var/lib/rpm
rsync /home root@server6.example.com:/tmp
ln -s /pub /var/www/html/pub

12. Location of repo's
chkconfig vsftpd on
/etc/yum.repos.d/
service sshd restart
rsync -PHR /home/test1.html root@server6.example.com:/var/pub

13. Program to analyze standard log files and send a summary email to root
$ grep -v ^# /etc/nsswitch.conf
#iptables -F
logwatch
# yum

14. Stores filewall rules for the system.
/etc/sysconfig/iptables
# star -xattr -H=exustar -c -f=home.star /home/
# vi /etc/inittab change - id:3:initdefault:
updating the kernel

15. Flush the firewall of all rules
ln -s /pub /var/www/html/pub
2>&1
#rpm -qi [package name]
#iptables -F

16. Grep with ignoring case
tar czvf /tmp/etc.tar.gz /etc
# grep -i
Fully Qualified Domain Name
yum provides

17. Restart vnc and persist on boot
rpm -q pkg.rpm --scripts
service vncserver restart chkconfig vncserver on
updating the kernel
#yum info [package name]

18. Disks available for partitions
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
yum search firefox
/dev
insert as opposed to append

19. Stores IPtables rules (filter) chains - input forward output are persistant
tar czvf /tmp/etc.tar.gz /etc
/etc/sysconfig/iptables
cp /home/test1.html /var/www/html/test1.html
/var/log/cron

20. Extract a star compressed file
# star -x -f=home.star
rpm -q pkg.rpm --scripts
#iptables -I INPUT -p tcp --dport 21 -j Accept
vncpasswd

21. See the configuration files installed with a package named httpd
yum provides
rsync -a /home/test1.html root@server6.example.com:/var/pub
rpm -qc httpd
ssh-keygen

22. Search for command in the doc directory
#virsh destroy domain-id
# ls -l /usr/share/doc | grep httpd
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
#yum info [package name]

23. Query information files with RPM
insert as opposed to append
#rpm -qi [package name]
rpm -qc httpd
yum provides "*/sbin/sshd"

24. Append add to the end of the IPtables rules. insert will put rule above the deny all rule.
#iptables -I INPUT -p tcp --dport 21 -j Accept
tar fzj
insert as opposed to append
MailTo=student@server6.example.com

25. Repos for yum
IPtables input chain
/etc/sysconfig/iptables
yum provides "*/sbin/sshd"
/etc/yum.repos.d

26. Install a package with yum
#rpm -uvh [package name]
service sshd restart
#yum install [package name]
yum install firefox4

27. Persist the web server on boot
yum provides "*/sbin/sshd"
service vncserver restart chkconfig vncserver on
vsftpd
chkconfig httpd on

28. Persist FTP on boot
/var/lib/rpm
chkconfig vsftpd on
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
system-config-date

29. Kill a VM
name-version-release.architecture.rpm
#virsh destroy domain-id
ip masqu
rpm -ql vsftpd

30. Create a gzip-compressed backup of /etc in /tmp
nautilus
$ grep -v ^# /etc/nsswitch.conf
IPtables output chain
tar czvf /tmp/etc.tar.gz /etc

31. Redirect errors to std out
2>&1
/etc/ssh/sshd_config
rsync /home/test1.html root@server6.example.com:/var/pub
rpm localinstall pkg.rpm --nogpgcheck

32. Import a public key
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
tar czvf /tmp/etc.tar.gz /etc
Fully Qualified Domain Name
rpm --import [public key location]

33. Set a VNC password
rpm localinstall pkg.rpm --nogpgcheck
vncpasswd
/etc/ssh/sshd_config
ln -s /pub /var/www/html/pub

34. Remove a package named firefox4
IPtables output chain
updating the kernel
yum remove firefox4
vncviewer -via student@server6 localhost:2

35. Extract /tmp/etc.tar.gz to /etc
tar xvzf /tmp/etc.tar.gz /etc
name-version-release.architecture.rpm
nautilus
vncpasswd

36. List scripts that can be run after installation of pkg.rpm
[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 -q pkg.rpm --scripts
rpm localinstall pkg.rpm --nogpgcheck
yum search firefox

37. Authentication related messages log
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
/var/log/secure
#rpm -qad [package name]
/etc/sysconfig/vncservers rpm -ql tigervnc-server

38. Enable anonymous users - disable local accounts - and disable any uploads to the FTP server
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
add/remove software GUI
rpm --import [public key location]
#rpm -qac [package name]

39. Start a VM
/var/log/cron
/dev
# virsh create /etc/libvert/qemu/vm_file_name.xml
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

40. Sync ntp time with the instructor
ntpdate -b instructor
rsync -a /home/test1.html root@server6.example.com:/var/pub
name-version-release.architecture.rpm
#virsh list

41. Primary configuration of ssh
/etc/ssh/sshd_config
Fully Qualified Domain Name
#rpm -qac [package name]
# grep -i

42. Local host file (contains hostname). Can contain local system DNS.
/etc/sysconfig/vncservers rpm -ql tigervnc-server
nautilus
/etc/hosts
#virsh list

43. Where are HTML pages hosted?
/var/www/html/
ln -s /pub /var/www/html/pub
yum provides
# star -x -f=home.star

44. All messages sent at info priority or higher
/var/log/messages
palimpsest
yum info firefox4
cat >> some_file << _EOF

45. RPM package naming
tar czvf /tmp/etc.tar.gz /etc
name-version-release.architecture.rpm
#virsh list
#yum groupinstall "group name"

46. Search for a package with firefox in the description
yum search firefox
# cat /var/log/messages | grep [Ff]ailed | less
#virsh list
add/remove software GUI

47. GUI install / uninstall with yum
rhn_register
#virsh destroy domain-id
add/remove software GUI
/var/log/secure

48. Gets kernel version and release number
palimpsest
#uname -r
#yum groupremove "group name"
tar cxtv

49. Process packets coming into the system
IPtables input chain
yum list
/var/lib/rpm
# grep -i

50. Query all documentation with RPM
tar czvf /tmp/etc.tar.gz /etc
#rpm -qad [package name]
# virsh create /etc/libvert/qemu/vm_file_name.xml
insert as opposed to append