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. Install a package group with yum
vsftpd
/etc/sysconfig/vncservers rpm -ql tigervnc-server
#yum groupinstall "group name"
*.debug /var/log/debug.log service rsyslog restart

2. GUI install / uninstall with yum
/etc/sysconfig/iptables
nautilus
add/remove software GUI
name-version-release.architecture.rpm

3. Set process priority with renice - -20 highest - 20 lowest - 0 is default
yum install firefox4
/etc/sysconfig/resolv.conf
vsftpd restart
# renice -10 proc-id

4. tar options for create - extract - test - and verbose
tar cxtv
[email protected]
ln -s /pub /var/www/html/pub
service ntpd restart

5. System config firewall
yum provides
vncviewer -via student@server6 localhost:2
ip masqu
GUI menu system/administratrion/firewall

6. Query information files with RPM
# star -x -f=home.star
rsync -PHR /home/test1.html [email protected]:/var/pub
/var/log/maillog
#rpm -qi [package name]

7. List installed and available packages
yum provides "*/sbin/sshd"
IPtables forward chain
yum list
yum update

8. Create a tar ball with gzip compression of the home dir
$ tar czvf home.tar.gz /home
yum info firefox4
IPtables forward chain
/etc/hosts

9. Process packets coming into the system
# grep -i
IPtables input chain
#virsh destroy domain-id
vsftpd

10. Install a pkg.rpm locally
logwatch
rpm localinstall pkg.rpm --nogpgcheck
#ip addr show
/etc/yum.repos.d

11. Connect with VNC viewer securely
IPtables input chain
#uname -r
man search :/repository
vncviewer -via student@server6 localhost:2

12. Adjust the persistent runlevel
vsftpd restart
# vi /etc/inittab change - id:3:initdefault:
rpm -qc httpd
$ grep -v ^# /etc/nsswitch.conf

13. Persist FTP on boot
yum provides "*/sbin/sshd"
chkconfig vsftpd on
#yum grouplist
#virsh destroy domain-id

14. Install the VNC server package
yum install tigervnc-server
tar fzj
/etc/sysconfig/iptables
#ip addr show

15. Send all debug level messages to /var/log/debug.log
Fully Qualified Domain Name
*.debug /var/log/debug.log service rsyslog restart
/etc/sysconfig/iptables
#uname -r

16. Register on the RHN
/etc/hosts
IPtables output chain
rhn_register
Fully Qualified Domain Name

17. Edit files with cat until the _EOF is found
#yum install [package name]
IPtables forward chain
cat >> some_file << _EOF
chkconfig httpd on

18. Get information about a package named firefox4
/etc/rsyslog.conf
ln -s /pub /var/www/html/pub
yum info firefox4
logwatch

19. Search for command in the doc directory
IPtables input chain
# star -xattr -H=exustar -c -f=home.star /home/
# ls -l /usr/share/doc | grep httpd
ssh-copy-id [email protected]

20. Where are HTML pages hosted?
#iptables -I INPUT -p tcp --dport 21 -j Accept
/var/www/html/
service sshd restart
#yum info [package name]

21. Install a package with yum
#yum info [package name]
#iptables -I INPUT -p tcp --dport 21 -j Accept
#yum groupremove "group name"
#yum install [package name]

22. Remove a package with yum
# vi /etc/inittab change - id:3:initdefault:
#yum remove [package name]
/usr/share/doc/initscripts-*/sysconfig.txt
#yum groupremove "group name"

23. tar options for file name - gzip - and bzip2
system-config-firewall tui
tar fzj
$ tar xzvf home.tar.gz /home
logwatch

24. Install a package named firefox4
/etc/sysconfig/network
yum install firefox4
system-config-firewall tui
add/remove software GUI

25. Documentation about sysconfig network scripts
# grep -i
tar fzj
/etc/sysconfig/iptables
/usr/share/doc/initscripts-*/sysconfig.txt

26. See files installed with a package named vsftpd
.spec
#yum info [package name]
# star -x -f=home.star
rpm -ql vsftpd

27. Extract a star compressed file
# star -x -f=home.star
IPtables input chain
*.debug /var/log/debug.log service rsyslog restart
#yum grouplist

28. Install with RPM
#rpm -ivh [package name]
service sshd restart
*.debug /var/log/debug.log service rsyslog restart
#rpm -qa | grep [package name]

29. Email related messages log
man search :/repository
# star -x -f=home.star
# ls -l /usr/share/doc | grep httpd
/var/log/maillog

30. Kill a VM
yum install tigervnc-server
/etc/sysconfig/network
#virsh destroy domain-id
$ grep -v ^# /etc/nsswitch.conf

31. Rpm upgrade package u upgrade v verbose h hash
yum info firefox4
/etc/sysconfig/resolv.conf
IPtables output chain
#rpm -uvh [package name]

32. List scripts that can be run after installation of pkg.rpm
man search :/repository
IPtables forward chain
#yum groupinstall "group name"
rpm -q pkg.rpm --scripts

33. Authentication related messages log
/var/log/secure
IPtables input chain
#rpm -qac [package name]
service sshd restart

34. Uninstall a package group with yum
yum remove firefox4
#yum groupremove "group name"
cat >> some_file << _EOF
rsync /home [email protected]:/tmp

35. 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
GUI menu system/administratrion/firewall
insert as opposed to append
rsync -PHR /home/test1.html [email protected]:/var/pub

36. Remote file copy /home/test1.html to the /var/pub directory on server6
IPtables forward chain
rsync /home/test1.html [email protected]:/var/pub
rpm -q pkg.rpm --scripts
#iptables -I INPUT -p tcp --dport 21 -j Accept

37. All messages sent at info priority or higher
vncpasswd
/etc/rsyslog.conf
/var/log/messages
yum install firefox4

38. Backup a home directory on desktop6 to /tmp on server6
palimpsest
#rpm -uvh [package name]
rsync /home/test1.html [email protected]:/var/pub
rsync /home [email protected]:/tmp

39. Update a package
yum update
#uname -r
service ntpd restart
IPtables output chain

40. Set a VNC password
#yum groupinstall "group name"
/etc/hosts
vncpasswd
$ grep -v ^# /etc/nsswitch.conf

41. Configuration file for system logs
IPtables input chain
/etc/rsyslog.conf
# star -x -f=home.star
name-version-release.architecture.rpm

42. Install the star compression tool create an archive with the star tool.
#uname -r
/etc/yum.repos.d
# star -xattr -H=exustar -c -f=home.star /home/
#ip addr show

43. Sync ntp time with the instructor
/etc/ssh/sshd_config
palimpsest
ntpdate -b instructor
# star -xattr -H=exustar -c -f=home.star /home/

44. Repos for yum
#rpm -qa | grep [package name]
service sshd restart
/etc/yum.repos.d
/etc/yum.repos.d/

45. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
#virsh destroy domain-id
#iptables -I INPUT -p tcp --dport 21 -j Accept
/etc/services
rpm localinstall pkg.rpm --nogpgcheck

46. Flush the firewall of all rules
/etc/sysconfig/network
#iptables -F
#ip addr show
rsync /home [email protected]:/tmp

47. Get a list of package groups from yum
#rpm -uvh [package name]
tar czvf /tmp/etc.tar.gz /etc
# yum
#yum grouplist

48. Start GUI for Firewall
# renice -10 proc-id
/etc/hosts
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
[email protected]

49. Redirect errors to std out
/var/log/secure
# grep -i
rpm -ql vsftpd
2>&1

50. Messages related to cron log
/var/log/cron
2>&1
# yum
#yum