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RHCSA Commands

Subjects : certifications, it-skills, rhcsa

Instructions:

Answer 50 questions in 15 minutes.
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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. Grep for lines that do not match (-v)
ip masqu
$ grep -v ^# /etc/nsswitch.conf
rhn_register
vsftpd restart

2. File holding services - ports - protocols assoicated
.spec
/etc/services
updating the kernel
#yum groupremove "group name"

3. Stores filewall rules for the system.
/etc/yum.repos.d
vsftpd
/etc/sysconfig/iptables
rpm -q pkg.rpm --scripts

4. Redirect errors to std out
service ntpd restart
rpm -q pkg.rpm --scripts
2>&1
chkconfig vsftpd on

5. See files installed with a package named vsftpd
# virsh create /etc/libvert/qemu/vm_file_name.xml
# renice -10 proc-id
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

6. Append this to the /etc/rsyslog.conf to send mail to student@server6.example.com
MailTo=student@server6.example.com
# star -xattr -H=exustar -c -f=home.star /home/
$ grep -v ^# /etc/nsswitch.conf
/etc/hosts

7. Remote file copy /home/test1.html to the /var/pub directory on server6
rsync /home/test1.html root@server6.example.com:/var/pub
GUI menu system/administratrion/firewall
palimpsest
IPtables input chain

8. Grep with ignoring case
vncpasswd
# grep -i
vncviewer -via student@server6 localhost:2
service vncserver restart chkconfig vncserver on

9. Messages related to cron log
add/remove software GUI
/var/log/cron
yum update
rpm -qc httpd

10. Delete a rule from iptables
$ grep -v ^# /etc/nsswitch.conf
yum install firefox4
#iptables -D INPUT -p tcp --dport 21 -j accpet
#rpm -qi [package name]

11. List VMs
vsftpd restart
#yum groupinstall "group name"
#virsh list
/etc/sysconfig/iptables

12. All messages sent at info priority or higher
nautilus
MailTo=student@server6.example.com
/var/log/messages
2>&1

13. Query all documentation with RPM
#rpm -qad [package name]
rpm --import [public key location]
yum install firefox4
#virsh destroy domain-id

14. Location of repo's
/dev
ssh-copy-id root@server6.example.com
# grep -i
/etc/yum.repos.d/

15. Persist FTP on boot
tar cxtv
chkconfig vsftpd on
rpm --import [public key location]
yum list

16. Copy a public ssh key to server6
rpm -q pkg.rpm --scripts
man search :/repository
#iptables -I INPUT -p tcp --dport 21 -j Accept
ssh-copy-id root@server6.example.com

17. Remote file copy /home/test1.html to the /var/pub directory on server6 while preserving metadata
.spec
rpm -q pkg.rpm --scripts
rsync -a /home/test1.html root@server6.example.com:/var/pub
$ tar czvf home.tar.gz /home

18. Should be done with yum and install as opposed to update if done with RPM option "i" should be used and not "u"
2>&1
#iptables -D INPUT -p tcp --dport 21 -j accpet
IPtables output chain
updating the kernel

19. System config firewall
GUI menu system/administratrion/firewall
# star -x -f=home.star
rpm --import [public key location]
#iptables -D INPUT -p tcp --dport 21 -j accpet

20. Install a package named firefox4
#rpm -ivh [package name]
logwatch
yum install firefox4
*.debug /var/log/debug.log service rsyslog restart

21. Search for a package within all packages
#iptables -I INPUT -p tcp --dport 21 -j Accept
service sshd restart
#rpm -qa | grep [package name]
yum update

22. Restart the ntpd service
/var/log/messages
service ntpd restart
$ grep -v ^# /etc/nsswitch.conf
ln -s /pub /var/www/html/pub

23. original DNS config file - still used
chkconfig httpd on
/etc/hosts
/usr/share/doc/initscripts-*/sysconfig.txt
/etc/sysconfig/resolv.conf

24. File containing information to create rpm package - RPM packages contain these files: libraries or application - any documentation - any configuration files
/etc/yum.repos.d/
yum update
.spec
/var/log/cron

25. Search for a package with firefox in the description
yum search firefox
/etc/sysconfig/resolv.conf
# grep -i
/etc/sysconfig/iptables

26. Kill a VM
#rpm -uvh [package name]
# vi /etc/inittab change - id:3:initdefault:
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
#virsh destroy domain-id

27. Sync ntp time with the instructor
ntpdate -b instructor
rpm localinstall pkg.rpm --nogpgcheck
rsync /home/test1.html root@server6.example.com:/var/pub
tar czvf /tmp/etc.tar.gz /etc

28. Configuration for VNC
/etc/sysconfig/vncservers rpm -ql tigervnc-server
#virsh destroy domain-id
#rpm -uvh [package name]
# cat /var/log/messages | grep [Ff]ailed | less

29. Start the GUI for date configuration
#iptables -F
#yum grouplist
# ls -l /usr/share/doc | grep httpd
system-config-date

30. Install a package group with yum
rpm -qp pkg.rpm
/var/log/messages
rpm -q pkg.rpm --scripts
#yum groupinstall "group name"

31. Disk Utility Command
palimpsest
ip masqu
/var/lib/rpm
#yum groupinstall "group name"

32. fqdn
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
#yum info [package name]
Fully Qualified Domain Name
/etc/sysconfig/network

33. Repos for yum
/etc/sysconfig/network
/etc/yum.repos.d
cat >> some_file << _EOF
name-version-release.architecture.rpm

34. handles dependencies while RPMs do not uses preconfigured repos
#yum
rsync /home/test1.html root@server6.example.com:/var/pub
service vncserver restart chkconfig vncserver on
# virsh create /etc/libvert/qemu/vm_file_name.xml

35. tar options for file name - gzip - and bzip2
vncpasswd
rsync /home/test1.html root@server6.example.com:/var/pub
tar fzj
/dev

36. Rpm upgrade package u upgrade v verbose h hash
/etc/ssh/sshd_config
insert as opposed to append
#yum groupinstall "group name"
#rpm -uvh [package name]

37. Remove a package with yum
chkconfig vsftpd on
#yum remove [package name]
/var/www/html/
# ls -l /usr/share/doc | grep httpd

38. Configuration file for system logs
#rpm -uvh [package name]
$ tar xzvf home.tar.gz /home
/dev
/etc/rsyslog.conf

39. Generate SSH Keys
logwatch
yum install firefox4
ssh-copy-id root@server6.example.com
ssh-keygen

40. Where are HTML pages hosted?
/var/www/html/
# virsh create /etc/libvert/qemu/vm_file_name.xml
tar czvf /tmp/etc.tar.gz /etc
/var/log/maillog

41. Primary configuration of ssh
rpm --import [public key location]
# star -x -f=home.star
/etc/ssh/sshd_config
service sshd restart

42. Adjust the persistent runlevel
# vi /etc/inittab change - id:3:initdefault:
$ grep -v ^# /etc/nsswitch.conf
#iptables -I INPUT -p tcp --dport 21 -j Accept
#rpm -qa | grep [package name]

43. Email related messages log
# ls -l /usr/share/doc | grep httpd
/var/log/maillog
# renice -10 proc-id
tar cxtv

44. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
*.debug /var/log/debug.log service rsyslog restart
#iptables -I INPUT -p tcp --dport 21 -j Accept
#yum grouplist
#iptables -L

45. Process packets being forwarded through the system
rpm -qc httpd
# vi /etc/inittab change - id:3:initdefault:
IPtables forward chain
#virsh destroy domain-id

46. Program to analyze standard log files and send a summary email to root
/dev
#rpm -uvh [package name]
logwatch
tar czvf /tmp/etc.tar.gz /etc

47. Connect with VNC viewer securely
#rpm -qa | grep [package name]
vncviewer -via student@server6 localhost:2
#yum groupremove "group name"
yum search firefox

48. Set a VNC password
ssh-copy-id root@server6.example.com
vncpasswd
/etc/sysconfig/iptables
tar czvf /tmp/etc.tar.gz /etc

49. Edit files with cat until the _EOF is found
/var/www/html/
rpm -qp pkg.rpm
chkconfig vsftpd on
cat >> some_file << _EOF

50. Stores IPtables rules (filter) chains - input forward output are persistant
#uname -r
/etc/sysconfig/iptables
logwatch
IPtables forward chain

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Can you answer 50 questions in 15 minutes?

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RHCSA Commands

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