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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. Extract a gzipped tar ball in your home directory
$ tar xzvf home.tar.gz /home
.spec
nautilus
/etc/hosts

2. Configuration for VNC
#yum groupinstall "group name"
#rpm -qad [package name]
# cat /var/log/messages | grep [Ff]ailed | less
/etc/sysconfig/vncservers rpm -ql tigervnc-server

3. Gets kernel version and release number
IPtables forward chain
#uname -r
#iptables -F
#rpm -qa | grep [package name]

4. Get information about a package named firefox4
/etc/hosts
/var/lib/rpm
yum info firefox4
#rpm -qad [package name]

5. Edit files with cat until the _EOF is found
*.debug /var/log/debug.log service rsyslog restart
cat >> some_file << _EOF
#virsh list
#yum grouplist

6. Restart ssh services
service sshd restart
#yum
updating the kernel
#ip addr show

7. Process packets being forwarded through the system
ssh-copy-id root@server6.example.com
/etc/rsyslog.conf
rhn_register
IPtables forward chain

8. Install a package with yum
add/remove software GUI
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
insert as opposed to append
#yum install [package name]

9. Enable anonymous users - disable local accounts - and disable any uploads to the FTP server
# yum
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
2>&1
yum provides "*/sbin/sshd"

10. See the configuration files installed with a package named httpd
$ grep -v ^# /etc/nsswitch.conf
#rpm -qac [package name]
MailTo=student@server6.example.com
rpm -qc httpd

11. Create a symbolic link to /pub on the FTP and name it pub
#yum remove [package name]
rpm --import [public key location]
ln -s /pub /var/www/html/pub
#yum grouplist

12. All messages sent at info priority or higher
chkconfig httpd on
MailTo=student@server6.example.com
/var/log/messages
rsync -a /home/test1.html root@server6.example.com:/var/pub

13. Repos for yum
/etc/yum.repos.d
vncpasswd
ssh-copy-id root@server6.example.com
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd

14. Install star
vsftpd restart
# yum
chkconfig vsftpd on
rpm --import [public key location]

15. Install with RPM
#iptables -L
#rpm -ivh [package name]
/usr/share/doc/initscripts-*/sysconfig.txt
ip masqu

16. List scripts that can be run after installation of pkg.rpm
yum info firefox4
rpm -q pkg.rpm --scripts
#yum groupremove "group name"
#virsh list

17. Uninstall a package group with yum
rpm -qc httpd
/etc/rsyslog.conf
#yum groupremove "group name"
tar xvzf /tmp/etc.tar.gz /etc

18. Local host file (contains hostname). Can contain local system DNS.
#iptables -L
/etc/hosts
rpm localinstall pkg.rpm --nogpgcheck
#iptables -F

19. GUI File Manager
vncviewer -via student@server6 localhost:2
nautilus
# yum
rpm -ql vsftpd

20. Set process priority with renice - -20 highest - 20 lowest - 0 is default
#iptables -F
/etc/sysconfig/network
# renice -10 proc-id
rpm -ql vsftpd

21. Send all debug level messages to /var/log/debug.log
#yum remove [package name]
*.debug /var/log/debug.log service rsyslog restart
yum info firefox4
#yum groupremove "group name"

22. Email related messages log
2>&1
#yum info [package name]
/var/log/maillog
yum search firefox

23. Repo config file
/etc/sysconfig/resolv.conf
palimpsest
[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
ssh-keygen

24. Stores filewall rules for the system.
/etc/sysconfig/iptables
/etc/ssh/sshd_config
MailTo=student@server6.example.com
service vncserver restart chkconfig vncserver on

25. Grep for lines that do not match (-v)
tar fzj
$ grep -v ^# /etc/nsswitch.conf
rpm -qp pkg.rpm
man search :/repository

26. Local file copy of /home/test1.html to /var/www/html/test1.html
/etc/sysconfig/vncservers rpm -ql tigervnc-server
cp /home/test1.html /var/www/html/test1.html
palimpsest
tar xvzf /tmp/etc.tar.gz /etc

27. Persist the web server on boot
chkconfig httpd on
#rpm -qa | grep [package name]
/usr/share/doc/initscripts-*/sysconfig.txt
# grep -i

28. Primary configuration of ssh
# yum
/etc/ssh/sshd_config
/etc/sysconfig/iptables
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd

29. Register on the RHN
rhn_register
#virsh list
#yum install [package name]
service ntpd restart

30. Shows network / global network variables: NETWORKING=yes HOSTNAME=shuttlehosti GATEWAY=192.168.88.1
/etc/sysconfig/network
rpm -qc httpd
$ grep -v ^# /etc/nsswitch.conf
man search :/repository

31. Extract a star compressed file
# star -x -f=home.star
/etc/services
#yum grouplist
yum search firefox

32. Start a VM
# virsh create /etc/libvert/qemu/vm_file_name.xml
rhn_register
# cat /var/log/messages | grep [Ff]ailed | less
service ntpd restart

33. Query configuration files with RPM
#rpm -qac [package name]
$ grep -v ^# /etc/nsswitch.conf
# star -x -f=home.star
chkconfig httpd on

34. Restart the ntpd service
service ntpd restart
ntpdate -b instructor
tar cxtv
yum provides "*/sbin/sshd"

35. Acting as a router with forwarding
#rpm -ivh [package name]
IPtables input chain
ip masqu
rsync -PHR /home/test1.html root@server6.example.com:/var/pub

36. Install the VNC server package
rsync /home/test1.html root@server6.example.com:/var/pub
# cat /var/log/messages | grep [Ff]ailed | less
yum install tigervnc-server
[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

37. Start the GUI for date configuration
IPtables input chain
/etc/sysconfig/iptables
# ls -l /usr/share/doc | grep httpd
system-config-date

38. Remote copy /home/test1.html to the /var/pub directory on server6 with progress - preserving hard links - and using relative path names
#rpm -qi [package name]
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
IPtables forward chain
GUI menu system/administratrion/firewall

39. Import a public key
rpm --import [public key location]
/etc/hosts
rsync /home root@server6.example.com:/tmp
#yum remove [package name]

40. Search for a package with firefox in the description
#yum info [package name]
rpm -qc httpd
yum info firefox4
yum search firefox

41. FTP package used in RHEL 6
/etc/rsyslog.conf
#yum info [package name]
tar xvzf /tmp/etc.tar.gz /etc
vsftpd

42. Shell config tool gropued like GUI firewall configurater.
/etc/yum.repos.d/
/etc/rsyslog.conf
system-config-firewall tui
tar fzj

43. Create a tar ball with gzip compression of the home dir
rpm -qc httpd
$ tar czvf home.tar.gz /home
rpm -qp pkg.rpm
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)

44. Install a package named firefox4
yum install firefox4
# star -xattr -H=exustar -c -f=home.star /home/
logwatch
#rpm -qa | grep [package name]

45. Program to analyze standard log files and send a summary email to root
.spec
rpm -qc httpd
logwatch
vsftpd restart

46. Configuration file for system logs
rpm -ql vsftpd
vncpasswd
/etc/rsyslog.conf
#iptables -L

47. Set a VNC password
# vi /etc/inittab change - id:3:initdefault:
system-config-date
vncpasswd
IPtables input chain

48. Sync ntp time with the instructor
ntpdate -b instructor
# vi /etc/inittab change - id:3:initdefault:
rpm -q pkg.rpm --scripts
ssh-copy-id root@server6.example.com

49. original DNS config file - still used
#yum grouplist
/etc/sysconfig/resolv.conf
#iptables -F
yum provides

50. Update a package
yum update
rpm -q pkg.rpm --scripts
insert as opposed to append
#yum groupremove "group name"

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Can you answer 50 questions in 15 minutes?

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Test your basic knowledge |

RHCSA Commands

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