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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. Send all debug level messages to /var/log/debug.log
chkconfig httpd on
/etc/services
yum update
*.debug /var/log/debug.log service rsyslog restart

2. Search for a package within all packages
tar fzj
#rpm -qa | grep [package name]
system-config-firewall tui
# cat /var/log/messages | grep [Ff]ailed | less

3. Persist FTP on boot
/etc/ssh/sshd_config
/var/lib/rpm
chkconfig vsftpd on
*.debug /var/log/debug.log service rsyslog restart

4. Process packets coming out of the system
yum install firefox4
rpm -qp pkg.rpm
logwatch
IPtables output chain

5. Remote copy /home/test1.html to the /var/pub directory on server6 with progress - preserving hard links - and using relative path names
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
#iptables -D INPUT -p tcp --dport 21 -j accpet
/var/log/messages
IPtables forward chain

6. Query information files with RPM
/etc/sysconfig/network
#iptables -L
service sshd restart
#rpm -qi [package name]

7. Copy a public ssh key to server6
insert as opposed to append
#rpm -qi [package name]
/dev
ssh-copy-id root@server6.example.com

8. Documentation about sysconfig network scripts
/usr/share/doc/initscripts-*/sysconfig.txt
/etc/sysconfig/resolv.conf
palimpsest
add/remove software GUI

9. Kill a VM
yum list
/etc/rsyslog.conf
#virsh destroy domain-id
ssh-keygen

10. Backup a home directory on desktop6 to /tmp on server6
# cat /var/log/messages | grep [Ff]ailed | less
#iptables -D INPUT -p tcp --dport 21 -j accpet
#uname -r
rsync /home root@server6.example.com:/tmp

11. Configuration for VNC
IPtables output chain
vsftpd restart
# yum
/etc/sysconfig/vncservers rpm -ql tigervnc-server

12. Local host file (contains hostname). Can contain local system DNS.
/etc/hosts
Fully Qualified Domain Name
ssh-keygen
yum remove firefox4

13. Repos for yum
/var/log/secure
ssh-copy-id root@server6.example.com
#yum info [package name]
/etc/yum.repos.d

14. List iptables
/var/log/cron
yum install firefox4
# ls -l /usr/share/doc | grep httpd
#iptables -L

15. Set a VNC password
#iptables -I INPUT -p tcp --dport 21 -j Accept
#iptables -D INPUT -p tcp --dport 21 -j accpet
vncpasswd
rsync /home/test1.html root@server6.example.com:/var/pub

16. Messages related to cron log
cat >> some_file << _EOF
rpm localinstall pkg.rpm --nogpgcheck
*.debug /var/log/debug.log service rsyslog restart
/var/log/cron

17. Extract /tmp/etc.tar.gz to /etc
#yum grouplist
man search :/repository
# yum
tar xvzf /tmp/etc.tar.gz /etc

18. Start the GUI for date configuration
tar xvzf /tmp/etc.tar.gz /etc
logwatch
# yum
system-config-date

19. 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
#yum groupremove "group name"
# vi /etc/inittab change - id:3:initdefault:

20. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
ip masqu
#iptables -I INPUT -p tcp --dport 21 -j Accept
IPtables input chain
#yum info [package name]

21. Use lftp to connect
/var/log/messages
# ls -l /usr/share/doc | grep httpd
ip masqu
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

22. An example of searching through system logs with interpretation.
# star -x -f=home.star
insert as opposed to append
/etc/rsyslog.conf
# cat /var/log/messages | grep [Ff]ailed | less

23. Disks available for partitions
/etc/sysconfig/iptables
/dev
# vi /etc/inittab change - id:3:initdefault:
/var/log/secure

24. Restart vnc and persist on boot
tar czvf /tmp/etc.tar.gz /etc
rpm -qc httpd
/var/log/maillog
service vncserver restart chkconfig vncserver on

25. Primary configuration of ssh
ip masqu
IPtables forward chain
/etc/ssh/sshd_config
/var/log/cron

26. Where are HTML pages hosted?
/var/www/html/
/var/log/maillog
2>&1
# yum

27. Show IP address with the IP command
#ip addr show
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
service ntpd restart
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd

28. Determine which package provides SSH
#yum install [package name]
yum provides "*/sbin/sshd"
tar xvzf /tmp/etc.tar.gz /etc
#rpm -qi [package name]

29. Local file copy of /home/test1.html to /var/www/html/test1.html
cp /home/test1.html /var/www/html/test1.html
#rpm -ivh [package name]
rhn_register
rpm -qp pkg.rpm

30. Install a package named firefox4
nautilus
Fully Qualified Domain Name
yum install firefox4
IPtables forward chain

31. See files installed with a package named vsftpd
*.debug /var/log/debug.log service rsyslog restart
# cat /var/log/messages | grep [Ff]ailed | less
#iptables -D INPUT -p tcp --dport 21 -j accpet
rpm -ql vsftpd

32. Install a package with yum
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
# virsh create /etc/libvert/qemu/vm_file_name.xml
#yum install [package name]
# vi /etc/inittab change - id:3:initdefault:

33. System config firewall
#iptables -I INPUT -p tcp --dport 21 -j Accept
#virsh destroy domain-id
GUI menu system/administratrion/firewall
vsftpd restart

34. Install a pkg.rpm locally
/etc/rsyslog.conf
#yum groupremove "group name"
#yum remove [package name]
rpm localinstall pkg.rpm --nogpgcheck

35. All messages sent at info priority or higher
#rpm -qa | grep [package name]
/var/log/messages
#yum install [package name]
ip masqu

36. Rpm upgrade package u upgrade v verbose h hash
#iptables -F
#rpm -uvh [package name]
cat >> some_file << _EOF
/dev

37. Get more information on a package availale through yum
/etc/sysconfig/iptables
# star -x -f=home.star
#yum info [package name]
logwatch

38. Disk Utility Command
/etc/sysconfig/resolv.conf
palimpsest
#rpm -qi [package name]
#rpm -qad [package name]

39. List VMs
#yum remove [package name]
#rpm -uvh [package name]
#virsh list
#virsh destroy domain-id

40. Configuration file for system logs
/etc/services
tar xvzf /tmp/etc.tar.gz /etc
/etc/sysconfig/iptables
/etc/rsyslog.conf

41. fqdn
insert as opposed to append
add/remove software GUI
Fully Qualified Domain Name
#yum info [package name]

42. List scripts that can be run after installation of pkg.rpm
IPtables forward chain
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
rpm -q pkg.rpm --scripts

43. Repo config file
/dev
[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
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
$ tar czvf home.tar.gz /home

44. Search for a package with firefox in the description
yum info firefox4
yum search firefox
insert as opposed to append
/usr/share/doc/initscripts-*/sysconfig.txt

45. Generate SSH Keys
/var/www/html/
ssh-keygen
#yum info [package name]
.spec

46. Authentication related messages log
updating the kernel
rsync /home root@server6.example.com:/tmp
/var/log/secure
ntpdate -b instructor

47. Restart the ntpd service
man search :/repository
#yum grouplist
service ntpd restart
#virsh list

48. Install the VNC server package
yum install tigervnc-server
ip masqu
palimpsest
/etc/ssh/sshd_config

49. Create a tar ball with gzip compression of the home dir
$ tar czvf home.tar.gz /home
# vi /etc/inittab change - id:3:initdefault:
cat >> some_file << _EOF
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

50. Restart ssh services
yum list
yum install firefox4
service sshd restart
vncpasswd

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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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