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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. Query information files with RPM
#yum install [package name]
/etc/sysconfig/network
yum list
#rpm -qi [package name]

2. Process packets being forwarded through the system
#yum groupremove "group name"
2>&1
/var/log/messages
IPtables forward chain

3. Grep for lines that do not match (-v)
Fully Qualified Domain Name
#virsh destroy domain-id
[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
$ grep -v ^# /etc/nsswitch.conf

4. Kill a VM
#ip addr show
$ grep -v ^# /etc/nsswitch.conf
# yum
#virsh destroy domain-id

5. Package file named pkg.rpm
# vi /etc/inittab change - id:3:initdefault:
rpm localinstall pkg.rpm --nogpgcheck
rpm -qp pkg.rpm
/usr/share/doc/initscripts-*/sysconfig.txt

6. Install the VNC server package
yum remove firefox4
yum install tigervnc-server
# yum
vncviewer -via student@server6 localhost:2

7. Extract a star compressed file
MailTo=student@server6.example.com
/etc/ssh/sshd_config
man search :/repository
# star -x -f=home.star

8. Search for command in the doc directory
# ls -l /usr/share/doc | grep httpd
*.debug /var/log/debug.log service rsyslog restart
#iptables -L
/etc/sysconfig/resolv.conf

9. File holding services - ports - protocols assoicated
chkconfig httpd on
# star -xattr -H=exustar -c -f=home.star /home/
cp /home/test1.html /var/www/html/test1.html
/etc/services

10. Shows network / global network variables: NETWORKING=yes HOSTNAME=shuttlehosti GATEWAY=192.168.88.1
rpm -qp pkg.rpm
MailTo=student@server6.example.com
/etc/sysconfig/network
#virsh destroy domain-id

11. RPM package naming
name-version-release.architecture.rpm
/etc/ssh/sshd_config
rsync /home/test1.html root@server6.example.com:/var/pub
IPtables forward chain

12. Should be done with yum and install as opposed to update if done with RPM option "i" should be used and not "u"
chkconfig httpd on
ip masqu
add/remove software GUI
updating the kernel

13. 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]
rpm -ql vsftpd
#ip addr show

14. fqdn
Fully Qualified Domain Name
yum update
#rpm -uvh [package name]
ntpdate -b instructor

15. System config firewall
/var/www/html/
#yum groupinstall "group name"
#yum
GUI menu system/administratrion/firewall

16. Searches for page within the #man yum
#virsh destroy domain-id
man search :/repository
#rpm -qa | grep [package name]
# cat /var/log/messages | grep [Ff]ailed | less

17. Process packets coming out of the system
tar xvzf /tmp/etc.tar.gz /etc
IPtables output chain
#iptables -F
#yum info [package name]

18. tar options for file name - gzip - and bzip2
# yum
/var/www/html/
rpm -q pkg.rpm --scripts
tar fzj

19. List installed and available packages
#rpm -qac [package name]
ssh-copy-id root@server6.example.com
yum list
# ls -l /usr/share/doc | grep httpd

20. Start vsftp service
/etc/yum.repos.d/
#yum remove [package name]
vsftpd restart
yum remove firefox4

21. Remove a package with yum
#yum remove [package name]
/var/lib/rpm
#yum info [package name]
rsync -a /home/test1.html root@server6.example.com:/var/pub

22. Configuration for VNC
cat >> some_file << _EOF
/etc/sysconfig/vncservers rpm -ql tigervnc-server
system-config-firewall tui
rpm -qc httpd

23. original DNS config file - still used
#yum install [package name]
/etc/sysconfig/resolv.conf
#iptables -I INPUT -p tcp --dport 21 -j Accept
/var/log/maillog

24. Restart vnc and persist on boot
rpm -q pkg.rpm --scripts
palimpsest
service vncserver restart chkconfig vncserver on
add/remove software GUI

25. Append this to the /etc/rsyslog.conf to send mail to student@server6.example.com
MailTo=student@server6.example.com
add/remove software GUI
yum list
yum provides

26. Create a gzip-compressed backup of /etc in /tmp
tar czvf /tmp/etc.tar.gz /etc
/etc/hosts
/etc/sysconfig/iptables
#rpm -uvh [package name]

27. Repos for yum
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
/var/log/maillog
/etc/sysconfig/iptables
/etc/yum.repos.d

28. Remote copy /home/test1.html to the /var/pub directory on server6 with progress - preserving hard links - and using relative path names
yum info firefox4
# star -x -f=home.star
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
#rpm -qac [package name]

29. GUI install / uninstall with yum
add/remove software GUI
/var/log/maillog
/var/log/cron
/var/log/secure

30. Local host file (contains hostname). Can contain local system DNS.
rpm -q pkg.rpm --scripts
/etc/hosts
# cat /var/log/messages | grep [Ff]ailed | less
# virsh create /etc/libvert/qemu/vm_file_name.xml

31. Start a VM
updating the kernel
/var/log/maillog
# virsh create /etc/libvert/qemu/vm_file_name.xml
man search :/repository

32. Enable anonymous users - disable local accounts - and disable any uploads to the FTP server
ip masqu
#iptables -I INPUT -p tcp --dport 21 -j Accept
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
/etc/services

33. Adjust the persistent runlevel
# vi /etc/inittab change - id:3:initdefault:
/etc/hosts
#iptables -D INPUT -p tcp --dport 21 -j accpet
service sshd restart

34. handles dependencies while RPMs do not uses preconfigured repos
nautilus
Fully Qualified Domain Name
#yum
# yum

35. Email related messages log
/var/log/maillog
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
ip masqu
rpm -ql vsftpd

36. GUI File Manager
yum install tigervnc-server
/etc/ssh/sshd_config
nautilus
#iptables -I INPUT -p tcp --dport 21 -j Accept

37. Get information about a package named firefox4
ssh-copy-id root@server6.example.com
yum info firefox4
/etc/services
/usr/share/doc/initscripts-*/sysconfig.txt

38. Install star
ntpdate -b instructor
#yum groupinstall "group name"
$ tar czvf home.tar.gz /home
# yum

39. Delete a rule from iptables
#yum groupremove "group name"
#rpm -ivh [package name]
$ grep -v ^# /etc/nsswitch.conf
#iptables -D INPUT -p tcp --dport 21 -j accpet

40. Authentication related messages log
rpm -qp pkg.rpm
/var/log/secure
#yum install [package name]
chkconfig vsftpd on

41. Append add to the end of the IPtables rules. insert will put rule above the deny all rule.
insert as opposed to append
tar czvf /tmp/etc.tar.gz /etc
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
#virsh destroy domain-id

42. List scripts that can be run after installation of pkg.rpm
/etc/services
rpm -q pkg.rpm --scripts
ip masqu
#rpm -qa | grep [package name]

43. See files installed with a package named vsftpd
# ls -l /usr/share/doc | grep httpd
# renice -10 proc-id
yum provides "*/sbin/sshd"
rpm -ql vsftpd

44. FTP package used in RHEL 6
GUI menu system/administratrion/firewall
nautilus
vsftpd
/etc/yum.repos.d

45. Messages related to cron log
/var/log/cron
tar fzj
yum provides
#ip addr show

46. Sync ntp time with the instructor
ntpdate -b instructor
/etc/ssh/sshd_config
$ tar xzvf home.tar.gz /home
tar czvf /tmp/etc.tar.gz /etc

47. Extract a gzipped tar ball in your home directory
IPtables input chain
man search :/repository
/var/lib/rpm
$ tar xzvf home.tar.gz /home

48. Install a package group with yum
#iptables -I INPUT -p tcp --dport 21 -j Accept
# renice -10 proc-id
#yum groupinstall "group name"
ln -s /pub /var/www/html/pub

49. Install the star compression tool create an archive with the star tool.
ip masqu
# star -xattr -H=exustar -c -f=home.star /home/
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
yum info firefox4

50. Start GUI for Firewall
palimpsest
updating the kernel
$ tar czvf home.tar.gz /home
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)

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Can you answer 50 questions in 15 minutes?

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RHCSA Commands

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