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RHCSA Commands

Subjects : certifications, it-skills, rhcsa

Instructions:

Answer 50 questions in 15 minutes.
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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. Remove a package named firefox4
yum search firefox
yum provides
/etc/sysconfig/network
yum remove firefox4

2. tar options for file name - gzip - and bzip2
#yum install [package name]
#uname -r
tar fzj
/etc/sysconfig/iptables

3. List VMs
/etc/services
#virsh list
2>&1
Fully Qualified Domain Name

4. Stores filewall rules for the system.
#rpm -ivh [package name]
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
rpm -ql vsftpd
/etc/sysconfig/iptables

5. tar options for create - extract - test - and verbose
#uname -r
yum provides
tar cxtv
/etc/yum.repos.d/

6. Query all documentation with RPM
rsync /home root@server6.example.com:/tmp
#rpm -qad [package name]
/etc/sysconfig/network
#yum install [package name]

7. Should be done with yum and install as opposed to update if done with RPM option "i" should be used and not "u"
/usr/share/doc/initscripts-*/sysconfig.txt
updating the kernel
tar xvzf /tmp/etc.tar.gz /etc
#rpm -qad [package name]

8. Install a package with yum
#iptables -L
#yum install [package name]
# star -x -f=home.star
palimpsest

9. Shell config tool gropued like GUI firewall configurater.
2>&1
palimpsest
chkconfig vsftpd on
system-config-firewall tui

10. Restart ssh services
service sshd restart
ntpdate -b instructor
# yum
rhn_register

11. Append add to the end of the IPtables rules. insert will put rule above the deny all rule.
# renice -10 proc-id
insert as opposed to append
/etc/services
$ tar czvf home.tar.gz /home

12. Get more information on a package availale through yum
#rpm -qad [package name]
$ tar xzvf home.tar.gz /home
#yum info [package name]
palimpsest

13. Remote copy /home/test1.html to the /var/pub directory on server6 with progress - preserving hard links - and using relative path names
#rpm -qa | grep [package name]
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
ln -s /pub /var/www/html/pub
#rpm -uvh [package name]

14. Extract a star compressed file
# grep -i
palimpsest
# star -x -f=home.star
man search :/repository

15. original DNS config file - still used
/dev
/etc/sysconfig/resolv.conf
/var/www/html/
system-config-date

16. Generate SSH Keys
service ntpd restart
rpm -qc httpd
ssh-keygen
/var/log/maillog

17. Repo config file
/var/log/messages
[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
yum install tigervnc-server
vsftpd

18. Configuration file for system logs
ln -s /pub /var/www/html/pub
ssh-copy-id root@server6.example.com
#virsh destroy domain-id
/etc/rsyslog.conf

19. Start the GUI for date configuration
/etc/rsyslog.conf
system-config-date
# renice -10 proc-id
/etc/sysconfig/vncservers rpm -ql tigervnc-server

20. Start GUI for Firewall
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
rsync /home root@server6.example.com:/tmp
rhn_register
#rpm -qa | grep [package name]

21. Connect with VNC viewer securely
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
vncviewer -via student@server6 localhost:2
/var/lib/rpm
yum install firefox4

22. Determine which package provides SSH
#rpm -qac [package name]
yum provides "*/sbin/sshd"
# star -xattr -H=exustar -c -f=home.star /home/
/var/log/secure

23. See the configuration files installed with a package named httpd
/var/log/cron
cat >> some_file << _EOF
rpm -qc httpd
ssh-copy-id root@server6.example.com

24. GUI File Manager
#uname -r
# ls -l /usr/share/doc | grep httpd
nautilus
# yum

25. Sync ntp time with the instructor
#iptables -L
#rpm -qi [package name]
ntpdate -b instructor
#ip addr show

26. Install a pkg.rpm locally
.spec
yum info firefox4
/dev
rpm localinstall pkg.rpm --nogpgcheck

27. Grep with ignoring case
# grep -i
service ntpd restart
rsync -a /home/test1.html root@server6.example.com:/var/pub
IPtables output chain

28. Persist FTP on boot
rpm --import [public key location]
chkconfig vsftpd on
logwatch
yum provides

29. Search for command in the doc directory
ssh-keygen
#rpm -qi [package name]
service sshd restart
# ls -l /usr/share/doc | grep httpd

30. Package file named pkg.rpm
rpm -qp pkg.rpm
#rpm -uvh [package name]
yum provides
#yum remove [package name]

31. Install with RPM
#iptables -F
/var/www/html/
IPtables forward chain
#rpm -ivh [package name]

32. Flush the firewall of all rules
[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
#iptables -F
yum list
/etc/services

33. Grep for lines that do not match (-v)
/var/log/cron
logwatch
$ grep -v ^# /etc/nsswitch.conf
/etc/yum.repos.d

34. Email related messages log
/var/log/maillog
rpm --import [public key location]
.spec
#rpm -qad [package name]

35. Process packets coming into the system
rpm --import [public key location]
$ tar xzvf home.tar.gz /home
/etc/sysconfig/network
IPtables input chain

36. Local file copy of /home/test1.html to /var/www/html/test1.html
#iptables -D INPUT -p tcp --dport 21 -j accpet
#yum grouplist
cp /home/test1.html /var/www/html/test1.html
#iptables -I INPUT -p tcp --dport 21 -j Accept

37. Redirect errors to std out
rpm -q pkg.rpm --scripts
updating the kernel
yum remove firefox4
2>&1

38. Where are HTML pages hosted?
/etc/sysconfig/network
rpm -ql vsftpd
/var/www/html/
yum remove firefox4

39. Install star
# yum
name-version-release.architecture.rpm
#ip addr show
/usr/share/doc/initscripts-*/sysconfig.txt

40. Copy a public ssh key to server6
ssh-copy-id root@server6.example.com
rpm --import [public key location]
# vi /etc/inittab change - id:3:initdefault:
/etc/rsyslog.conf

41. List installed and available packages
yum list
#yum install [package name]
#rpm -qi [package name]
IPtables forward chain

42. Install a package named firefox4
ssh-keygen
yum install firefox4
/var/www/html/
/var/lib/rpm

43. Kill a VM
#yum grouplist
rhn_register
#virsh destroy domain-id
rsync -a /home/test1.html root@server6.example.com:/var/pub

44. Show IP address with the IP command
#rpm -uvh [package name]
#ip addr show
#yum groupremove "group name"
/etc/services

45. Send all debug level messages to /var/log/debug.log
/var/lib/rpm
*.debug /var/log/debug.log service rsyslog restart
/etc/ssh/sshd_config
#virsh list

46. Program to analyze standard log files and send a summary email to root
yum provides
#iptables -D INPUT -p tcp --dport 21 -j accpet
logwatch
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd

47. Import a public key
#yum
service vncserver restart chkconfig vncserver on
/dev
rpm --import [public key location]

48. Location of repo's
/etc/yum.repos.d/
*.debug /var/log/debug.log service rsyslog restart
rpm --import [public key location]
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

49. Start a VM
IPtables input chain
rpm -qp pkg.rpm
# virsh create /etc/libvert/qemu/vm_file_name.xml
/etc/services

50. List iptables
/etc/hosts
#yum groupremove "group name"
vncpasswd
#iptables -L

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Can you answer 50 questions in 15 minutes?

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RHCSA Commands

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