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RHCSA Commands

Subjects : certifications, it-skills, rhcsa

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Configuration for VNC
/var/log/messages
/etc/sysconfig/vncservers rpm -ql tigervnc-server
#rpm -qi [package name]
name-version-release.architecture.rpm

2. Install a pkg.rpm locally
rpm localinstall pkg.rpm --nogpgcheck
# yum
/var/log/secure
ntpdate -b instructor

3. Process packets coming into the system
yum remove firefox4
insert as opposed to append
IPtables input chain
GUI menu system/administratrion/firewall

4. Register on the RHN
/etc/sysconfig/iptables
rhn_register
chkconfig vsftpd on
cp /home/test1.html /var/www/html/test1.html

5. Search for command in the doc directory
# ls -l /usr/share/doc | grep httpd
ln -s /pub /var/www/html/pub
#rpm -ivh [package name]
/var/log/messages

6. Get more information on a package availale through yum
/var/log/messages
# yum
#yum info [package name]
/etc/yum.repos.d/

7. Start GUI for Firewall
2>&1
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
yum update
/var/log/secure

8. Show IP address with the IP command
name-version-release.architecture.rpm
/etc/ssh/sshd_config
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
#ip addr show

9. System config firewall
palimpsest
rpm -qc httpd
yum update
GUI menu system/administratrion/firewall

10. Contains RPM database
vsftpd
/var/lib/rpm
name-version-release.architecture.rpm
/etc/sysconfig/iptables

11. Search for a package within all packages
#rpm -qa | grep [package name]
/etc/sysconfig/network
add/remove software GUI
#ip addr show

12. FTP package used in RHEL 6
vsftpd
yum update
$ grep -v ^# /etc/nsswitch.conf
name-version-release.architecture.rpm

13. Redirect errors to std out
2>&1
#yum remove [package name]
/etc/rsyslog.conf
#rpm -qa | grep [package name]

14. 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 [email protected]:/var/pub
yum search firefox
rpm -qp pkg.rpm
2>&1

15. Create a symbolic link to /pub on the FTP and name it pub
add/remove software GUI
/var/log/cron
/var/www/html/
ln -s /pub /var/www/html/pub

16. Generate SSH Keys
IPtables forward chain
# star -xattr -H=exustar -c -f=home.star /home/
ssh-keygen
#yum groupinstall "group name"

17. List VMs
# cat /var/log/messages | grep [Ff]ailed | less
#virsh list
/etc/sysconfig/resolv.conf
#iptables -F

18. Edit files with cat until the _EOF is found
IPtables forward chain
[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
cat >> some_file << _EOF
/etc/sysconfig/network

19. Install the VNC server package
yum install tigervnc-server
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
Fully Qualified Domain Name
IPtables input chain

20. Display packages that match the pathname
yum provides
$ tar czvf home.tar.gz /home
/var/lib/rpm
vsftpd

21. Process packets being forwarded through the system
rpm -ql vsftpd
IPtables forward chain
/etc/sysconfig/network
name-version-release.architecture.rpm

22. Persist the web server on boot
chkconfig httpd on
/var/www/html/
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
rsync -PHR /home/test1.html [email protected]:/var/pub

23. Get a list of package groups from yum
rpm -ql vsftpd
/var/log/secure
/etc/sysconfig/vncservers rpm -ql tigervnc-server
#yum grouplist

24. Remove a package named firefox4
#rpm -qad [package name]
#iptables -D INPUT -p tcp --dport 21 -j accpet
man search :/repository
yum remove firefox4

25. Extract a star compressed file
rhn_register
#virsh list
rpm localinstall pkg.rpm --nogpgcheck
# star -x -f=home.star

26. Import a public key
rpm --import [public key location]
rsync -PHR /home/test1.html [email protected]:/var/pub
#uname -r
#yum install [package name]

27. Sync ntp time with the instructor
ntpdate -b instructor
rpm -qc httpd
rsync /home [email protected]:/tmp
tar cxtv

28. Email related messages log
/var/log/maillog
# vi /etc/inittab change - id:3:initdefault:
nautilus
tar cxtv

29. Create a gzip-compressed backup of /etc in /tmp
ssh-copy-id [email protected]
tar czvf /tmp/etc.tar.gz /etc
yum install tigervnc-server
yum info firefox4

30. Extract a gzipped tar ball in your home directory
cp /home/test1.html /var/www/html/test1.html
chkconfig httpd on
system-config-date
$ tar xzvf home.tar.gz /home

31. Program to analyze standard log files and send a summary email to root
logwatch
system-config-firewall tui
service sshd restart
#rpm -qi [package name]

32. Remote file copy /home/test1.html to the /var/pub directory on server6
rsync /home/test1.html [email protected]:/var/pub
/etc/sysconfig/iptables
ip masqu
service sshd restart

33. Shows network / global network variables: NETWORKING=yes HOSTNAME=shuttlehosti GATEWAY=192.168.88.1
/etc/sysconfig/network
#yum groupinstall "group name"
yum provides
/var/log/secure

34. See the configuration files installed with a package named httpd
yum search firefox
[email protected]
$ tar xzvf home.tar.gz /home
rpm -qc httpd

35. Stores IPtables rules (filter) chains - input forward output are persistant
IPtables output chain
/etc/sysconfig/iptables
rsync -PHR /home/test1.html [email protected]:/var/pub
/etc/sysconfig/network

36. Repos for yum
#yum remove [package name]
/etc/sysconfig/vncservers rpm -ql tigervnc-server
/etc/yum.repos.d
#iptables -D INPUT -p tcp --dport 21 -j accpet

37. Install the star compression tool create an archive with the star tool.
#yum install [package name]
add/remove software GUI
# star -xattr -H=exustar -c -f=home.star /home/
/etc/rsyslog.conf

38. Local host file (contains hostname). Can contain local system DNS.
insert as opposed to append
/etc/hosts
cp /home/test1.html /var/www/html/test1.html
#rpm -qac [package name]

39. Uninstall a package group with yum
logwatch
#yum groupremove "group name"
# star -x -f=home.star
system-config-date

40. List iptables
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
# grep -i
#iptables -L
nautilus

41. Restart the ntpd service
# vi /etc/inittab change - id:3:initdefault:
service ntpd restart
updating the kernel
/usr/share/doc/initscripts-*/sysconfig.txt

42. Copy a public ssh key to server6
/dev
rsync -PHR /home/test1.html [email protected]:/var/pub
ssh-copy-id [email protected]
#rpm -qi [package name]

43. List scripts that can be run after installation of pkg.rpm
#uname -r
vncviewer -via student@server6 localhost:2
rpm -q pkg.rpm --scripts
/etc/yum.repos.d

44. Acting as a router with forwarding
rsync -PHR /home/test1.html [email protected]:/var/pub
# renice -10 proc-id
ip masqu
service vncserver restart chkconfig vncserver on

45. Query configuration files with RPM
yum update
#rpm -uvh [package name]
updating the kernel
#rpm -qac [package name]

46. Grep with ignoring case
#virsh list
#virsh destroy domain-id
#yum groupremove "group name"
# grep -i

47. GUI install / uninstall with yum
/var/www/html/
yum list
add/remove software GUI
/etc/rsyslog.conf

48. Extract /tmp/etc.tar.gz to /etc
tar xvzf /tmp/etc.tar.gz /etc
service vncserver restart chkconfig vncserver on
IPtables input chain
rpm localinstall pkg.rpm --nogpgcheck

49. An example of searching through system logs with interpretation.
# virsh create /etc/libvert/qemu/vm_file_name.xml
# cat /var/log/messages | grep [Ff]ailed | less
/var/log/messages
rhn_register

50. Configuration file for system logs
yum update
/etc/rsyslog.conf
ssh-keygen
/etc/sysconfig/resolv.conf