Test your basic knowledge |

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. Uninstall a package group with yum
man search :/repository
$ grep -v ^# /etc/nsswitch.conf
#yum groupremove "group name"
#yum remove [package name]

2. Set process priority with renice - -20 highest - 20 lowest - 0 is default
/etc/yum.repos.d/
$ grep -v ^# /etc/nsswitch.conf
# renice -10 proc-id
yum search firefox

3. fqdn
/usr/share/doc/initscripts-*/sysconfig.txt
#ip addr show
Fully Qualified Domain Name
system-config-firewall tui

4. Get information about a package named firefox4
yum remove firefox4
# ls -l /usr/share/doc | grep httpd
yum info firefox4
ln -s /pub /var/www/html/pub

5. Persist the web server on boot
chkconfig httpd on
#iptables -F
# renice -10 proc-id
rpm --import [public key location]

6. Disks available for partitions
/dev
rsync /home root@server6.example.com:/tmp
# ls -l /usr/share/doc | grep httpd
#yum remove [package name]

7. All messages sent at info priority or higher
/etc/sysconfig/iptables
/var/log/messages
yum provides "*/sbin/sshd"
#yum remove [package name]

8. Restart the ntpd service
/etc/rsyslog.conf
$ tar xzvf home.tar.gz /home
rsync /home/test1.html root@server6.example.com:/var/pub
service ntpd restart

9. Show IP address with the IP command
rpm --import [public key location]
rsync -a /home/test1.html root@server6.example.com:/var/pub
#ip addr show
chkconfig httpd on

10. Persist FTP on boot
#yum install [package name]
2>&1
/etc/sysconfig/iptables
chkconfig vsftpd on

11. handles dependencies while RPMs do not uses preconfigured repos
#yum
/etc/sysconfig/network
add/remove software GUI
/etc/hosts

12. Search for command in the doc directory
/var/log/messages
ssh-copy-id root@server6.example.com
# ls -l /usr/share/doc | grep httpd
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd

13. Install the star compression tool create an archive with the star tool.
# star -xattr -H=exustar -c -f=home.star /home/
ssh-keygen
yum install tigervnc-server
IPtables forward chain

14. Remote file copy /home/test1.html to the /var/pub directory on server6
cp /home/test1.html /var/www/html/test1.html
rpm -qc httpd
rpm -ql vsftpd
rsync /home/test1.html root@server6.example.com:/var/pub

15. Search for a package within all packages
vsftpd restart
.spec
/etc/sysconfig/iptables
#rpm -qa | grep [package name]

16. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
add/remove software GUI
ssh-keygen
#iptables -I INPUT -p tcp --dport 21 -j Accept
rpm -ql vsftpd

17. Query configuration files with RPM
#rpm -qac [package name]
#yum
insert as opposed to append
/var/www/html/

18. Process packets coming into the system
yum search firefox
yum install firefox4
/var/log/maillog
IPtables input chain

19. Start the GUI for date configuration
#yum install [package name]
system-config-firewall tui
#rpm -qac [package name]
system-config-date

20. File holding services - ports - protocols assoicated
/var/www/html/
/etc/services
#yum
# star -xattr -H=exustar -c -f=home.star /home/

21. List VMs
/var/lib/rpm
/etc/yum.repos.d
yum install firefox4
#virsh list

22. Remove a package with yum
yum remove firefox4
yum provides "*/sbin/sshd"
#yum remove [package name]
#yum install [package name]

23. Send all debug level messages to /var/log/debug.log
palimpsest
*.debug /var/log/debug.log service rsyslog restart
tar czvf /tmp/etc.tar.gz /etc
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

24. Contains RPM database
/var/lib/rpm
$ tar xzvf home.tar.gz /home
ntpdate -b instructor
tar cxtv

25. Install star
#rpm -qad [package name]
yum install tigervnc-server
# yum
vsftpd

26. Rpm upgrade package u upgrade v verbose h hash
#yum info [package name]
#rpm -uvh [package name]
/var/log/maillog
/dev

27. Extract /tmp/etc.tar.gz to /etc
*.debug /var/log/debug.log service rsyslog restart
/var/log/cron
tar xvzf /tmp/etc.tar.gz /etc
#rpm -qac [package name]

28. Repos for yum
#yum install [package name]
/etc/yum.repos.d
tar xvzf /tmp/etc.tar.gz /etc
vncpasswd

29. Grep for lines that do not match (-v)
/var/www/html/
$ grep -v ^# /etc/nsswitch.conf
tar czvf /tmp/etc.tar.gz /etc
rpm --import [public key location]

30. Append add to the end of the IPtables rules. insert will put rule above the deny all rule.
#yum install [package name]
yum install tigervnc-server
/var/www/html/
insert as opposed to append

31. Get more information on a package availale through yum
#yum info [package name]
yum info firefox4
rpm --import [public key location]
/etc/hosts

32. Redirect errors to std out
rpm -ql vsftpd
tar cxtv
2>&1
yum install tigervnc-server

33. Update a package
/usr/share/doc/initscripts-*/sysconfig.txt
yum update
rpm localinstall pkg.rpm --nogpgcheck
# ls -l /usr/share/doc | grep httpd

34. FTP package used in RHEL 6
/var/log/cron
vsftpd
/var/www/html/
$ grep -v ^# /etc/nsswitch.conf

35. List installed and available packages
#iptables -I INPUT -p tcp --dport 21 -j Accept
yum list
/etc/sysconfig/vncservers rpm -ql tigervnc-server
#ip addr show

36. Display packages that match the pathname
yum provides
add/remove software GUI
IPtables input chain
rhn_register

37. Create a symbolic link to /pub on the FTP and name it pub
system-config-firewall tui
ln -s /pub /var/www/html/pub
$ tar czvf home.tar.gz /home
add/remove software GUI

38. Repo config file
[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
nautilus
/dev
vsftpd restart

39. Determine which package provides SSH
yum info firefox4
nautilus
yum provides "*/sbin/sshd"
vncviewer -via student@server6 localhost:2

40. Edit files with cat until the _EOF is found
cat >> some_file << _EOF
vncviewer -via student@server6 localhost:2
# renice -10 proc-id
name-version-release.architecture.rpm

41. Create a gzip-compressed backup of /etc in /tmp
#yum grouplist
#ip addr show
# ls -l /usr/share/doc | grep httpd
tar czvf /tmp/etc.tar.gz /etc

42. Local host file (contains hostname). Can contain local system DNS.
yum install firefox4
#iptables -I INPUT -p tcp --dport 21 -j Accept
/etc/hosts
chkconfig vsftpd on

43. Gets kernel version and release number
#rpm -qad [package name]
tar xvzf /tmp/etc.tar.gz /etc
#uname -r
/var/lib/rpm

44. System config firewall
/usr/share/doc/initscripts-*/sysconfig.txt
yum install tigervnc-server
GUI menu system/administratrion/firewall
vncpasswd

45. Kill a VM
yum info firefox4
#virsh destroy domain-id
#rpm -qa | grep [package name]
#yum info [package name]

46. Configuration for VNC
/etc/sysconfig/vncservers rpm -ql tigervnc-server
vsftpd restart
/var/log/maillog
#rpm -qac [package name]

47. original DNS config file - still used
rpm localinstall pkg.rpm --nogpgcheck
yum search firefox
/etc/sysconfig/resolv.conf
name-version-release.architecture.rpm

48. Backup a home directory on desktop6 to /tmp on server6
rsync /home root@server6.example.com:/tmp
add/remove software GUI
ip masqu
#yum

49. Connect with VNC viewer securely
#ip addr show
vncviewer -via student@server6 localhost:2
# yum
yum remove firefox4

50. Restart ssh services
service sshd restart
#yum groupremove "group name"
man search :/repository
cp /home/test1.html /var/www/html/test1.html