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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.
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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 with yum
#yum remove [package name]
man search :/repository
system-config-date
*.debug /var/log/debug.log service rsyslog restart

2. Install a package group with yum
updating the kernel
#yum groupinstall "group name"
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
rpm -ql vsftpd

3. Create a symbolic link to /pub on the FTP and name it pub
yum info firefox4
ln -s /pub /var/www/html/pub
# grep -i
IPtables forward chain

4. Stores IPtables rules (filter) chains - input forward output are persistant
# star -x -f=home.star
/etc/sysconfig/iptables
/var/www/html/
tar cxtv

5. Update a package
IPtables forward chain
rsync -a /home/test1.html root@server6.example.com:/var/pub
service ntpd restart
yum update

6. Documentation about sysconfig network scripts
yum provides
$ grep -v ^# /etc/nsswitch.conf
ln -s /pub /var/www/html/pub
/usr/share/doc/initscripts-*/sysconfig.txt

7. Query all documentation with RPM
#rpm -qad [package name]
# yum
/etc/yum.repos.d
ntpdate -b instructor

8. Search for a package with firefox in the description
yum search firefox
/var/log/cron
/var/log/maillog
yum install tigervnc-server

9. Extract a star compressed file
# star -x -f=home.star
nautilus
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
/etc/services

10. Show IP address with the IP command
yum info firefox4
#rpm -qa | grep [package name]
add/remove software GUI
#ip addr show

11. Where are HTML pages hosted?
#yum info [package name]
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
/var/www/html/
#rpm -qa | grep [package name]

12. Install star
# yum
$ tar czvf home.tar.gz /home
IPtables forward chain
yum install tigervnc-server

13. Process packets coming into the system
IPtables input chain
# vi /etc/inittab change - id:3:initdefault:
#iptables -F
/etc/services

14. Get a list of package groups from yum
#uname -r
MailTo=student@server6.example.com
#yum
#yum grouplist

15. Uninstall a package group with yum
vncpasswd
tar czvf /tmp/etc.tar.gz /etc
rpm -ql vsftpd
#yum groupremove "group name"

16. Gets kernel version and release number
service sshd restart
$ tar czvf home.tar.gz /home
#uname -r
rpm -qp pkg.rpm

17. Determine which package provides SSH
yum provides "*/sbin/sshd"
#virsh destroy domain-id
logwatch
# ls -l /usr/share/doc | grep httpd

18. Grep for lines that do not match (-v)
$ grep -v ^# /etc/nsswitch.conf
insert as opposed to append
palimpsest
#rpm -uvh [package name]

19. Create a gzip-compressed backup of /etc in /tmp
/etc/sysconfig/network
#rpm -qad [package name]
tar czvf /tmp/etc.tar.gz /etc
ssh-copy-id root@server6.example.com

20. Should be done with yum and install as opposed to update if done with RPM option "i" should be used and not "u"
updating the kernel
tar czvf /tmp/etc.tar.gz /etc
$ tar czvf home.tar.gz /home
#rpm -uvh [package name]

21. Use lftp to connect
rpm -q pkg.rpm --scripts
ssh-copy-id root@server6.example.com
IPtables input chain
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

22. Query information files with RPM
chkconfig vsftpd on
ssh-copy-id root@server6.example.com
#rpm -qi [package name]
rsync -a /home/test1.html root@server6.example.com:/var/pub

23. File holding services - ports - protocols assoicated
rpm -ql vsftpd
service sshd restart
#virsh list
/etc/services

24. Edit files with cat until the _EOF is found
#iptables -D INPUT -p tcp --dport 21 -j accpet
rsync /home root@server6.example.com:/tmp
ntpdate -b instructor
cat >> some_file << _EOF

25. Create a tar ball with gzip compression of the home dir
rpm -ql vsftpd
name-version-release.architecture.rpm
$ tar czvf home.tar.gz /home
.spec

26. Basic add rule for iptables not persistant unless saved with #/etc/init.d/iptables save
cat >> some_file << _EOF
#iptables -I INPUT -p tcp --dport 21 -j Accept
vncviewer -via student@server6 localhost:2
/etc/hosts

27. tar options for create - extract - test - and verbose
# star -xattr -H=exustar -c -f=home.star /home/
tar cxtv
nautilus
#rpm -qad [package name]

28. original DNS config file - still used
rpm -qp pkg.rpm
[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
/etc/sysconfig/resolv.conf
/etc/yum.repos.d/

29. Restart ssh services
service sshd restart
/etc/yum.repos.d
rsync /home root@server6.example.com:/tmp
tar xvzf /tmp/etc.tar.gz /etc

30. Local host file (contains hostname). Can contain local system DNS.
/etc/hosts
name-version-release.architecture.rpm
# cat /var/log/messages | grep [Ff]ailed | less
/usr/share/doc/initscripts-*/sysconfig.txt

31. Email related messages log
yum remove firefox4
/etc/yum.repos.d/
IPtables forward chain
/var/log/maillog

32. Install the VNC server package
yum install tigervnc-server
chkconfig httpd on
2>&1
man search :/repository

33. Package file named pkg.rpm
#iptables -L
system-config-date
rsync /home root@server6.example.com:/tmp
rpm -qp pkg.rpm

34. Shows network / global network variables: NETWORKING=yes HOSTNAME=shuttlehosti GATEWAY=192.168.88.1
vsftpd
/etc/sysconfig/iptables
/etc/sysconfig/network
#rpm -ivh [package name]

35. Start the GUI for date configuration
yum install tigervnc-server
#ip addr show
system-config-date
# cat /var/log/messages | grep [Ff]ailed | less

36. Import a public key
# renice -10 proc-id
yum update
#rpm -qi [package name]
rpm --import [public key location]

37. Primary configuration of ssh
chkconfig vsftpd on
ssh-keygen
*.debug /var/log/debug.log service rsyslog restart
/etc/ssh/sshd_config

38. GUI File Manager
#rpm -uvh [package name]
system-config-date
/etc/sysconfig/vncservers rpm -ql tigervnc-server
nautilus

39. Local file copy of /home/test1.html to /var/www/html/test1.html
service sshd restart
cp /home/test1.html /var/www/html/test1.html
vncviewer -via student@server6 localhost:2
#rpm -qa | grep [package name]

40. RPM package naming
system-config-date
name-version-release.architecture.rpm
man search :/repository
IPtables forward chain

41. Shell config tool gropued like GUI firewall configurater.
# virsh create /etc/libvert/qemu/vm_file_name.xml
system-config-firewall tui
#yum groupremove "group name"
.spec

42. Send all debug level messages to /var/log/debug.log
/var/log/maillog
yum provides "*/sbin/sshd"
*.debug /var/log/debug.log service rsyslog restart
/etc/services

43. tar options for file name - gzip - and bzip2
rpm -qc httpd
system-config-firewall tui
name-version-release.architecture.rpm
tar fzj

44. Register on the RHN
vncviewer -via student@server6 localhost:2
rsync /home/test1.html root@server6.example.com:/var/pub
# star -x -f=home.star
rhn_register

45. Configuration file for system logs
/var/lib/rpm
GUI menu system/administratrion/firewall
#iptables -F
/etc/rsyslog.conf

46. Restart the ntpd service
#yum
nautilus
service ntpd restart
#rpm -qac [package name]

47. Contains RPM database
GUI menu system/administratrion/firewall
/var/lib/rpm
#iptables -F
#ip addr show

48. Disks available for partitions
/dev
# yum
rpm -ql vsftpd
man search :/repository

49. Stores filewall rules for the system.
#yum install [package name]
rsync /home root@server6.example.com:/tmp
tar xvzf /tmp/etc.tar.gz /etc
/etc/sysconfig/iptables

50. Kill a VM
/var/log/cron
#virsh destroy domain-id
/etc/yum.repos.d
ssh-keygen

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Can you answer 50 questions in 15 minutes?

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RHCSA Commands

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