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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. Send all debug level messages to /var/log/debug.log
*.debug /var/log/debug.log service rsyslog restart
/dev
/etc/sysconfig/resolv.conf
#rpm -qi [package name]

2. List VMs
#iptables -D INPUT -p tcp --dport 21 -j accpet
MailTo=student@server6.example.com
#virsh list
cp /home/test1.html /var/www/html/test1.html

3. Process packets coming into the system
# ls -l /usr/share/doc | grep httpd
yum remove firefox4
IPtables input chain
rhn_register

4. original DNS config file - still used
/etc/sysconfig/resolv.conf
#yum install [package name]
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
insert as opposed to append

5. Install a package with yum
/etc/services
# grep -i
rpm -qc httpd
#yum install [package name]

6. Disks available for partitions
logwatch
MailTo=student@server6.example.com
ntpdate -b instructor
/dev

7. Create a tar ball with gzip compression of the home dir
#yum info [package name]
$ tar czvf home.tar.gz /home
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
yum install firefox4

8. FTP package used in RHEL 6
# renice -10 proc-id
vsftpd
cp /home/test1.html /var/www/html/test1.html
vncpasswd

9. Program to analyze standard log files and send a summary email to root
#yum groupremove "group name"
logwatch
yum provides
/etc/yum.repos.d

10. Edit files with cat until the _EOF is found
cat >> some_file << _EOF
#rpm -qac [package name]
$ grep -v ^# /etc/nsswitch.conf
Fully Qualified Domain Name

11. Restart the ntpd service
service ntpd restart
ip masqu
/etc/sysconfig/iptables
rsync -PHR /home/test1.html root@server6.example.com:/var/pub

12. Search for command in the doc directory
chkconfig vsftpd on
# ls -l /usr/share/doc | grep httpd
chkconfig httpd on
tar fzj

13. Install with RPM
#yum
/etc/services
#rpm -ivh [package name]
/etc/yum.repos.d/

14. Contains RPM database
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
#yum
cp /home/test1.html /var/www/html/test1.html
/var/lib/rpm

15. Primary configuration of ssh
# vi /etc/inittab change - id:3:initdefault:
vsftpd restart
/etc/ssh/sshd_config
name-version-release.architecture.rpm

16. Process packets being forwarded through the system
#rpm -uvh [package name]
#yum info [package name]
tar fzj
IPtables forward chain

17. Local host file (contains hostname). Can contain local system DNS.
/etc/hosts
service ntpd restart
yum update
/etc/rsyslog.conf

18. Shell config tool gropued like GUI firewall configurater.
yum provides "*/sbin/sshd"
rsync /home root@server6.example.com:/tmp
2>&1
system-config-firewall tui

19. Query information files with RPM
#rpm -qi [package name]
# cat /var/log/messages | grep [Ff]ailed | less
/var/lib/rpm
#iptables -I INPUT -p tcp --dport 21 -j Accept

20. handles dependencies while RPMs do not uses preconfigured repos
#yum
yum provides
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
#iptables -D INPUT -p tcp --dport 21 -j accpet

21. Acting as a router with forwarding
ip masqu
vsftpd
ln -s /pub /var/www/html/pub
# yum

22. Remove a package with yum
vsftpd restart
#yum remove [package name]
#yum grouplist
.spec

23. Gets kernel version and release number
# grep -i
/etc/ssh/sshd_config
#uname -r
rsync /home/test1.html root@server6.example.com:/var/pub

24. Install the star compression tool create an archive with the star tool.
/var/log/cron
# star -xattr -H=exustar -c -f=home.star /home/
#ip addr show
yum info firefox4

25. Append add to the end of the IPtables rules. insert will put rule above the deny all rule.
rpm -qc httpd
#rpm -uvh [package name]
/etc/yum.repos.d/
insert as opposed to append

26. All messages sent at info priority or higher
Fully Qualified Domain Name
#yum
ip masqu
/var/log/messages

27. Install star
insert as opposed to append
# yum
rpm --import [public key location]
/etc/sysconfig/vncservers rpm -ql tigervnc-server

28. Restart vnc and persist on boot
system-config-firewall tui
cat >> some_file << _EOF
service vncserver restart chkconfig vncserver on
vsftpd restart

29. Flush the firewall of all rules
yum install firefox4
yum search firefox
#iptables -F
nautilus

30. Location of repo's
/etc/yum.repos.d/
vsftpd
[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
insert as opposed to append

31. Query all documentation with RPM
#rpm -qad [package name]
#iptables -L
/etc/yum.repos.d/
# ls -l /usr/share/doc | grep httpd

32. Redirect errors to std out
2>&1
# star -x -f=home.star
yum install tigervnc-server
#virsh destroy domain-id

33. See files installed with a package named vsftpd
system-config-date
#yum install [package name]
rpm -ql vsftpd
rpm --import [public key location]

34. Extract a gzipped tar ball in your home directory
#iptables -F
$ tar xzvf home.tar.gz /home
/var/www/html/
# yum

35. List iptables
rpm localinstall pkg.rpm --nogpgcheck
#iptables -L
/var/log/secure
ln -s /pub /var/www/html/pub

36. Copy a public ssh key to server6
*.debug /var/log/debug.log service rsyslog restart
ssh-copy-id root@server6.example.com
/etc/sysconfig/iptables
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)

37. tar options for create - extract - test - and verbose
#yum grouplist
rsync -PHR /home/test1.html root@server6.example.com:/var/pub
tar cxtv
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

38. Backup a home directory on desktop6 to /tmp on server6
rsync /home root@server6.example.com:/tmp
#yum
# cat /var/log/messages | grep [Ff]ailed | less
/var/log/messages

39. Stores IPtables rules (filter) chains - input forward output are persistant
/etc/sysconfig/iptables
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
insert as opposed to append
service vncserver restart chkconfig vncserver on

40. Get more information on a package availale through yum
#uname -r
tar czvf /tmp/etc.tar.gz /etc
#yum info [package name]
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)

41. Shows network / global network variables: NETWORKING=yes HOSTNAME=shuttlehosti GATEWAY=192.168.88.1
/etc/sysconfig/network
tar czvf /tmp/etc.tar.gz /etc
vsftpd restart
chkconfig vsftpd on

42. Delete a rule from iptables
cat >> some_file << _EOF
ssh-keygen
yum install tigervnc-server
#iptables -D INPUT -p tcp --dport 21 -j accpet

43. Should be done with yum and install as opposed to update if done with RPM option "i" should be used and not "u"
chkconfig vsftpd on
system-config-date
updating the kernel
# vi /etc/inittab change - id:3:initdefault:

44. Email related messages log
yum update
yum info firefox4
#iptables -L
/var/log/maillog

45. Extract a star compressed file
.spec
$ grep -v ^# /etc/nsswitch.conf
/var/lib/rpm
# star -x -f=home.star

46. Get information about a package named firefox4
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd
/etc/services
yum info firefox4
/etc/sysconfig/network

47. Create a gzip-compressed backup of /etc in /tmp
# virsh create /etc/libvert/qemu/vm_file_name.xml
tar czvf /tmp/etc.tar.gz /etc
yum provides "*/sbin/sshd"
#yum

48. Where are HTML pages hosted?
tar czvf /tmp/etc.tar.gz /etc
/var/www/html/
/etc/ssh/sshd_config
/etc/yum.repos.d/

49. Install the VNC server package
yum install tigervnc-server
/var/log/messages
system-config-date
vsftpd restart

50. Repo config file
yum info firefox4
ip masqu
[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
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

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Can you answer 50 questions in 15 minutes?

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RHCSA Commands

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