Test your basic knowledge |

RHCSA Commands

Subjects : certifications, it-skills, rhcsa

Instructions:

Answer 50 questions in 15 minutes.
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1. File containing information to create rpm package - RPM packages contain these files: libraries or application - any documentation - any configuration files
.spec
rpm --import [public key location]
#yum info [package name]
#iptables -L

2. Restart vnc and persist on boot
service vncserver restart chkconfig vncserver on
rpm localinstall pkg.rpm --nogpgcheck
yum info firefox4
# yum

3. Create a gzip-compressed backup of /etc in /tmp
add/remove software GUI
tar czvf /tmp/etc.tar.gz /etc
#iptables -I INPUT -p tcp --dport 21 -j Accept
updating the kernel

4. List iptables
rpm -ql vsftpd
#iptables -L
#rpm -qac [package name]
/etc/yum.repos.d

5. Disks available for partitions
/var/log/messages
#yum remove [package name]
/dev
# renice -10 proc-id

6. Stores IPtables rules (filter) chains - input forward output are persistant
/etc/sysconfig/vncservers rpm -ql tigervnc-server
yum provides
ln -s /pub /var/www/html/pub
/etc/sysconfig/iptables

7. Enable anonymous users - disable local accounts - and disable any uploads to the FTP server
/etc/sysconfig/iptables
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
#iptables -F
#virsh destroy domain-id

8. Delete a rule from iptables
#iptables -D INPUT -p tcp --dport 21 -j accpet
vsftpd
yum provides "*/sbin/sshd"
#rpm -ivh [package name]

9. Email related messages log
/var/log/maillog
ntpdate -b instructor
service ntpd restart
lftp student@server6 httpd configuration /etc/httpd/conf/httpd.conf rpm -ql httpd

10. GUI File Manager
rpm -q pkg.rpm --scripts
/etc/sysconfig/iptables
nautilus
yum remove firefox4

11. Create a tar ball with gzip compression of the home dir
$ tar czvf home.tar.gz /home
#yum remove [package name]
# yum
#iptables -D INPUT -p tcp --dport 21 -j accpet

12. Determine which package provides SSH
/etc/vsftpd/vsftpd.conf rpm -ql vsftpd
vsftpd restart
chkconfig vsftpd on
yum provides "*/sbin/sshd"

13. Remote file copy /home/test1.html to the /var/pub directory on server6 while preserving metadata
rsync -a /home/test1.html root@server6.example.com:/var/pub
#yum info [package name]
$ tar czvf home.tar.gz /home
#uname -r

14. Extract /tmp/etc.tar.gz to /etc
# ls -l /usr/share/doc | grep httpd
yum install tigervnc-server
tar xvzf /tmp/etc.tar.gz /etc
updating the kernel

15. Install the star compression tool create an archive with the star tool.
# virsh create /etc/libvert/qemu/vm_file_name.xml
vncpasswd
# star -xattr -H=exustar -c -f=home.star /home/
insert as opposed to append

16. Install a package with yum
#yum install [package name]
#iptables -D INPUT -p tcp --dport 21 -j accpet
IPtables output chain
ip masqu

17. Remote file copy /home/test1.html to the /var/pub directory on server6
rsync /home/test1.html root@server6.example.com:/var/pub
#ip addr show
# cat /var/log/messages | grep [Ff]ailed | less
# vi /etc/inittab change - id:3:initdefault:

18. Search for a package within all packages
#yum grouplist
ln -s /pub /var/www/html/pub
cp /home/test1.html /var/www/html/test1.html
#rpm -qa | grep [package name]

19. Messages related to cron log
#rpm -qad [package name]
service ntpd restart
/var/log/cron
rsync -PHR /home/test1.html root@server6.example.com:/var/pub

20. FTP package used in RHEL 6
vsftpd
#iptables -D INPUT -p tcp --dport 21 -j accpet
IPtables output chain
/etc/rsyslog.conf

21. Grep for lines that do not match (-v)
/etc/sysconfig/iptables
$ grep -v ^# /etc/nsswitch.conf
tar cxtv
2>&1

22. Disk Utility Command
/usr/share/doc/initscripts-*/sysconfig.txt
palimpsest
cat >> some_file << _EOF
tar fzj

23. Persist the web server on boot
rhn_register
chkconfig httpd on
palimpsest
$ tar czvf home.tar.gz /home

24. 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 root@server6.example.com:/var/pub
Fully Qualified Domain Name
IPtables output chain
logwatch

25. Register on the RHN
# virsh create /etc/libvert/qemu/vm_file_name.xml
/etc/ssh/sshd_config
# star -xattr -H=exustar -c -f=home.star /home/
rhn_register

26. An example of searching through system logs with interpretation.
/etc/yum.repos.d/
/etc/yum.repos.d
# cat /var/log/messages | grep [Ff]ailed | less
#rpm -qa | grep [package name]

27. Get more information on a package availale through yum
#iptables -I INPUT -p tcp --dport 21 -j Accept
#rpm -uvh [package name]
yum install tigervnc-server
#yum info [package name]

28. GUI install / uninstall with yum
tar xvzf /tmp/etc.tar.gz /etc
#virsh list
rpm --import [public key location]
add/remove software GUI

29. Backup a home directory on desktop6 to /tmp on server6
#yum
$ tar xzvf home.tar.gz /home
rsync /home root@server6.example.com:/tmp
rpm -qp pkg.rpm

30. Configuration file for system logs
yum provides "*/sbin/sshd"
yum list
/etc/rsyslog.conf
#rpm -qa | grep [package name]

31. Package file named pkg.rpm
rpm -qp pkg.rpm
$ grep -v ^# /etc/nsswitch.conf
Fully Qualified Domain Name
#iptables -D INPUT -p tcp --dport 21 -j accpet

32. List VMs
service vncserver restart chkconfig vncserver on
yum remove firefox4
rsync /home root@server6.example.com:/tmp
#virsh list

33. fqdn
/etc/sysconfig/iptables
# ls -l /usr/share/doc | grep httpd
Fully Qualified Domain Name
vncviewer -via student@server6 localhost:2

34. Local host file (contains hostname). Can contain local system DNS.
ssh-copy-id root@server6.example.com
/etc/hosts
#yum grouplist
# yum

35. Process packets coming into the system
IPtables input chain
/etc/rsyslog.conf
logwatch
/var/www/html/

36. Uninstall a package group with yum
$ tar czvf home.tar.gz /home
#yum groupremove "group name"
# star -x -f=home.star
# yum

37. tar options for file name - gzip - and bzip2
.spec
#rpm -ivh [package name]
[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
tar fzj

38. Start a VM
/var/log/secure
# virsh create /etc/libvert/qemu/vm_file_name.xml
#yum install [package name]
vsftpd restart

39. Shows network / global network variables: NETWORKING=yes HOSTNAME=shuttlehosti GATEWAY=192.168.88.1
service ntpd restart
palimpsest
/var/log/secure
/etc/sysconfig/network

40. Process packets being forwarded through the system
IPtables forward chain
/var/log/messages
# grep -i
[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

41. List scripts that can be run after installation of pkg.rpm
/var/log/cron
rpm -q pkg.rpm --scripts
GUI menu system/administratrion/firewall
#rpm -uvh [package name]

42. Start GUI for Firewall
system-config-firewall (Push the enable button and check the appropriate boxes. Check.)
yum provides
system-config-date
insert as opposed to append

43. Shell config tool gropued like GUI firewall configurater.
#yum grouplist
system-config-firewall tui
/etc/services
tar fzj

44. Get a list of package groups from yum
/var/log/messages
rpm -ql vsftpd
#yum grouplist
ssh-keygen

45. Sync ntp time with the instructor
ssh-keygen
ntpdate -b instructor
#yum
*.debug /var/log/debug.log service rsyslog restart

46. Where are HTML pages hosted?
#yum remove [package name]
rsync /home/test1.html root@server6.example.com:/var/pub
/var/www/html/
#iptables -L

47. Redirect errors to std out
# ls -l /usr/share/doc | grep httpd
/etc/services
#yum info [package name]
2>&1

48. Update a package
# virsh create /etc/libvert/qemu/vm_file_name.xml
yum update
#iptables -L
cp /home/test1.html /var/www/html/test1.html

49. Copy a public ssh key to server6
IPtables output chain
tar fzj
ssh-copy-id root@server6.example.com
MailTo=student@server6.example.com

50. Rpm upgrade package u upgrade v verbose h hash
#rpm -uvh [package name]
/etc/hosts
rpm -qp pkg.rpm
#yum

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RHCSA Commands

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