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Test your basic knowledge |
Redhat Linux Administration
Start Test
Study First
Subject
:
it-skills
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. ___ will tell me if any files in the pam package have changed since it was first installed
iptables -F
lvextend -L4G /dev/rootvg/tmplv
chmod 701
rpm -V pam
2. SELinux must be configured to Allow HTTPD To Read Home Directories. (Alternatively - activate the httpd_enable_homedirs boolean with the __ command.)
grep "[.*]" server1.repo
setsebool -P htttpd.enable.homedirs 1
-i (do not use -U or -F!)
dd if=./diskboot.img of=/dev/sdc
3. logical partitions on a hard drive always start with number ____; on the first PATA/IDE hard drive on a PC - that is hda____.
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
yum update kernel
5
pirut
4. ____ is used for creating ext2 and ext3 file systems
chkconfig --level 35 httpd on
mke2fs
fdisk -l
ok
5. For linux ext2 there is an easier way than using resize2fs. LVM 1 ships with a utility called __________ which does the lvextend and resize2fs for you (it can also do file system shrinking)
/boot
yum update kernel
NameVirtualHost
e2fsadm
6. Virtual Host Configuration: Assigns an e-mail address for the specified virtual host.
fdisk
ServerAdmin
wget (http://devmon.dev.schwab.com/index.html)
showmount -e
7. You can use the ____ tool after installation to add any package groups that you missed.
pirut
yum -y update httpd
rpm -V zip
fdisk -l
8. This line: in /etc/hosts.allow: telnetd : 172.16.72.0/255.255.254.0 is ____
/boot
mke2fs
fdisk -l
ok
9. To select a different device without having to restart parted - use the ____ command . Then - you can view its partition table or configure it.
yum clean all
iptables
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
select (followed by the device name such as /dev/hdb)
10. You need to configure firewalls and allow SELinux access in appropriate ways. Firewalls must allow access to the standard HTTP port - 80. SELinux must be configured to "Allow HTTPD To Read Home Directories". Finally - the ACL must be revised accordin
CustomLog
chcon -R -t httpd_sys_content_t /home/michael/public_html
example
resize2fs /dev/myvg/homevol
11. The RPM database also maintains an MD5 checksum of each file. With the checksum - you can use the ____ package command to determine whether any file from that RPM package has changed.
parted; check x
rpm -V
-K
yum -y update httpd
12. You just finished editing your /etc/yum.repos.d/*repo file and want yum to use the new info - so you run ____
NameVirtualHost
yum clean all
fdisk -l
showmount -a
13. To check status of ftp daemon
rpm -V
dumpe2fs
service vsftpd status
squid -z
14. The default Red Hat Enterprise Linux firewall blocks access to an NFS server. While inelegant - the following command "flushes -" or turns off - the standard Linux firewall from the local computer.
iptables -F
telnetd : ALL EXCEPT 192.168.1.10
chmod 705
yum install httpd
15. ___ shows me what config files were installed when the httpd package was installed
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
rpm -qc httpd
service vsftpd status
--import file
16. You ran "e2label /dev/sda" and got "bad magic number" Why?
chmod 701
filesystem type is not ext2 or ext3
htpasswd -c /etc/httpd/webpass e
elinks
17. when an rpm install fails for xxxx because the same version is already apparently installed - run ____ to just install it all again
DocumentRoot
rpm -ivh --replacepkgs xxxx*
dumpe2fs
ServerTokens OS from http.conf
18. ___ to update the httpd package - automatically answering yes to all the questions
rpm --import /etc/pki(/rpm-gpg/RPM-GPG-KEY-redhat-release)
dumpe2fs
--import file
yum -y update httpd
19. _____ will change the size of /dev/rootvg/tmplv to 4 gig
lvextend -L4G /dev/rootvg/tmplv
NameVirtualHost
yum install httpd
rpm -Va
20. This line placed in /etc/hosts.deny sends a customized error message for Telnet users on the crack.org domain saying sorry [insert client info] - access denied
--import file
iptables
ServerTokens OS from http.conf
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
21. The file that might contain: oldvg - rootvg - etc.
-i (do not use -U or -F!)
/boot
/etc/lvmtab
ok
22. rpm ____ [name of package] to verify the package - once you have manually imported the key
htpasswd -c /etc/httpd/webpass e
telnetd : ALL EXCEPT 192.168.1.10
ErrorLog
-K
23. This line placed in /etc/hosts.deny will mean that only computer allowed to access our Telnet server has an IP address of 192.168.1.10
AllowOverride
dd if=./diskboot.img of=/dev/sdc
yum clean all
telnetd : ALL EXCEPT 192.168.1.10
24. output from ____ is: Disk /dev/cciss/c0d0: 36.4 GB - 36414750720 bytes... plus listing of partitions - for each physical drive
service vsftpd status
ok
DocumentRoot
fdisk -l
25. To verify integrity of an rpm package - ____/rpm-gpg/RPM-GPG-KEY-redhat-release
bootable partitions
lvdisplay -D /dev/rootvg/tmplv
setsebool -P htttpd.enable.homedirs 1
rpm --import /etc/pki(/rpm-gpg/RPM-GPG-KEY-redhat-release)
26. use grep to count how many repositories have been configured in the file server1.repo
grep "[.*]" server1.repo
ServerAdmin
setsebool -P squid_connect_any 1
ServerTokens OS from http.conf
27. To update a kernel - 1) ____ 2) boot new kernel to test 3) revert to old kernel if problems 4) yum remove kernel-oldversion if no problems
-i
lvextend -L4G /dev/rootvg/tmplv
yum update kernel
resize2fs
28. ____.com - ____.net - and ____.org domains are generic domain names that can't be assigned on the Internet. You can therefore use any of these domain names on your private network.
example
lvdisplay -D /dev/rootvg/tmplv
-i (do not use -U or -F!)
yum -y update httpd
29. List sboth the client hostname or IP address and mounted directory in host:dir format. This info should not be considered reliable.
showmount -a
(rpm -q)p file (for rpmfile name)
LVM
example
30. create the basic cache directories in /var/spool/squid with the following command:
squid -z
showmount -a
-K
service vsftpd status
31. for http - if you implement "UserDir public_html" - you need to also ____ /home/michael if you want /home/michael/public_html accessible
bootable partitions
chmod 701
yum -y update httpd
rpm -V pam
32. The rpm ____ option installs the package - if it isn't already installed.
filesystem type is not ext2 or ext3
-i
ServerName
showmount -e
33. Run the ____ command to find the device associated with the USB key.
elinks
showmount -a
fdisk -l
AllowOverride
34. how to install both mod_ssl and squid packages
(rpm -q)p file (for rpmfile name)
CustomLog
DocumentRoot
yum install mod_ssl squid
35. ___________ can be on a RAID device
ServerTokens OS from http.conf
arted; mklabel k
bootable partitions
fdisk -l
36. rpm ____ to import the rpm key for integrity checking
elinks
/etc/lvmtab
--import file
chcon -R -t httpd_sys_content_t /home/michael/public_html
37. ______ will show me volume info including vg - size - etc of /dev/rootvg/tmplv
resize2fs /dev/myvg/homevol
telnetd : ALL EXCEPT 192.168.1.10
lvdisplay -D /dev/rootvg/tmplv
5
38. Virtual Host Configuration: Names the URL for the virtual host.
parted; check x
fdisk
elinks
ServerName
39. Apache supports security by specifying active ports through the Listen and ____ directives.
(rpm -q)p file (for rpmfile name)
-K
NameVirtualHost
5
40. To list under which run levels the web service will start
rpm -Va
ls -Z
hkconfig --list httpd
rpm -ivh --replacepkgs xxxx*
41. Perform a simple check of the file system. minor-num is x.
parted; check x
nfs
ALL EXCEPT in.tftpd : .example.org (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
dd if=./diskboot.img of=/dev/sdc
42. You can check the status of your share. If it's working - you should see the contents of the /etc/exports directory when you run the following command:
ALL EXCEPT in.tftpd : .example.org (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
rpm -V zip
bootable partitions
showmount -e
43. ____ is used to modify file system parameters
iptables -F
example
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
tune2fs
44. use parted to display disk geometry for /dev/hda and end up in shell
parted /dev/hda print
wget (http://devmon.dev.schwab.com/index.html)
e2fsadm
fdisk -l
45. create a usb boot disk if the usb stick is /dev/sdc and the file you need is in your present directory
resize2fs
dd if=./diskboot.img of=/dev/sdc
setsebool -P htttpd.enable.homedirs 1
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
46. rpm option to show me the package files
rpm -V
elinks
rpm -V pam
-l
47. It's much more difficult and much more time-consuming to revise partitions with utilities such as ____ or parted after RHEL is installed.
fdisk -l
wget (http://devmon.dev.schwab.com/index.html)
fdisk -l
fdisk
48. for SELinux - you'll at least want to use the Security Level Configuration tool to activate the Allow Squid Daemon To Connect To The Network option - also known as the squid_connect_any boolean. Alternatively - you can activate this boolean with the
(rpm -q)p file (for rpmfile name)
setsebool -P squid_connect_any 1
chkconfig --level 35 httpd on
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
49. The most straightforward way to make sure Apache starts in bootlevels 3 and 5
chkconfig --level 35 httpd on
NameVirtualHost
setsebool -P squid_connect_any 1
iptables -F
50. Virtual Host Configuration: Creates an custom log; the location is based on the DocumentRoot. (from http://www.books24x7.com/book/id_18196/viewer.asp?bookid=18196&chunkid=218985502)
htpasswd -c /etc/httpd/webpass e
-i
CustomLog
rpm -V pam