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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. Virtual Host Configuration: Specifies an IP address for multiple virtual hosts.
5
chmod 701
NameVirtualHost
chkconfig --level 35 httpd on
2. Apache supports security by specifying active ports through the Listen and ____ directives.
iptables -F
chcon -R -t httpd_sys_content_t /home/michael/public_html
NameVirtualHost
/etc/squid/
3. how to install both mod_ssl and squid packages
iptables
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
yum install mod_ssl squid
fdisk -l
4. ___ to update the httpd package - automatically answering yes to all the questions
LVM
yum -y update httpd
-i (do not use -U or -F!)
5
5. after extending file system "homevol" - unmount it and then run _____ to make the filesystem size match the new larger volume.
tune2fs
DocumentRoot
AllowOverride
resize2fs /dev/myvg/homevol
6. in httpd.conf - "____ None" disables any .htaccess files. Otherwise - .htaccess can allow others to administer your server - starting from the DocumentRoot directory. If .htaccess is in a subdirectory - such as /var/www/html/data/ - the additional di
ServerTokens OS from http.conf
-i (do not use -U or -F!)
AllowOverride
fdisk
7. 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
yum update kernel
example
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
CustomLog
8. ____.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
chcon -R -t httpd_sys_content_t /home/michael/public_html
arted; mklabel k
-i
9. 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
e2fsadm
rpm -V pam
setsebool -P squid_connect_any 1
showmount -a
10. use parted to display disk geometry for /dev/hda and end up in shell
-i
parted /dev/hda print
AllowOverride
ServerTokens OS from http.conf
11. ___________ can be on a RAID device
service vsftpd status
resize2fs
-K
bootable partitions
12. Run the ____ command to find the device associated with the USB key.
ErrorLog
rpm -Va
fdisk -l
rpm -V
13. If you want to add an iptables command to forward TCP port 80 traffic to TCP port 3128 - you would use the following:
ServerTokens OS from http.conf
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
NameVirtualHost
setsebool -P htttpd.enable.homedirs 1
14. rpm ____ verifies all installed rpms against the rpm database
rpm -V pam
ls -Z
NameVirtualHost
rpm -Va
15. for http - if you implement "UserDir public_html" - you need to also ____ /home/michael/public_html if you want /home/michael/public_html accessible
example
telnetd : ALL EXCEPT 192.168.1.10
chmod 705
DocumentRoot
16. ____ prints superblock and block group information.
fdisk
dumpe2fs
CustomLog
-l
17. rpm ____ to install kernel updates
dumpe2fs
iptables -F
example
-i (do not use -U or -F!)
18. if you want to create a database file named webpass in the /etc/httpd directory - for user "e" - you'd start with the following command:
htpasswd -c /etc/httpd/webpass e
select (followed by the device name such as /dev/hdb)
example
fdisk -l
19. To list under which run levels the web service will start
hkconfig --list httpd
parted /dev/hda print
chkconfig --level 35 httpd on
DocumentRoot
20. when an rpm install fails for xxxx because the same version is already apparently installed - run ____ to just install it all again
yum install httpd
iptables -F
rpm -ivh --replacepkgs xxxx*
--import file
21. ___ http://devmon.dev.schwab.com/index.html will make a local copy of the index.html file from devmon
setsebool -P squid_connect_any 1
yum install mod_ssl squid
-i (do not use -U or -F!)
wget (http://devmon.dev.schwab.com/index.html)
22. 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.
dd if=./diskboot.img of=/dev/sdc
resize2fs /dev/myvg/homevol
iptables -F
pirut
23. ____ is used to modify file system parameters
tune2fs
-i (do not use -U or -F!)
yum update kernel
arted; mklabel k
24. after you edit /etc/exports - run service ___ stop...
rpm -qc httpd
nfs
wget (http://devmon.dev.schwab.com/index.html)
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
25. SELinux must be configured to Allow HTTPD To Read Home Directories. (Alternatively - activate the httpd_enable_homedirs boolean with the __ command.)
iptables -F
showmount -a
setsebool -P htttpd.enable.homedirs 1
rpm -V
26. To verify integrity of an rpm package - ____/rpm-gpg/RPM-GPG-KEY-redhat-release
LVM
ok
-i
rpm --import /etc/pki(/rpm-gpg/RPM-GPG-KEY-redhat-release)
27. rpm ____ to import the rpm key for integrity checking
select (followed by the device name such as /dev/hdb)
htpasswd -c /etc/httpd/webpass e
NameVirtualHost
--import file
28. Virtual Host Configuration: Assigns an e-mail address for the specified virtual host.
wget (http://devmon.dev.schwab.com/index.html)
htpasswd -c /etc/httpd/webpass e
squid -z
ServerAdmin
29. You can use the ____ tool after installation to add any package groups that you missed.
chcon -R -t httpd_sys_content_t /home/michael/public_html
fdisk -l
rpm -qc httpd
pirut
30. The simplest way to install Apache
telnetd : ALL EXCEPT 192.168.1.10
yum install httpd
squid -z
rpm -V zip
31. ____ configuration is not available via text mode RHEL installation.
iptables
LVM
mke2fs
bootable partitions
32. This line placed in /etc/hosts.deny denies all services except TFTP to computers in the example.org domain
parted; check x
yum -y update httpd
ALL EXCEPT in.tftpd : .example.org (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
--import file
33. rpm option to show me the package files
wget (http://devmon.dev.schwab.com/index.html)
yum clean all
pirut
-l
34. logical partitions on a hard drive always start with number ____; on the first PATA/IDE hard drive on a PC - that is hda____.
5
(rpm -q)p file (for rpmfile name)
ServerName
hkconfig --list httpd
35. You just finished editing your /etc/yum.repos.d/*repo file and want yum to use the new info - so you run ____
yum clean all
ErrorLog
--import file
ALL EXCEPT in.tftpd : .example.org (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
36. rpm ____ verifies the installed zip rpm against the rpm database
filesystem type is not ext2 or ext3
DocumentRoot
rpm -V zip
mke2fs
37. ___ shows me what config files were installed when the httpd package was installed
/etc/lvmtab
setsebool -P htttpd.enable.homedirs 1
rpm -qc httpd
showmount -e
38. To check status of ftp daemon
rpm -qc httpd
service vsftpd status
lvextend -L4G /dev/rootvg/tmplv
ok
39. Virtual Host Configuration: Names the URL for the virtual host.
nfs
ServerName
LVM
example
40. When you configure Squid on your system - you need to allow access through appropriate ports and SELinux settings. The simplest approach with respect to Squid configuration assumes that all clients use the default Squid port 3128 - using TCP - where
example
iptables
DocumentRoot
select (followed by the device name such as /dev/hdb)
41. 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
rpm -V
hkconfig --list httpd
service vsftpd status
chcon -R -t httpd_sys_content_t /home/michael/public_html
42. rpm options include rpm -q [package name] or rpm -qf [path/file] or rmp -q____
chmod 701
setsebool -P htttpd.enable.homedirs 1
(rpm -q)p file (for rpmfile name)
ok
43. ____ can expand and shrink ext2 and ext3 file systems
-i (do not use -U or -F!)
filesystem type is not ext2 or ext3
parted; check x
resize2fs
44. This line looks deceptively simple; it limits what readers see about your Web server when you browse to a nonexistent page. If you don't use this command - outsiders can see whether you've loaded modules such as Perl - Python - and PHP. Sharing this
ServerTokens OS from http.conf
telnetd : ALL EXCEPT 192.168.1.10
-l
example
45. 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)
fdisk
dumpe2fs
fdisk -l
e2fsadm
46. ;'___ /var/www' will tell you the ACL settings of /var/www
htpasswd -c /etc/httpd/webpass e
ls -Z
chmod 701
parted; check x
47. create a usb boot disk if the usb stick is /dev/sdc and the file you need is in your present directory
yum clean all
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
dd if=./diskboot.img of=/dev/sdc
grep "[.*]" server1.repo
48. 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)
elinks
squid -z
CustomLog
dd if=./diskboot.img of=/dev/sdc
49. Create a disk label for the partition table called k
yum install httpd
arted; mklabel k
-i
rpm --import /etc/pki(/rpm-gpg/RPM-GPG-KEY-redhat-release)
50. To select a different device without having to restart parted - use the ____ command . Then - you can view its partition table or configure it.
iptables -F
select (followed by the device name such as /dev/hdb)
fdisk
-K