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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. To list under which run levels the web service will start
hkconfig --list httpd
telnetd : ALL EXCEPT 192.168.1.10
NameVirtualHost
setsebool -P htttpd.enable.homedirs 1
2. 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
resize2fs /dev/myvg/homevol
ServerTokens OS from http.conf
service vsftpd status
parted /dev/hda print
3. ____ is used to modify file system parameters
chmod 705
tune2fs
pirut
DocumentRoot
4. ___________ can be on a RAID device
resize2fs
bootable partitions
ServerTokens OS from http.conf
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
5. Virtual Host Configuration: Assigns an e-mail address for the specified virtual host.
ServerAdmin
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
hkconfig --list httpd
/boot
6. ___ will tell me if any files in the pam package have changed since it was first installed
rpm -V pam
NameVirtualHost
rpm -qc httpd
showmount -a
7. 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:
chcon -R -t httpd_sys_content_t /home/michael/public_html
service vsftpd status
showmount -e
dumpe2fs
8. The most straightforward way to make sure Apache starts in bootlevels 3 and 5
telnetd : ALL EXCEPT 192.168.1.10
chkconfig --level 35 httpd on
rpm -V
showmount -a
9. You just finished editing your /etc/yum.repos.d/*repo file and want yum to use the new info - so you run ____
dumpe2fs
yum clean all
chmod 705
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
10. ;'___ /var/www' will tell you the ACL settings of /var/www
ls -Z
select (followed by the device name such as /dev/hdb)
htpasswd -c /etc/httpd/webpass e
chmod 705
11. It's much more difficult and much more time-consuming to revise partitions with utilities such as ____ or parted after RHEL is installed.
fdisk
grep "[.*]" server1.repo
rpm -qc httpd
dumpe2fs
12. The rpm ____ option installs the package - if it isn't already installed.
-i
chmod 705
dd if=./diskboot.img of=/dev/sdc
nfs
13. To select a different device without having to restart parted - use the ____ command . Then - you can view its partition table or configure it.
htpasswd -c /etc/httpd/webpass e
select (followed by the device name such as /dev/hdb)
ServerAdmin
ErrorLog
14. Virtual Host Configuration: Specifies an IP address for multiple virtual hosts.
fdisk -l
hkconfig --list httpd
ServerName
NameVirtualHost
15. 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.
select (followed by the device name such as /dev/hdb)
LVM
showmount -e
iptables -F
16. 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
tune2fs
ls -Z
rpm -qc httpd
17. for http - if you implement "UserDir public_html" - you need to also ____ /home/michael/public_html if you want /home/michael/public_html accessible
select (followed by the device name such as /dev/hdb)
lvdisplay -D /dev/rootvg/tmplv
dumpe2fs
chmod 705
18. Some computers built before 1998 may have a BIOS that limits access to hard disks beyond the 1024th cylinder. Some older BIOSs report only 1024 cylinders on a hard drive no matter how many actual cylinders are present. Computers that are subject to t
rpm -ivh --replacepkgs xxxx*
(rpm -q)p file (for rpmfile name)
/boot
lvdisplay -D /dev/rootvg/tmplv
19. Create a disk label for the partition table called k
arted; mklabel k
resize2fs
showmount -e
--import file
20. If you configure other directories for Web services - you'll need to change their ACL settings. For example - if you create and then use the /www directory - run the following commands:
/etc/lvmtab
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
LVM
htpasswd -c /etc/httpd/webpass e
21. 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
iptables
ls -Z
rpm -V
telnetd : .crack.org : twist /bin/echo Sorry %c - access denied (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
22. If you want to add an iptables command to forward TCP port 80 traffic to TCP port 3128 - you would use the following:
chmod 701
-i
dumpe2fs
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
23. ____ prints superblock and block group information.
dumpe2fs
showmount -a
hkconfig --list httpd
ServerName
24. rpm ____ verifies the installed zip rpm against the rpm database
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
chcon -R -t httpd_sys_content_t /home/michael/public_html
rpm -V zip
setsebool -P squid_connect_any 1
25. when an rpm install fails for xxxx because the same version is already apparently installed - run ____ to just install it all again
ok
(rpm -q)p file (for rpmfile name)
rpm -ivh --replacepkgs xxxx*
rpm -Va
26. The main Squid configuration file is ____/squid.conf
yum -y update httpd
parted; check x
5
/etc/squid/
27. create the basic cache directories in /var/spool/squid with the following command:
htpasswd -c /etc/httpd/webpass e
fdisk -l
squid -z
/etc/squid/
28. 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
resize2fs /dev/myvg/homevol
CustomLog
setsebool -P squid_connect_any 1
elinks
29. List sboth the client hostname or IP address and mounted directory in host:dir format. This info should not be considered reliable.
pirut
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
showmount -a
--import file
30. Run the ____ command to find the device associated with the USB key.
fdisk -l
yum -y update httpd
ls -Z
rpm -qc httpd
31. The simplest way to install Apache
-K
tune2fs
setsebool -P htttpd.enable.homedirs 1
yum install httpd
32. rpm ____ to install kernel updates
ok
example
DocumentRoot
-i (do not use -U or -F!)
33. This line placed in /etc/hosts.deny denies all services except TFTP to computers in the example.org domain
resize2fs /dev/myvg/homevol
ALL EXCEPT in.tftpd : .example.org (http://books24x7.com/viewer.asp?bookid=18196&chunkid=908275044)
/etc/lvmtab
chmod 701
34. use parted to display disk geometry for /dev/hda and end up in shell
parted /dev/hda print
rpm -ivh --replacepkgs xxxx*
LVM
chkconfig --level 35 httpd on
35. output from ____ is: Disk /dev/cciss/c0d0: 36.4 GB - 36414750720 bytes... plus listing of partitions - for each physical drive
bootable partitions
fdisk -l
-l
squid -z
36. This line: in /etc/hosts.allow: telnetd : 172.16.72.0/255.255.254.0 is ____
iptables
yum update kernel
pirut
ok
37. 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
dd if=./diskboot.img of=/dev/sdc
bootable partitions
CustomLog
AllowOverride
38. after extending file system "homevol" - unmount it and then run _____ to make the filesystem size match the new larger volume.
rpm -V pam
service vsftpd status
resize2fs /dev/myvg/homevol
grep "[.*]" server1.repo
39. how to install both mod_ssl and squid packages
CustomLog
lvextend -L4G /dev/rootvg/tmplv
yum install mod_ssl squid
rpm -ivh --replacepkgs xxxx*
40. 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
showmount -a
chcon -R -t httpd_sys_content_t /home/michael/public_html
/etc/squid/
grep "[.*]" server1.repo
41. Virtual Host Configuration: Creates an error log; the location is based on the DocumentRoot.
select (followed by the device name such as /dev/hdb)
-l
ErrorLog
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
42. rpm option to show me the package files
-l
yum install httpd
parted; check x
dd if=./diskboot.img of=/dev/sdc
43. rpm ____ to import the rpm key for integrity checking
--import file
/etc/squid/
rpm -Va
lvdisplay -D /dev/rootvg/tmplv
44. You can use the ____ tool after installation to add any package groups that you missed.
grep "[.*]" server1.repo
chcon -R -u system_u /www/; chcon -R -t httpd_sys_content_t /www/
arted; mklabel k
pirut
45. 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
telnetd : ALL EXCEPT 192.168.1.10
-l
rpm -Va
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
46. ____ configuration is not available via text mode RHEL installation.
rpm -ivh --replacepkgs xxxx*
ServerTokens OS from http.conf
(rpm -q)p file (for rpmfile name)
LVM
47. You ran "e2label /dev/sda" and got "bad magic number" Why?
-i (do not use -U or -F!)
filesystem type is not ext2 or ext3
NameVirtualHost
setsebool -P squid_connect_any 1
48. for http - if you implement "UserDir public_html" - you need to also ____ /home/michael if you want /home/michael/public_html accessible
e2fsadm
rpm -qc httpd
-i (do not use -U or -F!)
chmod 701
49. after you edit /etc/exports - run service ___ stop...
grep "[.*]" server1.repo
resize2fs
nfs
bootable partitions
50. Perform a simple check of the file system. minor-num is x.
iptables
parted; check x
NameVirtualHost
showmount -e