Oracle 1z1-100 : Oracle Linux 5 and 6 System Administration

Examine these configuration files:
# cat /etc/auto.master
/net-hosts
/- auto.direct ro
# cat /etc/auto.direct
/nfs1 o16:/export/share1
/nfs2 -sync o16:/export/share2
/nfs o16:/export/share3
Which mount options will automounter use to mount the filesystems listed in /etc/auto.direct?

• A. All three filesystems are mounted read-write, sync.
• B. /nfs1 and /nfs3 are mounted read-only, async whereas /nfs2 mounted read-write, sync.
• C. All three filesystems are mounted read-only, async.
• D. /nfs1 and /nfs3 are mounted read-only, async whereas /nfs2 mounted read-only, sync.

A web server on HOST01 is listening on port 80.
Examine the IPTABLES rule shown:
[root@host01 ~] # iptables -L INPUT
Chain INPUT (policy ACCEPT)
targetportoptsourcedestination
ACCEPTtcp- - anywhereanywheretcp dpt:http
Another rule is then added:
[root@host01 ~] # iptables -A INPUT -P tcp - - dport 80 -j REJECT
What is the effect of this command on subsequent attempts to access the web server on HOST01 using port
80?

• A. New connection attempts always succeed.
• B. New connection attempts timeout.
• C. New connection attempts succeed until a reload of the firewall rules.
• D. New connection attempts are refused and the client informed of the refusal.

Which two actions are the required steps to prevent: non-root ssh access to the system?

• A. Creating the /etc/nologin.allow file containing a single line root
• B. Ensuring that /etc/pam.d/sshd includes: account requiredpam_nologin.so
• C. Ensuring that /etc/pam.d/sshd includes: account sufficient pam_nologin.so
• D. Create the /etc/nologin/login.deny file containing a single line +all
• E. Creating the /etc/nologin file

Examine some of the contents of the /boot/grub/grub.com file from an Oracle Linux system:
Default=0
Timeout=5
Splashimage=(hd0, 0)/grub/splash.xpm.gz
Hiddenmenu
Title Oracle Linux Server (2.6.39-100.0.12.16uek.x86_64)
Root (hd0, 0)
Kernet /vmlinuz-2.6.39-100.0.12.e16uek.x86_64 ro root=UUIP=a4b6049b-9aa1-44b4-87cf-aebb17alcdf9 rd_NO_LUKS re_NO_LVM rd_NO_DM LANG=en_US.UTF-8 SYSFONT=1atarcycreheb-sun16 KEYBOARDTYPE=PC KEYTABLE=us rhgb quiet numa=off Initrd /initramfs-2.6.39-100.0.12.e16uek.x86_64.img Title Oracle Linux Server (2.6.32-131.0.15.e16.x86_64) Root (hd0, 0) Kernel /vmlinuz-2.6.32-131.0.15.e16.x86_64 ro root=UUIS=a4b6049b-9aa1-44b4-87cf-aebb17a1cdf9 rd_NO_LUKS rd_NO_LVM rd_NO_LVM re_NO_MD rd_NO_DM LANG=en_UD.UTF-8 SYSFONT=latarcyheb-sun16 KEYBOARDTYPE=PC KEYTABLE=us Crashkernel=auto rhgp quiet numa = off Initrd /initramfs-2.6.32-131.0.15.e16.x86_64.img Which three statements are true about the behavior and configuration of GRUB on this system?

• A. (hd0, 0) represents the first partition on device /dev/hd0.
• B. Because there is an Unbreakable Enterprise Kernel installed, it must be the default kernel listed as shown by the default=0 directive.
• C. Each kernel must have an initramfs that matches the version of the kernel.
• D. (hd0, 0) represents the first partition on the first drive detected by the BIOS.
• E. The initrd directive specifies the initamfs, an initial root filesystem in RAM, allowing access to block device modules to mount the real root filesystem.
• F. The hiddenmenu directive hides the GRUB menu only for 5 seconds after which it becomes visible again.
• G. The root directive specifies an initial root filesystem, allowing access to block device modules to mount the real root filesystem on disk.

Examine the routing table:

Which three statements are true concerning the routing of IP packets?

• A. Traffic to 192.168.180.240 is routed via eth1.
• B. Traffic to 192.168.180.180 is routed via eth0.
• C. Traffic to 192.168.180.180 is routed via eth1.
• D. Traffic to 192.168.42.42 is routed via eth0.
• E. Traffic to 192.168.42.42 is routed via eth2.
• F. Traffic to 192.168.0.42 is routed via eth2.