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EX200 PDF DEMO:QUESTION NO: 1 The firewall must be open. Answer: see explanation below. Explanation /etc/init.d/iptables start iptables -F iptables -X iptables -Z /etc/init.d/iptables save chkconfig iptables on
QUESTION NO: 2 Resize the logical volume vo and its filesystem to 290 MB. Make sure that the filesystem contents remain intact. Note: Partitions are seldom exactly the same size requested, so a size within the range of 260 MB to 320 MiB is acceptable. Answer: see explanation below. Explanation df -hT lvextend -L +100M /dev/vg0/vo lvscan xfs_growfs /home/ // home is LVM mounted directory Note: This step is only need to do in our practice environment, you do not need to do in the real exam resize2fs /dev/vg0/vo // Use this comand to update in the real exam df -hT OR e2fsck - f/dev/vg0/vo umount /home resize2fs /dev/vg0/vo required partition capacity such as 100M lvreduce -l 100M /dev/vg0/vo mount /dev/vg0/vo /home df -Ht
QUESTION NO: 3 Create the following users, groups, and group memberships: A group named adminuser. A user natasha who belongs to adminuser as a secondary group A user harry who also belongs to adminuser as a secondary group. A user sarah who does not have access to an interactive shell on the system, and who is not a member of adminuser, natasha, harry, and sarah should all have the password of redhat. Answer: see explanation below. Explanation * groupadd sysmgrs * useradd -G sysmgrs Natasha * We can verify the newly created user by cat /etc/passwd) # useradd -G sysmgrs harry # useradd -s /sbin/nologin sarrh # passwd Natasha # passwd harry # passwd sarrah
QUESTION NO: 4 Configure /var/tmp/fstab Permission. Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following: Owner of the file /var/tmp/fstab is Root, belongs to group root File /var/tmp/fstab cannot be executed by any user User natasha can read and write /var/tmp/fstab User harry cannot read and write /var/tmp/fstab All other users (present and future) can read var/tmp/fstab. Answer: see explanation below. Explanation cp /etc/fstab /var/tmp/ * /var/tmp/fstab view the owner setfacl -m u:natasha:rw- /var/tmp/fstab setfacl -m u:haryy:--- /var/tmp/fstab Use getfacl /var/tmp/fstab to view permissions
QUESTION NO: 5 Open kmcrl value of 5 , and can verify in /proc/ cmdline Answer: see explanation below. Explanation # vim /boot/grub/grub.conf kernel/vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/GLSvg- GLSrootrd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet kmcrl=5 Restart to take effect and verification: # cat /proc/cmdline ro root=/dev/mapper/GLSvg-GLSroot rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet kmcrl=5
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Updated: May 26, 2022
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