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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Manage security | 10% | - Restore file contexts and troubleshoot SELinux issues - Enforce SELinux modes, contexts, booleans, and port labeling |
| Topic 2: Manage users and groups | 10% | - Manage password policies and sudo access - Create, delete, modify users and groups - Configure SSH key-based authentication |
| Topic 3: Create and configure file systems | 15% | - Manage access control lists (ACLs) - Create and mount XFS, ext4, VFAT file systems - Mount and manage network file systems (NFS, autofs) - Maintain entries in /etc/fstab using UUID or labels |
| Topic 4: Understand and use essential tools | 25% | - Use input-output redirection - Create/edit text files; manage files, directories, links, permissions - Use grep and regular expressions - Access shell prompt and issue commands with correct syntax - Access remote systems via SSH - Archive, compress, unpack files using tar, gzip, bzip2 |
| Topic 5: Operate running systems | 20% | - Schedule tasks using cron and at - Manage logging and journaling - Boot systems into different targets; manage systemd units - Maintain accurate system time with chrony - Manage networking and network services |
| Topic 6: Configure local storage | 15% | - Create and manage LVM physical volumes, volume groups, logical volumes - Configure swap space - List, create, delete partitions and GPT/MBR layouts |
| Topic 7: Deploy, configure, and maintain systems | 15% | - Configure firewalld firewall rules - Manage network interfaces and settings with NetworkManager/nmcli - Manage software packages with DNF/YUM |
| Topic 8: Perform basic shell scripting | - Use conditional statements, loops, and script inputs |
>> Original EX200 Questions <<
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NEW QUESTION # 35
Part 1 (on Node1 Server)
Task 17 [Accessing Linux File Systems]
Find all the files owned by user "alex" and redirect the output to /home/alex/files.
Answer:
Explanation:
* root@node1 ~]# find / -user alex -type f > /home/alex/files
NEW QUESTION # 36
04. Create User Accounts
Create the following user accounts, ensuring the checkboxes are enabled:
- Group named sysmgrs
- User natasha, belonging to the sysmgrs group as a secondary group
- User harry, belonging to the sysmgrs group as a secondary group
- User sarah, with no access to interactive shell on the system and not a member of sysmgrs
- Passwords for natasha, harry, and sarah should all be "flectrag".
Answer:
Explanation:
Solution:
[root@node1 ~]# groupadd sysmgrs
[root@node1 ~]# useradd -G sysmgrs natasha
[root@node1 ~]# useradd -G sysmgrs harry
[root@node1 ~]# useradd -s /bin/false sarah
[root@node1 ~]# echo tianyun |passwd --stdin natasha
[root@node1 ~]# echo tianyun |passwd --stdin harry
[root@node1 ~]# echo tianyun |passwd --stdin sarah
NEW QUESTION # 37
Boot once into emergency mode from GRUB.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Reboot the server.
* At the GRUB menu, highlight the kernel entry and press e.
* Find the line starting with linux.
* Append:
systemd.unit=emergency.target
* Press Ctrl+x to boot.
Detailed Explanation:
* This changes the boot target only for the current boot.
* Emergency mode is useful for rescue and maintenance tasks.
* Red Hat's RHEL 10 systemd guidance documents booting with systemd.unit= < name > .target from
GRUB. ( Red Hat Documentation )
NEW QUESTION # 38
Part 1 (on Node1 Server)
Task 13 [Archiving and Transferring Files & SELinux]
Create a backup file named /root/backup.tar.bz2. The backup file should contain the content of /usr/local and should be zipped with bzip2 compression format.
Furthermore, ensure SELinux is in enforcing mode. If it is not, change SELinux to enforcing mode.
Answer:
Explanation:
* [root@node1 ~]# tar cvf /root/backup.tar /usr/local/
tar: Removing leading `/' from member names
/usr/local/
/usr/local/bin/
/usr/local/etc/
[root@node1 ~]# ls
backup.tar
[root@node1 ~]# file backup.tar
backup.tar: POSIX tar archive (GNU)
[root@node1 ~]# bzip2 backup.tar
[root@node1 ~]# ls
backup.tar.bz2
[root@node1 ~]# file backup.tar.bz2
backup.tar.bz2: bzip2 compressed data, block size = 900k
*
[root@node1 ~]# sestatus
SELinux status: enabled
[root@node1 ~]# cat /etc/selinux/config
SELINUX=enforcing
SELINUXTYPE=targeted
[root@node1 ~]# reboot
### For Checking ###
[root@node1 ~]# sestatus
SELinux status: enabled
NEW QUESTION # 39
Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original swap partition.
Answer:
Explanation:
# fdisk /dev/sda
p
(check Partition table)
n
(create new partition: press e to create extended partition, press p to create the main partition, and the extended partition is further divided into logical partitions) Enter
+2G
t
l
W
partx -a /dev/sda
partprobe
mkswap /dev/sda8
Copy UUID
swapon -a
vim /etc/fstab
UUID=XXXXX swap swap defaults 0 0
(swapon -s)
NEW QUESTION # 40
......
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