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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: 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 2: Configure local storage | 15% | - Configure swap space - List, create, delete partitions and GPT/MBR layouts - Create and manage LVM physical volumes, volume groups, logical volumes |
| Topic 3: Manage users and groups | 10% | - Manage password policies and sudo access - Configure SSH key-based authentication - Create, delete, modify users and groups |
| Topic 4: Understand and use essential tools | 25% | - Use input-output redirection - Access remote systems via SSH - Access shell prompt and issue commands with correct syntax - Use grep and regular expressions - Archive, compress, unpack files using tar, gzip, bzip2 - Create/edit text files; manage files, directories, links, permissions |
| Topic 5: Create and configure file systems | 15% | - Mount and manage network file systems (NFS, autofs) - Maintain entries in /etc/fstab using UUID or labels - Manage access control lists (ACLs) - Create and mount XFS, ext4, VFAT file systems |
| Topic 6: Operate running systems | 20% | - Manage logging and journaling - Manage networking and network services - Schedule tasks using cron and at - Boot systems into different targets; manage systemd units - Maintain accurate system time with chrony |
| Topic 7: Perform basic shell scripting | - Use conditional statements, loops, and script inputs | |
| Topic 8: Manage security | 10% | - Restore file contexts and troubleshoot SELinux issues - Enforce SELinux modes, contexts, booleans, and port labeling |
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NEW QUESTION # 36
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:
[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
Configure NTP.
Configure NTP service, Synchronize the server time, NTP server: classroom.example.com
Answer:
Explanation:
see explanation below.
Explanation
Configure the client:
Yum -y install chrony
Vim /etc/chrony.conf
Add: server classroom.example.com iburst
Start: systemctl enable chronyd
systemctl restart chronyd
Validate: timedatectl status
NEW QUESTION # 38
Create a compressed archive of /etc and verify its file type.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
tar -zvcf /root/etc_backup.tar.gz /etc
file /root/etc_backup.tar.gz
Detailed Explanation:
* tar creates the archive.
* -z uses gzip compression.
* -v is verbose.
* -c creates the archive.
* -f names the output file.
* file confirms the resulting archive type.
NEW QUESTION # 39
There is a local logical volumes in your system, named with common and belong to VGSRV volume group, mount to the /common directory. The definition of size is 128 MB.
Requirement:
Extend the logical volume to 190 MB without any loss of data. The size is allowed between 160-160 MB after extending.
Answer:
Explanation:
see explanation below.
Explanation
lvextend -L 190M /dev/mapper/vgsrv-common resize2fs /dev/mapper/vgsrv-common
NEW QUESTION # 40
: 107 SIMULATION
Add an additional swap partition of 754 MB to your system.
The swap partition should automatically mount when your system boots.
Do not remove or otherwise alter any existing swap partitions on your system.
Answer:
Explanation:
see explanation below.
Explanation
* fdisk -l
* fdisk -cu /dev/vda
p n
e or p select e
default (first): enter
default (last): enter n
default(first): enter
default(first): +754M t (1-5)
l: 82 p
w #reboot
#mkswap /dev/vda5
* vim /etc/fstab
/dev/vda5 swap swap defaults 0 0
wq
* mount -a
* swapon -a
* swapon -s
NEW QUESTION # 41
......
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