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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Create and configure file systems | 15% | - Create and mount XFS, ext4, VFAT file systems - Manage access control lists (ACLs) - Mount and manage network file systems (NFS, autofs) - Maintain entries in /etc/fstab using UUID or labels |
| Topic 2: Manage users and groups | 10% | - Configure SSH key-based authentication - Manage password policies and sudo access - Create, delete, modify users and groups |
| Topic 3: Perform basic shell scripting | - Use conditional statements, loops, and script inputs | |
| Topic 4: Deploy, configure, and maintain systems | 15% | - Manage software packages with DNF/YUM - Manage network interfaces and settings with NetworkManager/nmcli - Configure firewalld firewall rules |
| Topic 5: Operate running systems | 20% | - Maintain accurate system time with chrony - Manage logging and journaling - Boot systems into different targets; manage systemd units - Schedule tasks using cron and at - 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: Manage security | 10% | - Enforce SELinux modes, contexts, booleans, and port labeling - Restore file contexts and troubleshoot SELinux issues |
| Topic 8: Understand and use essential tools | 25% | - Use input-output redirection - Archive, compress, unpack files using tar, gzip, bzip2 - Use grep and regular expressions - Access remote systems via SSH - Access shell prompt and issue commands with correct syntax - Create/edit text files; manage files, directories, links, permissions |
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NEW QUESTION # 21
Set the default UMASK for user-created files
For the user natasha:
* The default permission for newly created files should be r--r--r--
* The default permission for newly created directories should be r-xr-xr-x
Answer:
Explanation:
Solution:
# su - natasha
Write the umask setting into the user's .bashrc file in the home directory:
bash
Copy code
echo 'umask 222' >> .bashrc
source .bashrc
Command explanation:
umask is used to control the default permissions for files and directories created by a user.
In umask:
The first digit is for special permissions and is usually 0 (can be omitted if not needed).
The second digit controls owner permissions.
The third digit controls group permissions.
The fourth digit controls permissions for others.
NEW QUESTION # 22
Add users: user2, user3.
The Additional group of the two users: user2, user3 is the admin group Password: redhat
Answer:
Explanation:
see explanation below.
Explanation
# useradd -G admin user2
# useradd -G admin user3
# passwd user2
redhat
# passwd user3
redhat
NEW QUESTION # 23
Install
the appropriate kernel update from http://server.domain11.example.com/pub/updates.
The following criteria must also be met:
The updated kernel is the default kernel when the system is rebooted
The original kernel remains available and bootable on the system
Answer:
Explanation:
see explanation below.
Explanation
* ftp server.domain11.example.com Anonymous login
ftp> cd /pub/updates ftp> ls
ftp> mget kernel* ftp> bye
* rpm -ivh kernel*
* vim /etc/grub.conf
Check the updatted kernel is the first kernel and the orginal kernel remains available. set default=0 wq!
NEW QUESTION # 24
Configure your Host Name, IP Address, Gateway and DNS.
Host name: dtop5.dn.ws.com
IP Address: 172.28.10.5/4
Gateway: 172.28.10.1
DNS: 172.28.10.1
Answer:
Explanation:
Configure Host Name
vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=dtop5.dn.ws.com GATEWAY=172.28.10.1
2. Configure IP Address, Gateway and DNS
Configure the network by Network Manager:
Note: Please remember to choose two options:
Connect automatically
Available to all users
Click "Apply", save and exit, and restart your network services:
# Service network restart
3. Validate these profiles:
a) Check gateway: # vim / etc / sysconfig / network
NETWORKING=yes
HOSTNAME=dtop5.dn.ws.com
GATEWAY=172.28.10.1
b) Check Host Name: # vim /etc/hosts
c) Check DNS: # vim /etc/resolv.conf
# Generated by NetworkManager
Search dn.ws.com
Nameserver 172.28.10.1
d) Check Gateway: # vim /etc/sysconfig/network-scripts/ifcfg-eth0
NEW QUESTION # 25
Create a new logical volume according to the following requirements:
The logical volume is named database and belongs to the datastore volume group and has a size of 50 extents.
Logical volumes in the datastore volume group should have an extent size of 16 MB.
Format the new logical volume with a ext3 filesystem.
The logical volume should be automatically mounted under /mnt/database at system boot time.
Answer:
Explanation:
fdisk -cu /dev/vda
partx -a /dev/vda
pvcreate /dev/vdax
vgcreate datastore /dev/vdax -s 16M
lvcreate-l 50 -n database datastore
mkfs.ext3 /dev/datastore/database
mkdir /mnt/database
mount /dev/datastore/database /mnt/database/ df -Th
vi /etc/fstab
/dev/datastore /database /mnt/database/ ext3 defaults 0 0 mount -a
NEW QUESTION # 26
......
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