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| Section | Objectives |
|---|---|
| Topic 1: Create and configure file systems | - Configure autofs - Mount and unmount network file systems using NFS - Diagnose and correct file permission problems - Extend existing logical volumes - Create, mount, unmount, and use VFAT, ext4, and XFS file systems |
| Topic 2: Manage users and groups | - Change passwords and adjust password aging for local users - Create, delete, and modify local user accounts - Create, delete, and modify local groups and group memberships - Configure privileged access |
| Topic 3: Configure local storage | - Create and delete logical volumes - List, create, and delete partitions on GPT disks - Create and remove physical volumes - Configure systems to mount file systems at boot by UUID or label - Assign physical volumes to volume groups - Add new partitions, logical volumes, and swap non-destructively |
| Topic 4: Operate running systems | - Identify CPU and memory intensive processes and kill processes - Start, stop, and check the status of network services - Interrupt the boot process to gain access to a system - Manage tuning profiles - Boot, reboot, and shut down a system normally - Adjust process scheduling - Securely transfer files between systems - Locate and interpret system log files and journals - Preserve system journals - Boot systems into different targets manually |
| Topic 5: Manage security | - Manage default file permissions - Manage SELinux port labels - Restore default file contexts - Configure key-based authentication for SSH - Set enforcing and permissive modes for SELinux - List and identify SELinux file and process contexts - Use Boolean settings to modify SELinux settings - Configure firewall settings using firewall-cmd and firewalld |
| Topic 6: Deploy, configure, and maintain systems | - Configure systems to boot into a specific target automatically - Configure time service clients - Start and stop services and configure services to start automatically at boot - Install and update software packages - Schedule tasks using at, cron, and systemd timer units - Modify the system bootloader |
| Topic 7: Create simple shell scripts | - Process output of shell commands within a script - Use looping constructs to process files and command-line input - Process script inputs - Conditionally execute code |
| Topic 8: Manage software | - Install and remove RPM software packages - Install and remove Flatpak software packages - Configure access to Flatpak repositories - Configure access to RPM repositories |
| Topic 9: Manage basic networking | - Configure hostname resolution - Restrict network access using firewalld and firewall-cmd - Configure IPv4 and IPv6 addresses - Configure network services to start automatically at boot |
| Topic 10: Understand and use essential tools | - Access a shell prompt and issue commands with correct syntax - Create, delete, copy, and move files and directories - Use grep and regular expressions to analyze text - Log in and switch users in multi-user targets - Create hard and soft links - Access remote systems using SSH - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Use input-output redirection - Locate, read, and use system documentation - Create and edit text files - List, set, and change standard ugo/rwx permissions |
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NEW QUESTION # 26
Create Logical Volume
According to the given requirements, create a new logical volume:
- Logical volume named "mylv" belonging to the volume group "myvg" with a size of 50 extents.
- Extent size of logical volumes in volume group "myvg" should be 16 MiB.
- Format the new logical volume with the VFAT filesystem.
- The logical volume should be automatically mounted at /mnt/mydata during system startup.
Answer:
Explanation:
Solution:
# Check the disk layout
[root@node2 ~]# lsblk
# Partition the disk
[root@node2 ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.37.4).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): n # Add a new partition
Partition type
p primary (1 primary, 0 extended, 3 free) # Primary partition
e extended (container for logical partitions) # Extended partition
Select (default p): p
Partition number (2-4, default 2): # Press Enter
First sector (1026048-20971519, default 1026048): # Press Enter
***Note: The partition size must be larger than the total size, it should not be exactly equal to. It is recommended to add an extra 200M.
Last sector, +/-sectors or +/-size{K,M,G,T,P} (1026048-20971519, default 20971519): +1200M # Partition size
Created a new partition 2 of type 'Linux' and of size 512 MiB.
Command (m for help): w # Save and exit
The partition table has been altered.
Syncing disks.
# Create volume group and logical volume
[root@node2 ~]# vgcreate -s 16M myvg /dev/vdb4
[root@node2 ~]# lvcreate -l 50 -n mylv myvg
# Install vfat support
[root@node2 ~]# yum provides */mkfs.vfat
[root@node2 ~]# yum -y install dosfstools
# Format the logical volume with vfat filesystem
[root@node2 ~]# mkfs.vfat /dev/myvg/mylv
# Create mount point
[root@node2 ~]# mkdir /mnt/mydata
# Update /etc/fstab for automatic mounting
[root@node2 ~]# vim /etc/fstab
/dev/myvg/mylv /mnt/mydata vfat defaults 0 0
# Mount the logical volume
[root@node2 ~]# mount -a
NEW QUESTION # 27
Create a volume group with a physical extent size of 16 MB and create a logical volume using 30 extents.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
pvcreate /dev/sdb3
vgcreate -s 16M VG1 /dev/sdb3
lvcreate -l 30 -n LV1 VG1
mkfs.ext4 /dev/VG1/LV1
Detailed Explanation:
* vgcreate -s 16M sets PE size to 16 MB.
* lvcreate -l 30 allocates 30 extents.
* 30 x 16 MB = 480 MB total LV size.
* mkfs.ext4 creates the filesystem.
NEW QUESTION # 28
Configure a restrictive umask for user natasha so new files become 400 and directories become 500.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
echo "umask 0277" > > /home/natasha/.bash_profile
Detailed Explanation:
* A umask of 0277 removes group and other permissions entirely.
* New files: base 666 minus mask 277 gives 400.
* New directories: base 777 minus mask 277 gives 500.
* Putting it in .bash_profile applies it for that user's login shell.
NEW QUESTION # 29
Configure an NFS export /srv/nfs/projects so clients on 192.168.50.0/24 can mount it read-write.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
dnf install -y nfs-utils
mkdir -p /srv/nfs/projects
echo "/srv/nfs/projects 192.168.50.0/24(rw,sync)" > > /etc/exports
exportfs -rav
systemctl enable --now nfs-server
firewall-cmd --permanent --add-service=nfs
firewall-cmd --reload
exportfs -s
Detailed Explanation:
* nfs-utils provides the NFS server tools.
* /etc/exports defines the exported directory and allowed client network.
* exportfs -rav reloads exports.
* nfs-server must be enabled and started.
* If a firewall is enabled, the NFS service must be allowed.
* RHEL 10 network file services documentation covers NFS server configuration. ( Red Hat
Documentation )
NEW QUESTION # 30
Configure the system synchronous as 172.24.40.10.
Answer:
Explanation:
Graphical Interfaces:
System-->Administration-->Date & Time
OR
# system-config-date
NEW QUESTION # 31
......
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