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| Section | Objectives |
|---|---|
| Topic 1: Manage security | - Set enforcing and permissive modes for SELinux - Manage default file permissions - Restore default file contexts - Configure key-based authentication for SSH - List and identify SELinux file and process contexts - Use Boolean settings to modify SELinux settings - Manage SELinux port labels - Configure firewall settings using firewall-cmd and firewalld |
| Topic 2: Manage users and groups | - Configure privileged access - Create, delete, and modify local groups and group memberships - Create, delete, and modify local user accounts - Change passwords and adjust password aging for local users |
| Topic 3: Deploy, configure, and maintain systems | - Configure systems to boot into a specific target automatically - Schedule tasks using at, cron, and systemd timer units - Install and update software packages - Start and stop services and configure services to start automatically at boot - Configure time service clients - Modify the system bootloader |
| Topic 4: Configure local storage | - Add new partitions, logical volumes, and swap non-destructively - Configure systems to mount file systems at boot by UUID or label - Create and delete logical volumes - Create and remove physical volumes - List, create, and delete partitions on GPT disks - Assign physical volumes to volume groups |
| Topic 5: Operate running systems | - Boot, reboot, and shut down a system normally - Preserve system journals - Locate and interpret system log files and journals - Manage tuning profiles - Adjust process scheduling - Identify CPU and memory intensive processes and kill processes - Boot systems into different targets manually - Interrupt the boot process to gain access to a system - Start, stop, and check the status of network services - Securely transfer files between systems |
| Topic 6: Manage software | - Install and remove Flatpak software packages - Install and remove RPM software packages - Configure access to Flatpak repositories - Configure access to RPM repositories |
| Topic 7: Create simple shell scripts | - Process output of shell commands within a script - Process script inputs - Use looping constructs to process files and command-line input - Conditionally execute code |
| Topic 8: Understand and use essential tools | - List, set, and change standard ugo/rwx permissions - Create, delete, copy, and move files and directories - Locate, read, and use system documentation - Log in and switch users in multi-user targets - Use input-output redirection - Access a shell prompt and issue commands with correct syntax - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Access remote systems using SSH - Create and edit text files - Use grep and regular expressions to analyze text - Create hard and soft links |
| Topic 9: Create and configure file systems | - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Extend existing logical volumes - Mount and unmount network file systems using NFS - Configure autofs - Diagnose and correct file permission problems |
| Topic 10: Manage basic networking | - Configure network services to start automatically at boot - Configure hostname resolution - Configure IPv4 and IPv6 addresses - Restrict network access using firewalld and firewall-cmd |
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NEW QUESTION # 48
Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set between 280 and 320. (This logical volume has been mounted in advance.)
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# vgdisplay
(Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend)
# lvdisplay (Check lv)
# lvextend -L +110M /dev/vg2/lv2
# resize2fs /dev/vg2/lv2
mount -a
(Verify)
------------------------------------------------------------------------------- (Decrease lvm)
# umount /media
# fsck -f /dev/vg2/lv2
# resize2fs -f /dev/vg2/lv2 100M
# lvreduce -L 100M /dev/vg2/lv2
# mount -a
# lvdisplay (Verify)
OR
# e2fsck -f /dev/vg1/lvm02
# resize2fs -f /dev/vg1/lvm02
# mount /dev/vg1/lvm01 /mnt
# lvreduce -L 1G -n /dev/vg1/lvm02
# lvdisplay (Verify)
NEW QUESTION # 49
There is a local logical volumes in your system, named with shrink and belong to VGSRV volume group, mount to the /shrink directory. The definition of size is 320 MB.
Requirement:
Reduce the logical volume to 220 MB without any loss of dat
a. The size is allowed between 200-260 MB after reducing.
Answer:
Explanation:
cd;umount /shrink
e2fsck -f /dev/mapper/vgsrv-shrink
resize2fs /dev/mapper/vgsrv-shrink 220M
lvreduce -L 220M /dev/mapper/vgsrv-shrink
mount -a
NEW QUESTION # 50
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:
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
NEW QUESTION # 51
Configure Your System to Use Default Repositories
The YUM repositories are available at http://content/rhel9.0/x86_64/dvd/BaseOS and http://content/rhel9.0/x86_64/dvd/AppStream. Configure your system to use
these locations as the default repositories.
Answer:
Explanation:
Solution:
Method 1:
# Copy the yum configuration file from node1.
[root@node2 ~]# scp root@node1:/etc/yum.repos.d/rhcsa.repo /etc/yum.repos.d/
Method 2:
[root@node2 ~]# vim /etc/yum.repos.d/rhcsa.repo
[Base]
name=Base
baseurl=http://content/rhel9.0/x86_64/dvd/BaseOS
enabled=1
gpgcheck=no
[App]
name=App
baseurl=http://content/rhel9.0/x86_64/dvd/AppStream
enabled=1
gpgcheck=no
# Verification
[root@node2 ~]# yum repoinfo
[root@node2 ~]# yum -y install ftp
NEW QUESTION # 52
SIMULATION
Create a logical volume
Create a new logical volume as required:
Name the logical volume as database, belongs to datastore of the volume group, size is 50 PE.
Expansion size of each volume in volume group datastore is 16MB.
Use ext3 to format this new logical volume, this logical volume should automatically mount to /mnt/ database
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation: fdisk -cu /dev/vda// Create a 1G partition, modified when needed 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
Restart and check all the questions requirements.
NEW QUESTION # 53
......
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