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| Section | Objectives |
|---|---|
| Topic 1: Create and configure file systems | - VFAT, ext4, and XFS file systems - NFS file systems - Autofs - File permission troubleshooting - Extending logical volumes |
| Topic 2: Create simple shell scripts | - Processing script inputs - Looping constructs - Conditional execution - Processing command output |
| Topic 3: Operate running systems | - Process monitoring and termination - Boot systems into different targets - System logs and journals - Tuning profiles - Boot, reboot, and shut down systems - Secure file transfer - Process scheduling - Network services - Interrupt the boot process |
| Topic 4: Manage software | - Install and remove RPM packages - Configure RPM repositories - Configure Flatpak repositories - Install and remove Flatpak packages |
| Topic 5: Configure local storage | - Adding partitions, logical volumes, and swap - Logical volumes - Physical volumes - GPT disk partitions - File system mounting using UUID or labels - Volume groups |
| Topic 6: Manage security | - SELinux file context restoration - SSH key-based authentication - Firewall configuration - SELinux file and process contexts - SELinux port labels - Default file permissions - SELinux Boolean settings - SELinux enforcing and permissive modes |
| Topic 7: Deploy, configure, and maintain systems | - Default boot target configuration - Software installation and updates - Bootloader configuration - Time service clients - Task scheduling with at, cron, and systemd timers - Service management |
| Topic 8: Understand and use essential tools | - Creating and editing text files - Hard and soft links - System documentation - File and directory management - Remote system access using SSH - Shell access and command syntax - File archiving and compression - File permissions - Input and output redirection - Users and multi-user targets - Text analysis with grep and regular expressions |
| Topic 9: Manage basic networking | - Hostname resolution - Firewall configuration with firewalld and firewall-cmd - Network services at boot - IPv4 and IPv6 configuration |
| Topic 10: Manage users and groups | - Password and password aging management - Privileged access configuration - Local user account management - Local group management |
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NEW QUESTION # 57
Part 1 (on Node1 Server)
Task 15 [Running Containers]
Create a container named logserver with the image rhel8/rsyslog found from the registry registry.domain15.example.com:5000 The container should run as the root less user shangril a. use redhat as password [sudo user] Configure the container with systemd services as the shangrila user using the service name, "container-logserver" so that it can be persistent across reboot.
Use admin as the username and admin123 as the credentials for the image registry.
Answer:
Explanation:
* [root@workstation ~]# ssh shangrila@node1
[shangrila@node1 ~]$ podman login registry.domain15.example.com:5000
Username: admin
Password:
Login Succeeded!
[shangrila@node1 ~]$ podman pull registry.domain15.example.com:5000/rhel8/rsyslog
[shangrila@node1 ~]$ podman run -d --name logserver registry.domain15.example.com:5000/rhel8/rsyslog
021b26669f39cc42b8e94eab886ba8293d6247bf68e4b0d76db2874aef284d6d
[shangrila@node1 ~]$ mkdir -p ~/.config/systemd/user
[shangrila@node1 ~]$ cd ~/.config/systemd/user
* [shangrila@node1 user]$ podman generate systemd --name logserver --files --new
/home/shangrila/.config/systemd/user/container-logserver.service
[shangrila@node1 ~]$ systemctl --user daemon-reload
[shangrila@node1 user]$ systemctl --user enable --now container-logserver.service
[shangrila@node1 ~]$ podman ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7d9f7a8a4d63 registry.domain15.example.com:5000/rhel8/rsyslog:latest /bin/rsyslog.sh 2 seconds ago logserver
[shangrila@node1 ~]$ sudo reboot
[shangrila@node1 ~]$ cd .config/systemd/user
[shangrila@node1 user]$ systemctl --user status
NEW QUESTION # 58
Create a new swap file of size 512 MiB at /swapfile, activate it, and make it persistent.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
dd if=/dev/zero of=/swapfile bs=1M count=512
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo "/swapfile swap swap defaults 0 0" > > /etc/fstab
swapon --show
Detailed Explanation:
* dd creates the file.
* chmod 600 protects swap contents.
* mkswap prepares the file as swap.
* swapon activates it now.
* /etc/fstab ensures it is enabled at boot.
NEW QUESTION # 59
SELinux must run in force mode.
Answer:
Explanation:
see explanation below.
Explanation
/etc/sysconfig/selinux
SELINUX=enforcing
NEW QUESTION # 60
CORRECT TEXT
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:
# 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 # 61
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 # 62
......
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