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| Section | Objectives |
|---|---|
| Topic 1: Manage users and groups | - Privileged access configuration - Local group management - Local user account management - Password and password aging management |
| Topic 2: Configure local storage | - Physical volumes - File system mounting using UUID or labels - GPT disk partitions - Volume groups - Adding partitions, logical volumes, and swap - Logical volumes |
| Topic 3: Operate running systems | - Interrupt the boot process - Process monitoring and termination - Network services - Boot, reboot, and shut down systems - System logs and journals - Secure file transfer - Tuning profiles - Process scheduling - Boot systems into different targets |
| Topic 4: Create simple shell scripts | - Processing script inputs - Processing command output - Looping constructs - Conditional execution |
| Topic 5: Create and configure file systems | - Extending logical volumes - NFS file systems - File permission troubleshooting - VFAT, ext4, and XFS file systems - Autofs |
| Topic 6: Deploy, configure, and maintain systems | - Software installation and updates - Default boot target configuration - Task scheduling with at, cron, and systemd timers - Service management - Time service clients - Bootloader configuration |
| Topic 7: Manage basic networking | - Hostname resolution - Network services at boot - IPv4 and IPv6 configuration - Firewall configuration with firewalld and firewall-cmd |
| Topic 8: Manage security | - Firewall configuration - SELinux file and process contexts - SELinux Boolean settings - SELinux enforcing and permissive modes - Default file permissions - SELinux file context restoration - SELinux port labels - SSH key-based authentication |
| Topic 9: Understand and use essential tools | - File permissions - Shell access and command syntax - Input and output redirection - Remote system access using SSH - File archiving and compression - System documentation - Hard and soft links - Creating and editing text files - File and directory management - Text analysis with grep and regular expressions - Users and multi-user targets |
| Topic 10: Manage software | - Install and remove RPM packages - Configure Flatpak repositories - Install and remove Flatpak packages - Configure RPM repositories |
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NEW QUESTION # 62
User mary must configure a task.
Requirement: The local time at 14:23 every day echo "Hello World.".
Answer:
Explanation:
crontab -u mary -e
23 14 * * * echo "Hello World."
NEW QUESTION # 63
Add users: user2, user3.
The Additional group of the two users: user2, user3 is the admin group Password: redhat
Answer:
Explanation:
# useradd -G admin user2
# useradd -G admin user3
# passwd user2
redhat
# passwd user3
redhat
NEW QUESTION # 64
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:
see explanation below.
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 # 65
Create a catalog under /home named admins. Its respective group is requested to be the admin group. The group users could read and write, while other users are not allowed to access it. The files created by users from the same group should also be the admin group.
Answer:
Explanation:
see explanation below.
Explanation
# cd /home/
# mkdir admins /
# chown .admin admins/
# chmod 770 admins/
# chmod g+s admins/
NEW QUESTION # 66
Debugging SELinux
A web server running on non-standard port 82 encounters issues while serving content. Debug and resolve the problem to meet the following conditions:
- The web server on the system can serve HTML files hosted in /var/www/html (Note: Do not delete or modify existing file contents)
- The web server can serve content on port 82
- The web server can start automatically at system boot
Answer:
Explanation:
# Check which package provides the semanage command
[root@node1 ~]# yum provides "*/semanage"
# Install the semanage command
[root@node1 ~]# yum -y install policycoreutils-python-utils
[root@node1 ~]# semanage port -l |grep http
[root@node1 ~]# semanage port -a -t http_port_t -p tcp 82
# Alternatively, you can use man semanage port, then search for EXAMPLE.
[root@node1 ~]# systemctl restart httpd
[root@node1 ~]# systemctl enable httpd
# Verification, seeing the source code indicates correctness (mandatory operation)
[root@node1 ~]# curl http://node1.domain250.example.com:82
NEW QUESTION # 67
......
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