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| Section | Objectives |
|---|---|
| Manage security | - SELinux Boolean settings - SELinux file context restoration - Firewall configuration - SELinux enforcing and permissive modes - SSH key-based authentication - Default file permissions - SELinux port labels - SELinux file and process contexts |
| Manage basic networking | - IPv4 and IPv6 configuration - Network services at boot - Firewall configuration with firewalld and firewall-cmd - Hostname resolution |
| Configure local storage | - Volume groups - Logical volumes - Physical volumes - GPT disk partitions - Adding partitions, logical volumes, and swap - File system mounting using UUID or labels |
| Operate running systems | - Tuning profiles - Boot, reboot, and shut down systems - Interrupt the boot process - Boot systems into different targets - Secure file transfer - System logs and journals - Network services - Process monitoring and termination - Process scheduling |
| Understand and use essential tools | - Creating and editing text files - System documentation - Remote system access using SSH - Text analysis with grep and regular expressions - Input and output redirection - File permissions - Shell access and command syntax - File and directory management - Users and multi-user targets - File archiving and compression - Hard and soft links |
| Manage users and groups | - Privileged access configuration - Local user account management - Password and password aging management - Local group management |
| Deploy, configure, and maintain systems | - Bootloader configuration - Default boot target configuration - Software installation and updates - Time service clients - Service management - Task scheduling with at, cron, and systemd timers |
| Create simple shell scripts | - Looping constructs - Processing command output - Processing script inputs - Conditional execution |
| Manage software | - Install and remove Flatpak packages - Configure Flatpak repositories - Install and remove RPM packages - Configure RPM repositories |
| Create and configure file systems | - File permission troubleshooting - NFS file systems - Extending logical volumes - Autofs - VFAT, ext4, and XFS file systems |
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NEW QUESTION # 25
Configure Cron Job
Configure a cron job to automatically execute /usr/bin/echo hello every day at 14:23 for the user harry.
Answer:
Explanation:
[root@node1 ~]# systemctl status crond
[root@node1 ~]# systemctl enable crond
[root@node1 ~]# crontab -e -u harry
23 14 * * * /usr/bin/echo hello
# Verification
[root@node1 ~]# crontab -l -u harry
NEW QUESTION # 26
24. Adjust Logical Volume Size
Adjust the size of the logical volume "vo" and its filesystem to 300 MiB, ensuring that the filesystem content remains unchanged.
Note: Partition sizes rarely match the requested size exactly, so a range of 290 MiB to 310 MiB is acceptable.
For ext4 filesystems, use resize2fs to take effect immediately; for xfs filesystems, use xfs_growfs to take effect immediately.
Answer:
Explanation:
Solution:
# Scan logical volumes
[root@node2 ~]# lvscan
# Extend the logical volume. With -rL, the filesystem space is adjusted immediately after extending the volume.
[root@node2 ~]# lvextend -rL 300M /dev/myvol/vo
# Check the changes
[root@node2 ~]# lsblk
[root@node2 ~]# lvs
# Verification
[root@node2 ~]# df -h
NEW QUESTION # 27
06. Create a Collaborative Directory
Create a shared directory /home/managers with the following characteristics:
- The group ownership of /home/managers is sysmgrs.
- The directory should be readable, writable, and executable by members of the sysmgrs group, but should not have read or write permissions for any other users
(of course, the root user has access to all files and folders).
- Any files created within /home/managers should automatically inherit the group ownership set to the sysmgrs group.
Answer:
Explanation:
Solution:
[root@node1 ~]# mkdir /home/managers
[root@node1 ~]# chgrp sysmgrs /home/managers
[root@node1 ~]# chmod 2770 /home/managers
# Verification
[root@node1 ~]# ll -d /home/managers
NEW QUESTION # 28
There are two different networks 192.168.0.0/24 and 192.168.1.0/24. Where 192.168.0.254 and
192.168.1.254 IP Address are assigned on Server. Verify your network settings by pinging 192.168.1.0/24 Network's Host.
Answer:
Explanation:
see explanation below.
Explanation
* vi /etc/sysconfing/network NETWORKING=yes HOSTNAME=station?.example.com GATEWAY=192.168.0.254 service network restart
2.vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=X.X.X.X
NETMASK=X.X.X.X
GATEWAY=192.168.0.254
ifdown eth0
ifup eth0
NEW QUESTION # 29
Configure User Account
Configure the user account "manalo" with the user ID 3533. The password for this user should be "flectrag".
Answer:
Explanation:
Solution:
[root@node1 ~]# useradd -u 3533 manalo
[root@node1 ~]# echo flectrag | passwd --stdin manalo
NEW QUESTION # 30
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