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| Section | Objectives |
|---|---|
| Understand and use essential tools | - File and directory management - File permissions - System documentation - Input and output redirection - File archiving and compression - Shell access and command syntax - Creating and editing text files - Users and multi-user targets - Hard and soft links - Text analysis with grep and regular expressions - Remote system access using SSH |
| Create simple shell scripts | - Conditional execution - Looping constructs - Processing command output - Processing script inputs |
| Operate running systems | - Network services - Boot, reboot, and shut down systems - Tuning profiles - Secure file transfer - Interrupt the boot process - Boot systems into different targets - Process monitoring and termination - System logs and journals - Process scheduling |
| Deploy, configure, and maintain systems | - Time service clients - Service management - Default boot target configuration - Bootloader configuration - Software installation and updates - Task scheduling with at, cron, and systemd timers |
| Manage basic networking | - IPv4 and IPv6 configuration - Firewall configuration with firewalld and firewall-cmd - Network services at boot - Hostname resolution |
| Manage security | - SSH key-based authentication - Firewall configuration - SELinux Boolean settings - Default file permissions - SELinux file and process contexts - SELinux enforcing and permissive modes - SELinux port labels - SELinux file context restoration |
| Create and configure file systems | - VFAT, ext4, and XFS file systems - File permission troubleshooting - Extending logical volumes - NFS file systems - Autofs |
| Manage software | - Install and remove RPM packages - Configure RPM repositories - Configure Flatpak repositories - Install and remove Flatpak packages |
| Manage users and groups | - Local group management - Privileged access configuration - Local user account management - Password and password aging management |
| Configure local storage | - Physical volumes - File system mounting using UUID or labels - Adding partitions, logical volumes, and swap - Volume groups - GPT disk partitions - Logical volumes |
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NEW QUESTION # 14
CORRECT TEXT
Configure a task: plan to run echo "file" command at 14:23 every day.
Answer:
Explanation:
(a) Created as administrator
# crontab -u natasha -e
23 14 * * * /bin/echo "file"
(b)Created as natasha
# su - natasha
$ crontab -e
23 14 * * * /bin/echo "file"
NEW QUESTION # 15
Add admin group and set gid=600
Answer:
Explanation:
# groupadd -g 600 admin
NEW QUESTION # 16
Your System is configured in 192.168.0.0/24 Network and your nameserver is 192.168.0.254. Make successfully resolve to server1.example.com.
Answer:
Explanation:
see explanation below.
Explanation
nameserver is specified in question,
1. Vi /etc/resolv.conf
nameserver 192.168.0.254
2. host server1.example.com
NEW QUESTION # 17
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 # 18
Create a user named alex, and the user id should be 1234, and the password should be alex111.
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# useradd -u 1234 alex
# passwd alex
alex111
alex111
OR
echo alex111|passwd -stdin alex
NEW QUESTION # 19
......
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