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| Section | Objectives |
|---|---|
| Topic 1: Manage software | - Configure RPM repositories - Install and remove Flatpak packages - Install and remove RPM packages - Configure Flatpak repositories |
| Topic 2: Manage security | - Default file permissions - Firewall configuration - SELinux file context restoration - SSH key-based authentication - SELinux enforcing and permissive modes - SELinux file and process contexts - SELinux Boolean settings - SELinux port labels |
| Topic 3: Create and configure file systems | - Extending logical volumes - NFS file systems - Autofs - VFAT, ext4, and XFS file systems - File permission troubleshooting |
| Topic 4: Understand and use essential tools | - Hard and soft links - Shell access and command syntax - File and directory management - Creating and editing text files - Remote system access using SSH - File archiving and compression - File permissions - System documentation - Text analysis with grep and regular expressions - Input and output redirection - Users and multi-user targets |
| Topic 5: Deploy, configure, and maintain systems | - Service management - Software installation and updates - Default boot target configuration - Time service clients - Task scheduling with at, cron, and systemd timers - Bootloader configuration |
| Topic 6: Manage users and groups | - Local group management - Password and password aging management - Privileged access configuration - Local user account management |
| Topic 7: Configure local storage | - Physical volumes - Logical volumes - File system mounting using UUID or labels - Adding partitions, logical volumes, and swap - GPT disk partitions - Volume groups |
| Topic 8: Manage basic networking | - Network services at boot - Firewall configuration with firewalld and firewall-cmd - Hostname resolution - IPv4 and IPv6 configuration |
| Topic 9: Create simple shell scripts | - Looping constructs - Processing command output - Conditional execution - Processing script inputs |
| Topic 10: Operate running systems | - Network services - Boot systems into different targets - Interrupt the boot process - Process scheduling - Process monitoring and termination - System logs and journals - Tuning profiles - Boot, reboot, and shut down systems - Secure file transfer |
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NEW QUESTION # 46
Part 1 (on Node1 Server)
Task 11 [Scheduling Future Tasks]
The user natasha must configure a cron job that runs daily at 14:23 local time and also the same cron job will run after every 2 minutes and executes:
/bin/echo hello
Answer:
Explanation:
* [root@node1 ~]# crontab -l -u natasha
no crontab for natasha
[root@node1 ~]# crontab -e -u natasha
23 14 * * * /bin/echo hello
*/2 * * * * /bin/echo 2min
crontab: installing new crontab
[root@node1 ~]# crontab -l -u natasha
23 14 * * * /bin/echo hello
*/2 * * * * /bin/echo 2min
[root@node1 ~]# systemctl status crond.service
* ### For Checking ###
[root@node1 ~]# tail -f /var/log/cron
Mar 23 13:23:48 node1 crontab[10636]: (root) REPLACE (natasha)
Mar 23 13:23:48 node1 crontab[10636]: (root) END EDIT (natasha)
Mar 23 13:23:50 node1 crontab[10638]: (root) LIST (natasha)
Mar 23 13:24:01 node1 crond[1349]: (root) FAILED (loading cron table)
Mar 23 13:24:02 node1 CROND[10673]: (natasha) CMD (/bin/echo 2min)
NEW QUESTION # 47
27. System Optimization Configuration
Choose the recommended tuned configuration set for your system and set it as default.
Answer:
Explanation:
Solution:
# Install and enable tuned
[root@node2 ~]# yum -y install tuned
[root@node2 ~]# systemctl enable tuned
[root@node2 ~]# systemctl restart tuned
# Check the recommended configuration scheme for the system
[root@node2 ~]# tuned-adm recommend
virtual-guest
# Switch to the specified configuration scheme
[root@node2 ~]# tuned-adm profile virtual-guest
# Check the current configuration scheme
[root@node2 ~]# tuned-adm active
Current active profile: virtual-guest
NEW QUESTION # 48
SIMULATION
One Logical Volume named /dev/test0/testvolume1 is created. The initial Size of that disk is 100MB now you required more 200MB. Increase the size of Logical Volume, size should be increase on online.
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation:
lvextend -L+200M /dev/test0/testvolume1 Use lvdisplay /dev/test0/testvolume1) ext2online -d /dev/test0/testvolume1 lvextend command is used the increase the size of Logical Volume. Other command lvresize command also here to resize. And to bring increased size on online we use the ext2online command.
NEW QUESTION # 49
What must be the first line of a plain text user-data configuration containing YAML configuration for cloud-init?
Answer: B
Explanation:
Explanation/Reference:
Reference https://cloudinit.readthedocs.io/en/latest/topics/examples.html
NEW QUESTION # 50
Who ever creates the files/directories on archive group owner should be automatically should be the same group owner of archive.
Answer:
Explanation:
chmod g+s /archive
Verify using: ls -ld /archive Permission should be like:
drwxrws--- 2 root sysuser 4096 Mar 16 18:08 /archive
If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory.
To set the SGID bit: chmod g+s directory
To Remove the SGID bit: chmod g-s directory
NEW QUESTION # 51
......
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