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| Section | Objectives |
|---|---|
| Topic 1: Operate running systems | - Preserve system journals - Boot, reboot, and shut down a system normally - Manage tuning profiles - Interrupt the boot process to gain access to a system - Boot systems into different targets manually - Start, stop, and check the status of network services - Identify CPU and memory intensive processes and kill processes - Adjust process scheduling - Locate and interpret system log files and journals - Securely transfer files between systems |
| Topic 2: Deploy, configure, and maintain systems | - Modify the system bootloader - Configure systems to boot into a specific target automatically - Install and update software packages - Start and stop services and configure services to start automatically at boot - Configure time service clients - Schedule tasks using at, cron, and systemd timer units |
| Topic 3: Manage software | - Configure access to RPM repositories - Configure access to Flatpak repositories - Install and remove Flatpak software packages - Install and remove RPM software packages |
| Topic 4: Create simple shell scripts | - Process output of shell commands within a script - Use looping constructs to process files and command-line input - Process script inputs - Conditionally execute code |
| Topic 5: Manage security | - Use Boolean settings to modify SELinux settings - Manage SELinux port labels - Configure key-based authentication for SSH - Configure firewall settings using firewall-cmd and firewalld - List and identify SELinux file and process contexts - Set enforcing and permissive modes for SELinux - Restore default file contexts - Manage default file permissions |
| Topic 6: Configure local storage | - Add new partitions, logical volumes, and swap non-destructively - Create and remove physical volumes - List, create, and delete partitions on GPT disks - Configure systems to mount file systems at boot by UUID or label - Assign physical volumes to volume groups - Create and delete logical volumes |
| Topic 7: Create and configure file systems | - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Diagnose and correct file permission problems - Mount and unmount network file systems using NFS - Extend existing logical volumes - Configure autofs |
| Topic 8: Manage users and groups | - Change passwords and adjust password aging for local users - Create, delete, and modify local groups and group memberships - Create, delete, and modify local user accounts - Configure privileged access |
| Topic 9: Manage basic networking | - Configure hostname resolution - Configure IPv4 and IPv6 addresses - Restrict network access using firewalld and firewall-cmd - Configure network services to start automatically at boot |
| Topic 10: Understand and use essential tools | - Create, delete, copy, and move files and directories - List, set, and change standard ugo/rwx permissions - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Locate, read, and use system documentation - Create hard and soft links - Access a shell prompt and issue commands with correct syntax - Create and edit text files - Access remote systems using SSH - Log in and switch users in multi-user targets - Use input-output redirection - Use grep and regular expressions to analyze text |
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NEW QUESTION # 43
Create a script to search for files
* Create a script named myresearch
* Place the script under /usr/local/bin
* The script is used to search for all files under /usr that are smaller than 10 MB and have group write permission, and place these files into /root/myfiles
Answer:
Explanation:
Solution:
mkdir /root/myfiles
vim /usr/local/bin/myresearch
#!/bin/bash
find /usr -type f -and -size -10M -and -perm -2000 -exec cp -a {} /root/myfiles \;
:wq
chmod +x /usr/local/bin/myresearch
bash /usr/local/bin/myresearch
ll -h /root/myfiles
Script explanation:
(#!/bin/bash): #! is a conventional marker that tells the system which interpreter should be used to execute the script.
/bin/bash means the script is executed using the default Bash shell.
Here, a for loop is needed to iterate over the found GIDs (group IDs) for processing.
(awk -F':' '{print $3}' /etc/group):
awk is used to split and process text.
-F specifies the field separator.
":" indicates that the colon is used as the delimiter.
{print $3} prints the third field (the group ID).
NEW QUESTION # 44
We are working on /data initially the size is 2GB. The /dev/test0/lvtestvolume is mount on /dat a. Now you required more space on /data but you already added all disks belong to physical volume. You saw that you have unallocated space around 5 GB on your harddisk. Increase the size of lvtestvolume by 5GB.
Answer:
Explanation:
Create a partition having size 5 GB and change the syste id '8e'.
use partprobe command
pvcreate /dev/hda9 Suppose your partition number is hda9.
vgextend test0 /dev/hda9 vgextend command add the physical disk on volume group.
lvextend -L+5120M /dev/test0/lvtestvolume
verify using lvdisplay /dev/test0/lvtestvolume.
NEW QUESTION # 45
11. Find String
Find all lines containing the string "ng" in the file /usr/share/xml/iso-codes/iso_639_3.xml.
Save copies of all these lines to /root/list in the root directory.
/root/list must not contain empty lines, and all lines must be exact copies of the original lines in /usr/share/xml/iso-codes/iso_639_3.xml.
Answer:
Explanation:
Solution:
[root@node1 ~]# grep ng /usr/share/xml/iso-codes/iso_639_3.xml
[root@node1 ~]# grep ng /usr/share/xml/iso-codes/iso_639_3.xml > /root/list
# Verification
[root@node1 ~]# cat /root/list
NEW QUESTION # 46
An Ansible variable file contains the following content:
myapp:
option1: one
Which of the following strings can be used to reference the defined variable? (Choose two correct answers).
Answer: A,C
NEW QUESTION # 47
Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).
Answer:
Explanation:
see explanation below.
Explanation
* if=/dev/zero of=/swapfile bs=1M count=600 mkswap /swapfile
/etc/fstab:
/swapfile swap swap defaults 0 0 mount -a
NEW QUESTION # 48
......
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