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| Section | Objectives |
|---|---|
| Topic 1: Operate running systems | - Preserve system journals - Boot, reboot, and shut down a system normally - Interrupt the boot process to gain access to a system - Securely transfer files between systems - Adjust process scheduling - Start, stop, and check the status of network services - Boot systems into different targets manually - Locate and interpret system log files and journals - Identify CPU and memory intensive processes and kill processes - Manage tuning profiles |
| Topic 2: Manage security | - List and identify SELinux file and process contexts - Set enforcing and permissive modes for SELinux - Use Boolean settings to modify SELinux settings - Restore default file contexts - Configure firewall settings using firewall-cmd and firewalld - Manage default file permissions - Manage SELinux port labels - Configure key-based authentication for SSH |
| Topic 3: Create simple shell scripts | - Process output of shell commands within a script - Process script inputs - Conditionally execute code - Use looping constructs to process files and command-line input |
| Topic 4: Manage users and groups | - Configure privileged access - Change passwords and adjust password aging for local users - Create, delete, and modify local user accounts - Create, delete, and modify local groups and group memberships |
| Topic 5: Configure local storage | - Create and delete logical volumes - Add new partitions, logical volumes, and swap non-destructively - Create and remove physical volumes - List, create, and delete partitions on GPT disks - Assign physical volumes to volume groups - Configure systems to mount file systems at boot by UUID or label |
| Topic 6: Create and configure file systems | - Mount and unmount network file systems using NFS - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Configure autofs - Extend existing logical volumes - Diagnose and correct file permission problems |
| Topic 7: Understand and use essential tools | - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Access remote systems using SSH - Use grep and regular expressions to analyze text - Create hard and soft links - List, set, and change standard ugo/rwx permissions - Create and edit text files - Create, delete, copy, and move files and directories - Access a shell prompt and issue commands with correct syntax - Locate, read, and use system documentation - Log in and switch users in multi-user targets - Use input-output redirection |
| Topic 8: Manage software | - Configure access to RPM repositories - Configure access to Flatpak repositories - Install and remove RPM software packages - Install and remove Flatpak software packages |
| Topic 9: Deploy, configure, and maintain systems | - Configure time service clients - Schedule tasks using at, cron, and systemd timer units - Configure systems to boot into a specific target automatically - Install and update software packages - Modify the system bootloader - Start and stop services and configure services to start automatically at boot |
| Topic 10: Manage basic networking | - Restrict network access using firewalld and firewall-cmd - Configure network services to start automatically at boot - Configure hostname resolution - Configure IPv4 and IPv6 addresses |
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NEW QUESTION # 53
There is a local logical volumes in your system, named with shrink and belong to VGSRV volume group, mount to the /shrink directory. The definition of size is 320 MB.
Requirement:
Reduce the logical volume to 220 MB without any loss of data. The size is allowed between 200-260 MB after reducing.
Answer:
Explanation:
see explanation below.
Explanation
cd;umount /shrink
e2fsck -f /dev/mapper/vgsrv-shrink
resize2fs /dev/mapper/vgsrv-shrink 220M
lvreduce -L 220M /dev/mapper/vgsrv-shrink
mount -a
NEW QUESTION # 54
Find the rows that contain abcde from file /etc/testfile, and write it to the file/tmp/testfile, and the sequence is requested as the same as /etc/testfile.
Answer:
Explanation:
see explanation below.
Explanation
# cat /etc/testfile | while read line;
do
echo $line | grep abcde | tee -a /tmp/testfile
done
OR
grep `abcde' /etc/testfile > /tmp/testfile
NEW QUESTION # 55
Configure iptables, there are two domains in the network, the address of local domain is 172.24.0.0/16 other domain is 172.25.0.0/16, now refuse domain 172.25.0.0/16 to access the server.
Answer:
Explanation:
below
iptables -F
service iptables save
iptables -A INPUT -s 172.25.0.0/16 -j REJECT
service iptables save
service iptables restart
NEW QUESTION # 56
There is a server having 172.24.254.254 and 172.25.254.254. Your System lies on 172.24.0.0/16. Make successfully ping to 172.25.254.254 by Assigning following IP: 172.24.0.x where x is your station number.
Answer:
Explanation:
Use netconfig command
Enter the IP Address as given station number by your examiner: example: 172.24.0.1 Enter Subnet Mask Enter Default Gateway and primary name server press on ok ifdown eth0 ifup eth0 verify using ifconfig In the lab server is playing the role of router, IP forwarding is enabled. Just set the Correct IP and gateway, you can ping to 172.25.254.254.
NEW QUESTION # 57
Create a 512M partition, make it as ext4 file system, mounted automatically under /mnt/data and which take effect automatically at boot-start.
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# fdisk /dev/vda
n
+512M
w
# partprobe /dev/vda
# mkfs -t ext4 /dev/vda5
# mkdir -p /data
# vim /etc/fstab
/dev/vda5 /data ext4 defaults 0 0
# mount -a
NEW QUESTION # 58
......
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