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| Section | Objectives |
|---|---|
| Topic 1: Manage software | - Install and remove Flatpak software packages - Configure access to Flatpak repositories - Install and remove RPM software packages - Configure access to RPM repositories |
| Topic 2: Create simple shell scripts | - Use looping constructs to process files and command-line input - Conditionally execute code - Process script inputs - Process output of shell commands within a script |
| Topic 3: Understand and use essential tools | - Create hard and soft links - Access remote systems using SSH - List, set, and change standard ugo/rwx permissions - Use grep and regular expressions to analyze text - Locate, read, and use system documentation - Create and edit text files - Access a shell prompt and issue commands with correct syntax - Use input-output redirection - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Create, delete, copy, and move files and directories - Log in and switch users in multi-user targets |
| Topic 4: Manage basic networking | - Configure hostname resolution - Configure network services to start automatically at boot - Restrict network access using firewalld and firewall-cmd - Configure IPv4 and IPv6 addresses |
| Topic 5: Deploy, configure, and maintain systems | - Modify the system bootloader - Install and update software packages - Schedule tasks using at, cron, and systemd timer units - Start and stop services and configure services to start automatically at boot - Configure systems to boot into a specific target automatically - Configure time service clients |
| Topic 6: Operate running systems | - Boot systems into different targets manually - Preserve system journals - Adjust process scheduling - Interrupt the boot process to gain access to a system - Identify CPU and memory intensive processes and kill processes - Securely transfer files between systems - Start, stop, and check the status of network services - Boot, reboot, and shut down a system normally - Locate and interpret system log files and journals - Manage tuning profiles |
| Topic 7: Manage users and groups | - Configure privileged access - Create, delete, and modify local groups and group memberships - Change passwords and adjust password aging for local users - Create, delete, and modify local user accounts |
| Topic 8: Manage security | - Configure key-based authentication for SSH - Manage SELinux port labels - Restore default file contexts - Configure firewall settings using firewall-cmd and firewalld - Set enforcing and permissive modes for SELinux - List and identify SELinux file and process contexts - Use Boolean settings to modify SELinux settings - Manage default file permissions |
| Topic 9: Create and configure file systems | - Configure autofs - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Extend existing logical volumes - Mount and unmount network file systems using NFS - Diagnose and correct file permission problems |
| Topic 10: Configure local storage | - Assign physical volumes to volume groups - Add new partitions, logical volumes, and swap non-destructively - Create and delete logical volumes - Configure systems to mount file systems at boot by UUID or label - List, create, and delete partitions on GPT disks - Create and remove physical volumes |
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NEW QUESTION # 47
Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original swap partition.
Answer:
Explanation:
see explanation below.
Explanation
# fdisk /dev/sda
p
(check Partition table)
n
(create new partition: press e to create extended partition, press p to create the main partition, and the extended partition is further divided into logical partitions) Enter
+2G t
8 I
82
W
partx -a /dev/sda
partprobe
mkswap /dev/sda8
Copy UUID
swapon -a
vim /etc/fstab
UUID=XXXXX swap swap defaults 0 0
(swapon -s)
NEW QUESTION # 48
SIMULATION
Configure your Host Name, IP Address, Gateway and DNS.
Host name: dtop5.dn.ws.com
IP Address: 172.28.10.5/4
Gateway: 172.28.10.1
DNS: 172.28.10.1
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation:
1. Configure Host Name
vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=dtop5.dn.ws.com GATEWAY=172.28.10.1
2. Configure IP Address, Gateway and DNS
Configure the network by Network Manager:
Note: Please remember to choose two options:
Connect automatically
Available to all users
Click "Apply", save and exit, and restart your network services:
# Service network restart
3. Validate these profiles:
a) Check gateway: # vim / etc / sysconfig / network
NETWORKING=yes
HOSTNAME=dtop5.dn.ws.com
GATEWAY=172.28.10.1
b) Check Host Name: # vim /etc/hosts
c) Check DNS: # vim /etc/resolv.conf
# Generated by NetworkManager
Search dn.ws.com
Nameserver 172.28.10.1
d) Check Gateway: # vim /etc/sysconfig/network-scripts/ifcfg-eth0
NEW QUESTION # 49
04. Create User Accounts
Create the following user accounts, ensuring the checkboxes are enabled:
- Group named sysmgrs
- User natasha, belonging to the sysmgrs group as a secondary group
- User harry, belonging to the sysmgrs group as a secondary group
- User sarah, with no access to interactive shell on the system and not a member of sysmgrs
- Passwords for natasha, harry, and sarah should all be "flectrag".
Answer:
Explanation:
Solution:
[root@node1 ~]# groupadd sysmgrs
[root@node1 ~]# useradd -G sysmgrs natasha
[root@node1 ~]# useradd -G sysmgrs harry
[root@node1 ~]# useradd -s /bin/false sarah
[root@node1 ~]# echo tianyun |passwd --stdin natasha
[root@node1 ~]# echo tianyun |passwd --stdin harry
[root@node1 ~]# echo tianyun |passwd --stdin sarah
NEW QUESTION # 50
Part 2 (on Node2 Server)
Task 6 [Implementing Advanced Storage Features]
Add a new disk to your virtual machine with a ize of 10 GiB
On this disk, create a VDO volume with a size of 50 GiB and mount it persistently on /vbread with xfs filesystem
Answer:
Explanation:
* [root@node2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vdd 252:48 0 5G 0 disk
vde 252:64 0 10G 0 disk
[root@node2 ~]# yum install kmod-kvdo vdo
[root@node2 ~]# systemctl enable --now vdo
[root@node2 ~]# systemctl start vdo
[root@node2 ~]# systemctl status vdo
[root@node2 ~]# vdo create --name=vdo1 --device=/dev/vde --vdoLogicalSize=50G
[root@node2 ~]# vdostats --hu
Device Size Used Available Use% Space saving%
/dev/mapper/vdo1 10.0G 4.0G 6.0G 40% N/A
[root@node2 ~]# mkfs.xfs -K /dev/mapper/vdo1
* [root@node2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vde 252:64 0 10G 0 disk
└─vdo1 253:4 0 50G 0 vdo
[root@node2 ~]# mkdir /vbread
[root@node2 ~]# blkid
/dev/mapper/vdo1: UUID="1ec7a341-6051-4aed-8a2c-4d2d61833227" BLOCK_SIZE="4096" TYPE="xfs"
[root@node2 ~]# vim /etc/fstab
UUID=1ec7a341-6051-4aed-8a2c-4d2d61833227 /vbread xfs defaults,x-systemd.requires=vdo.service 0 0
[root@node2 ~]# mount /dev/mapper/vdo1 /vbread/
[root@node2 ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vdo1 xfs 50G 390M 50G 1% /vbread
NEW QUESTION # 51
Create Archive
Create a tar archive named /root/backup.tar.bz2, which should contain the contents of /usr/local. The tar archive must be compressed using bzip2.
Answer:
Explanation:
[root@node1 ~]# yum -y install bzip2
[root@node1 ~]# tar -jcvPf /root/backup.tar.bz2 /usr/local
# Verification
[root@node1 ~]# file /root/backup.tar.bz
NEW QUESTION # 52
......
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