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| Section | Objectives |
|---|---|
| Manage basic networking | - Configure IPv4 and IPv6 addresses - Configure hostname resolution - Configure network services to start automatically at boot - Restrict network access using firewalld and firewall-cmd |
| Create simple shell scripts | - Use looping constructs to process files and command-line input - Process script inputs - Process output of shell commands within a script - Conditionally execute code |
| Manage users and groups | - Create, delete, and modify local user accounts - Change passwords and adjust password aging for local users - Create, delete, and modify local groups and group memberships - Configure privileged access |
| Manage software | - Configure access to RPM repositories - Install and remove RPM software packages - Configure access to Flatpak repositories - Install and remove Flatpak software packages |
| Create and configure file systems | - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Extend existing logical volumes - Mount and unmount network file systems using NFS - Configure autofs - Diagnose and correct file permission problems |
| Manage security | - Configure firewall settings using firewall-cmd and firewalld - Configure key-based authentication for SSH - Use Boolean settings to modify SELinux settings - Manage SELinux port labels - Restore default file contexts - Manage default file permissions - Set enforcing and permissive modes for SELinux - List and identify SELinux file and process contexts |
| Operate running systems | - Start, stop, and check the status of network services - Boot systems into different targets manually - Adjust process scheduling - Manage tuning profiles - Securely transfer files between systems - Identify CPU and memory intensive processes and kill processes - Locate and interpret system log files and journals - Boot, reboot, and shut down a system normally - Interrupt the boot process to gain access to a system - Preserve system journals |
| Understand and use essential tools | - Use grep and regular expressions to analyze text - Create and edit text files - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Access a shell prompt and issue commands with correct syntax - Access remote systems using SSH - Log in and switch users in multi-user targets - List, set, and change standard ugo/rwx permissions - Locate, read, and use system documentation - Create hard and soft links - Create, delete, copy, and move files and directories - Use input-output redirection |
| Configure local storage | - Create and remove physical volumes - Create and delete logical 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 - Add new partitions, logical volumes, and swap non-destructively |
| Deploy, configure, and maintain systems | - Configure systems to boot into a specific target automatically - Schedule tasks using at, cron, and systemd timer units - Start and stop services and configure services to start automatically at boot - Install and update software packages - Configure time service clients - Modify the system bootloader |
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NEW QUESTION # 48
Install a FTP server, and request to anonymous download from /var/ftp/pub catalog. (it needs you to configure yum direct to the already existing file server.)
Answer:
Explanation:
# cd /etc/yum.repos.d
# vim local.repo
[local]
name=local.repo
baseurl=file:///mnt
enabled=1
gpgcheck=0
# yum makecache
# yum install -y vsftpd
# service vsftpd restart
# chkconfig vsftpd on
# chkconfig --list vsftpd
# vim /etc/vsftpd/vsftpd.conf
anonymous_enable=YES
NEW QUESTION # 49
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:
see explanation below.
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 # 50
Create a Container Image
As the user "wallah," download the Containerfile from http://classroom/Containerfile.
Do not modify the content of this file. Build an image named "pdf."
Answer:
Explanation:
# Install container management tools
[root@node1 ~]# dnf -y install container-tools
# Execute operations as the user wallah
[root@node1 ~]# ssh wallah@localhost
# Download the container build file
[wallah@node1 ~]# wget http://classroom/Containerfile
# Log in to the image registry
[wallah@node1 ~]# podman login -u admin -p redhat321 registry.lab.example.com
# Build the container image using the Containerfile in the current directory, with the image name "pdf"
[wallah@node1 ~]# podman build -t pdf .
# View the images
[wallah@node1 ~]$ podman images
REPOSITORY TAG IMAGE ID CREATED SIZE
localhost/pdf latest 1d6e7ea71460 31 seconds ago 300 MB
registry.lab.example.com/ubi9-beta/ubi latest 28b0a4b69d9b 2 years ago 229 MB
NEW QUESTION # 51
Configure your Host Name, IP Address, Gateway and DNS.
Host name: station.domain40.example.com
/etc/sysconfig/network
hostname=abc.com
hostname abc.com
IP Address:172.24.40.40/24
Gateway172.24.40.1
DNS:172.24.40.1
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# cd /etc/syscofig/network-scripts/
# ls
# vim ifcfg-eth0 (Configure IP Address, Gateway and DNS) IPADDR=172.24.40.40 GATEWAY=172.24.40.1
DNS1=172.24.40.1
# vim /etc/sysconfig/network
(Configure Host Name)
HOSTNAME= station.domain40.example.com
OR
Graphical Interfaces:
System->Preference->Network Connections (Configure IP Address, Gateway and DNS) Vim /etc/ sysconfig/network
(Configure Host Name)
NEW QUESTION # 52
13. Create a Container Image
As the user "wallah," download the Containerfile from http://classroom/Containerfile.
Do not modify the content of this file. Build an image named "pdf."
Answer:
Explanation:
Solution:
# Install container management tools
[root@node1 ~]# dnf -y install container-tools
# Execute operations as the user wallah
[root@node1 ~]# ssh wallah@localhost
# Download the container build file
[wallah@node1 ~]# wget http://classroom/Containerfile
# Log in to the image registry
[wallah@node1 ~]# podman login -u admin -p redhat321 registry.lab.example.com
# Build the container image using the Containerfile in the current directory, with the image name "pdf"
[wallah@node1 ~]# podman build -t pdf .
# View the images
[wallah@node1 ~]$ podman images
REPOSITORY TAG IMAGE ID CREATED SIZE
localhost/pdf latest 1d6e7ea71460 31 seconds ago 300 MB
registry.lab.example.com/ubi9-beta/ubi latest 28b0a4b69d9b 2 years ago 229 MB
NEW QUESTION # 53
......
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