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| Section | Objectives |
|---|---|
| Topic 1: 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 2: Create and configure file systems | - Extend existing logical volumes - Mount and unmount network file systems using NFS - Configure autofs - Diagnose and correct file permission problems - Create, mount, unmount, and use VFAT, ext4, and XFS file systems |
| Topic 3: Operate running systems | - Preserve system journals - Securely transfer files between systems - Start, stop, and check the status of network services - Adjust process scheduling - Identify CPU and memory intensive processes and kill processes - Boot, reboot, and shut down a system normally - Interrupt the boot process to gain access to a system - Boot systems into different targets manually - Locate and interpret system log files and journals - Manage tuning profiles |
| Topic 4: Manage security | - List and identify SELinux file and process contexts - Configure firewall settings using firewall-cmd and firewalld - Configure key-based authentication for SSH - Manage default file permissions - Restore default file contexts - Manage SELinux port labels - Use Boolean settings to modify SELinux settings - Set enforcing and permissive modes for SELinux |
| Topic 5: Deploy, configure, and maintain systems | - Install and update software packages - Configure time service clients - Start and stop services and configure services to start automatically at boot - Configure systems to boot into a specific target automatically - Modify the system bootloader - Schedule tasks using at, cron, and systemd timer units |
| Topic 6: Manage users and groups | - Create, delete, and modify local groups and group memberships - Configure privileged access - Change passwords and adjust password aging for local users - Create, delete, and modify local user accounts |
| Topic 7: Configure local storage | - Assign physical volumes to volume groups - List, create, and delete partitions on GPT disks - 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 - Create and remove physical volumes |
| Topic 8: Understand and use essential tools | - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Create, delete, copy, and move files and directories - Access remote systems using SSH - Use input-output redirection - Create hard and soft links - Use grep and regular expressions to analyze text - List, set, and change standard ugo/rwx permissions - Locate, read, and use system documentation - Access a shell prompt and issue commands with correct syntax - Create and edit text files - Log in and switch users in multi-user targets |
| Topic 9: Create simple shell scripts | - Use looping constructs to process files and command-line input - Process output of shell commands within a script - Process script inputs - Conditionally execute code |
| Topic 10: Manage software | - Configure access to RPM repositories - Configure access to Flatpak repositories - Install and remove Flatpak software packages - Install and remove RPM software packages |
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65. Frage
Add 3 users: harry, natasha, tom.
The requirements: The Additional group of the two users: harry, Natasha is the admin group. The user: tom's login shell should be non-interactive.
Antwort:
Begründung:
see explanation below.
Explanation
# useradd -G admin harry
# useradd -G admin natasha
# useradd -s /sbin/nologin tom
# id harry;id Natasha (Show additional group)
# cat /etc/passwd
(Show the login shell)
OR
# system-config-users
66. Frage
Install the Kernel Upgrade.
Install suitable kernel update from:
http://server.domain11.example.com/pub/updates.
Following requirements must be met:
Updated kernel used as the default kernel of system start-up.
The original kernel is still valid and can be guided when system starts up.
Antwort:
Begründung:
see explanation below.
Explanation
Using the browser open the URL in the question, download kernel file to root or home directory.
uname -r// check the current kernel version
rpm -ivh kernel-*.rpm
vi /boot/grub.conf// check
Some questions are: Install and upgrade the kernel as required. To ensure that grub2 is the default item for startup.
Yum
repo : http://content.example.com/rhel7.0/x86-64/errata
OR
uname -r // check kernel
Yum-config-manager
--add-repo="http://content.example.com/rhel7.0/x86-64/ errata"
Yum clean all
Yum list kernel// install directly
Yum -y install kernel// stuck with it, do not pipe! Please do not pipe!
Default enable new kernel grub2-editenv list// check
Modify grub2-set-default "kernel full name"
Grub2-mkconfig -o/boot/grub2/grub.cfg// Refresh
67. Frage
Add users: user2, user3.
The Additional group of the two users: user2, user3 is the admin group Password: redhat
Antwort:
Begründung:
# useradd -G admin user2
# useradd -G admin user3
# passwd user2
redhat
# passwd user3
redhat
68. Frage
Add user: user1, set uid=601
Password: redhat
The user's login shell should be non-interactive.
Antwort:
Begründung:
see explanation below.
Explanation
# useradd -u 601 -s /sbin/nologin user1
# passwd user1
redhat
69. Frage
Configure an application
* Configure an application named rhcsa.
* When this application is run as the user natasha, it should display the string: This is a rhcsa
Antwort:
Begründung:
Explanation/Reference:
Solution:
su - natasha
vim .bashrc
alias rhcsa='ehco This is a rhcsa'
source .bashrc
rhcsa
70. Frage
......
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EX200 Fragen Und Antworten: https://de.fast2test.com/EX200-premium-file.html
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