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| Section | Objectives |
|---|---|
| Topic 1: Create simple shell scripts | - Process script inputs - Process output of shell commands within a script - Use looping constructs to process files and command-line input - Conditionally execute code |
| Topic 2: Manage basic networking | - Restrict network access using firewalld and firewall-cmd - Configure hostname resolution - Configure IPv4 and IPv6 addresses - Configure network services to start automatically at boot |
| Topic 3: Operate running systems | - Manage tuning profiles - Boot systems into different targets manually - Identify CPU and memory intensive processes and kill processes - Adjust process scheduling - Start, stop, and check the status of network services - Securely transfer files between systems - Locate and interpret system log files and journals - Interrupt the boot process to gain access to a system - Preserve system journals - Boot, reboot, and shut down a system normally |
| Topic 4: Configure local storage | - Assign physical volumes to volume groups - Create and remove physical volumes - Create and delete logical volumes - List, create, and delete partitions on GPT disks - Configure systems to mount file systems at boot by UUID or label - Add new partitions, logical volumes, and swap non-destructively |
| Topic 5: Create and configure file systems | - Mount and unmount network file systems using NFS - Extend existing logical volumes - Diagnose and correct file permission problems - Create, mount, unmount, and use VFAT, ext4, and XFS file systems - Configure autofs |
| Topic 6: Manage software | - Install and remove RPM software packages - Configure access to Flatpak repositories - Install and remove Flatpak software packages - Configure access to RPM repositories |
| Topic 7: Understand and use essential tools | - List, set, and change standard ugo/rwx permissions - Use input-output redirection - Access a shell prompt and issue commands with correct syntax - Access remote systems using SSH - Log in and switch users in multi-user targets - Create, delete, copy, and move files and directories - Create and edit text files - Create hard and soft links - Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2 - Locate, read, and use system documentation - Use grep and regular expressions to analyze text |
| Topic 8: Deploy, configure, and maintain systems | - Install and update software packages - Schedule tasks using at, cron, and systemd timer units - Configure time service clients - Start and stop services and configure services to start automatically at boot - Modify the system bootloader - Configure systems to boot into a specific target automatically |
| Topic 9: Manage security | - Manage SELinux port labels - Configure key-based authentication for SSH - Use Boolean settings to modify SELinux settings - Set enforcing and permissive modes for SELinux - Configure firewall settings using firewall-cmd and firewalld - Restore default file contexts - Manage default file permissions - List and identify SELinux file and process contexts |
| Topic 10: Manage users and groups | - Create, delete, and modify local user accounts - Configure privileged access - Create, delete, and modify local groups and group memberships - Change passwords and adjust password aging for local users |
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NEW QUESTION # 60
Create User Account.
Create the following user, group and group membership:
Adminuser group
User natasha, using adminuser as a sub group
User Harry, also using adminuser as a sub group
User sarah, can not access the SHELL which is interactive in the system, and is not a member of adminuser, natasha,harry,sarah password is redhat.
Answer:
Explanation:
groupadd adminuser
useradd natasha -G adminuser
useradd haryy -G adminuser
useradd sarah -s /sbin/nologin
Passwd user name // to modify password or echo redhat | passwd --stdin user name id natasha // to view user group.
NEW QUESTION # 61
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:
Answer see in the explanation.
Explanation/Reference:
# 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 # 62
Configure AutoFS so that accessing /shares/projects mounts server1:/srv/nfs/projects.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
dnf install -y autofs
mkdir -p /shares
echo "/shares /etc/auto.shares" > > /etc/auto.master
echo "projects -fstype=nfs,rw server1:/srv/nfs/projects" > /etc/auto.shares
systemctl enable --now autofs
ls /shares/projects
Detailed Explanation:
* /etc/auto.master defines the main map.
* /etc/auto.shares defines the indirect mount entry.
* The mount happens on demand when /shares/projects is accessed.
* RHEL 10 file-system documentation includes AutoFS for on-demand mounts. ( Red Hat
Documentation )
NEW QUESTION # 63
20. Set the default UMASK for user-created files
For the user natasha:
* The default permission for newly created files should be r--r--r--
* The default permission for newly created directories should be r-xr-xr-x
Answer:
Explanation:
Solution:
# su - natasha
Write the umask setting into the user's .bashrc file in the home directory:
bash
Copy code
echo 'umask 222' >> .bashrc
source .bashrc
Command explanation:
umask is used to control the default permissions for files and directories created by a user.
In umask:
The first digit is for special permissions and is usually 0 (can be omitted if not needed).
The second digit controls owner permissions.
The third digit controls group permissions.
The fourth digit controls permissions for others.
NEW QUESTION # 64
Configure Your System to Use Default Repositories
The YUM repositories are available at http://content/rhel9.0/x86_64/dvd/BaseOS and http://content/rhel9.0/x86_64/dvd/AppStream. Configure your system to use these locations as the default repositories.
Answer:
Explanation:
Method 1:
# Copy the yum configuration file from node1.
[root@node2 ~]# scp root@node1:/etc/yum.repos.d/rhcsa.repo /etc/yum.repos.d/
Method 2:
[root@node2 ~]# vim /etc/yum.repos.d/rhcsa.repo
[Base]
name=Base
baseurl=http://content/rhel9.0/x86_64/dvd/BaseOS
enabled=1
gpgcheck=no
[App]
name=App
baseurl=http://content/rhel9.0/x86_64/dvd/AppStream
enabled=1
gpgcheck=no
# Verification
[root@node2 ~]# yum repoinfo
[root@node2 ~]# yum -y install ftp
NEW QUESTION # 65
......
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