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| Section | Objectives |
|---|---|
| Manage users and groups | - Password and password aging management - Local user account management - Privileged access configuration - Local group management |
| Understand and use essential tools | - Users and multi-user targets - Remote system access using SSH - Hard and soft links - Shell access and command syntax - File permissions - Input and output redirection - Text analysis with grep and regular expressions - File archiving and compression - System documentation - File and directory management - Creating and editing text files |
| Manage software | - Install and remove Flatpak packages - Install and remove RPM packages - Configure RPM repositories - Configure Flatpak repositories |
| Manage security | - Firewall configuration - SELinux port labels - SELinux file context restoration - SELinux Boolean settings - SSH key-based authentication - Default file permissions - SELinux file and process contexts - SELinux enforcing and permissive modes |
| Create simple shell scripts | - Processing command output - Looping constructs - Processing script inputs - Conditional execution |
| Configure local storage | - Volume groups - Logical volumes - Adding partitions, logical volumes, and swap - Physical volumes - File system mounting using UUID or labels - GPT disk partitions |
| Create and configure file systems | - Autofs - Extending logical volumes - File permission troubleshooting - VFAT, ext4, and XFS file systems - NFS file systems |
| Operate running systems | - System logs and journals - Process scheduling - Boot systems into different targets - Process monitoring and termination - Interrupt the boot process - Tuning profiles - Boot, reboot, and shut down systems - Secure file transfer - Network services |
| Deploy, configure, and maintain systems | - Time service clients - Bootloader configuration - Task scheduling with at, cron, and systemd timers - Software installation and updates - Service management - Default boot target configuration |
| Manage basic networking | - Hostname resolution - Network services at boot - Firewall configuration with firewalld and firewall-cmd - IPv4 and IPv6 configuration |
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NEW QUESTION # 37
The system ldap.example.com provides an LDAP authentication service.
Your system should bind to this service as follows:
The base DN for the authentication service is dc=domain11, dc=example, dc=com LDAP is used to provide both account information and authentication information. The connection should be encrypted using the certificate at http://host.domain11.example.com/pub/domain11.crt When properly configured, ldapuserX should be able to log into your system, but will not have a home directory until you have completed the autofs requirement. Username: ldapuser11 Password: password
Answer:
Explanation:
system-config-authentication LDAP user DN=dc=domain11,dc=example,dc=com Server= host.domain11.example.com Certificate= http://host.domain11.example.com/pub/domain11.crt (enter url carefully, there maybe // or ..) LDAP password OK starting sssd su -ldapuser11 Display Bash prompt #exit
NEW QUESTION # 38
Configure SELinux so that /webdata can be used as web content and make the context persistent.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
mkdir -p /webdata
semanage fcontext -a -t httpd_sys_content_t "/webdata(/.*)?"
restorecon -Rv /webdata
ls -Zd /webdata
Detailed Explanation:
* semanage fcontext defines a persistent SELinux file-context rule.
* restorecon applies the correct labels to the directory and contents.
* httpd_sys_content_t is the standard read-only content type for Apache.
* RHEL 10 SELinux documentation covers persistent labeling with semanage and applying labels with
restorecon. ( Red Hat Documentation )
NEW QUESTION # 39
There is a local logical volumes in your system, named with common and belong to VGSRV volume group, mount to the /common directory. The definition of size is 128 MB.
Requirement:
Extend the logical volume to 190 MB without any loss of data. The size is allowed between 160-160 MB after extending.
Answer:
Explanation:
see explanation below.
Explanation
lvextend -L 190M /dev/mapper/vgsrv-common resize2fs /dev/mapper/vgsrv-common
NEW QUESTION # 40
Part 2 (on Node2 Server)
Task 5 [Managing Logical Volumes]
Add an additional swap partition of 656 MiB to your system. The swap partition should automatically mount when your system boots Do not remove or otherwise alter any existing swap partition on your system
Answer:
Explanation:
* [root@node2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vdc 252:32 0 5G 0 disk
└─vdc1 252:33 0 4.1G 0 part
└─datavg-datalv 253:3 0 3.9G 0 lvm /data
vdd 252:48 0 5G 0 disk
vde 252:64 0 10G 0 disk
[root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1548 -2
[root@node2 ~]# free -m
total used free shared buff/cache available
Mem: 1816 1078 104 13 633 573
Swap: 2047 1 2046
[root@node2 ~]# parted /dev/vdc print
Number Start End Size Type File system Flags
1 1049kB 4404MB 4403MB primary lvm
* [root@node2 ~]# parted /dev/vdc mkpart primary linux-swap 4404MiB 5060MiB
[root@node2 ~]# mkswap /dev/vdc2
Setting up swapspace version 1, size = 656 MiB (687861760 bytes)
no label, UUID=9faf818f-f070-4416-82b2-21a41988a9a7
[root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1804 -2
[root@node2 ~]# swapon /dev/vdc2
* [root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1804 -2
/dev/vdc2 partition 671740 0 -3
[root@node2 ~]# blkid
/dev/vdc2: UUID="9faf818f-f070-4416-82b2-21a41988a9a7" TYPE="swap" PARTUUID="0f22a35f-02"
[root@node2 ~]# vim /etc/fstab
UUID=9faf818f-f070-4416-82b2-21a41988a9a7 swap swap defaults 0 0
[root@node2 ~]# reboot
[root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1804 -2
/dev/vdc2 partition 671740 0 -3
NEW QUESTION # 41
Binding to an external validation server.
System server.domain11.example.com provides a LDAP validation service, your system should bind to this service as required:
Base DN of validation service is dc=example,dc=com
LDAP is used for providing account information and validation information Connecting and using the certification of http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to encrypt After the correct configuration, ldapuser1 can log into your system, it does not have HOME directory until you finish autofs questions, ldapuser1 password is password.
Answer:
Explanation:
yum -y install sssd authconfig-gtk krb5-workstation authconfig-gtk // open the graphical interface Modify user account database to ldap, fill up DN and LDAP SERVER as questions required, use TLS to encrypt connections making tick, write http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to download ca, authentication method choose ldap password.
You can test if the ldapuser is added by the following command:
Id ldapuser1
Note: user password doesn't not need to set
NEW QUESTION # 42
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