130+ RHCE Interview Questions and Answers [Red Hat Certified Engineer – 2025]

User and Group Management

1. What is the purpose of the /etc/passwd file in RHEL?

The /etc/passwd file stores user account details, including usernames, UIDs, GIDs, home directories, and shells. It enables authentication and user environment setup, ensuring secure access control and proper user mapping in RHEL systems for enterprise administration.

2. Why is the usermod command critical for RHCE tasks?

• Modifies user attributes like UID or groups.
• Updates home directories or shells.
• Ensures secure account management.
  The usermod command allows precise user account adjustments, maintaining security and alignment with organizational policies in RHEL multi-user environments.

3. When should you use the groupadd command?

Use groupadd to create groups for shared resource access during system setup or project collaboration. It assigns GIDs, enabling permission management, ensuring secure and organized access control in RHEL environments for efficient team workflows.

4. Where are group memberships defined in RHEL?

• Defined in /etc/group.
• Lists group names, GIDs, and members.
• Supports access control policies.
  Group memberships organize permissions, ensuring secure resource sharing for collaborative tasks in RHEL systems.

5. Who can manage user accounts in RHEL?

Root or sudo-privileged administrators manage user accounts using commands like useradd or usermod. This ensures controlled account creation and modification, maintaining security and preventing unauthorized access in RHEL enterprise environments.

6. Which command displays group memberships for a user?

• The id command shows user details.
• Lists primary and secondary groups.
• Verifies access permissions.
  It ensures correct group assignments for secure resource access in RHEL systems.

7. How do you lock a user account in RHEL?

Use usermod -L username to lock an account, modifying /etc/shadow to disable login. Unlock with usermod -U. This temporarily restricts access, preserving data for security purposes in RHEL systems during administrative actions.

8. What does the /etc/login.defs file configure?

The /etc/login.defs file sets defaults for user creation, like password aging, UID ranges, and shell preferences. It ensures consistent account policies, streamlining user management and enhancing security in RHEL multi-user environments.

9. Why is centralized user management important?

• Simplifies user administration across systems.
• Enhances security with consistent policies.
• Supports LDAP or SSSD integration.
  Centralized management ensures scalability and compliance in RHEL enterprise environments, reducing administrative overhead.

10. When do you use the chage command?

Use chage to manage password aging, setting expiration or warning periods. It enforces regular password updates, reducing credential risks and ensuring compliance with security policies in RHEL systems for enterprise-grade user management.

11. Where are user-specific configurations stored?

• Stored in /home/username, e.g., .bashrc.
• Customizes shell or application settings.
• Ensures user-specific environments.
  These configurations provide personalized, consistent user experiences in RHEL multi-user systems.

12. Who can modify the /etc/sudoers file?

Root or sudo-privileged users edit /etc/sudoers using visudo for syntax validation. This ensures secure privilege delegation, preventing unauthorized access and maintaining administrative control in RHEL systems.

13. Which command creates a new group?

The groupadd command creates groups, assigning GIDs for shared access. It simplifies permission management, ensuring secure resource allocation for collaborative projects in RHEL enterprise environments, supporting efficient team workflows.

14. How do you add a user to a group?

Use usermod -aG groupname username to add a user to a group. Verify with id. This grants access to shared resources, ensuring secure and efficient collaboration in RHEL multi-user systems.

15. What is the role of the /etc/gshadow file?

• Stores encrypted group passwords.
• Lists group administrators and members.
• Enhances group-level security.
  The /etc/gshadow file secures group access, ensuring only authorized users perform group-related tasks in RHEL.

16. Why is the visudo command preferred for editing /etc/sudoers?

The visudo command validates syntax, preventing errors that could lock out administrators. It ensures secure privilege configuration, maintaining access control and system integrity in RHEL environments during administrative tasks.

17. When should you use the userdel command?

• Removes user accounts.
• Deletes home directories with -r.
• Ensures secure account cleanup.
  Use userdel to remove obsolete accounts, freeing resources in RHEL systems.

18. Where are default user settings applied?

Default user settings are applied from /etc/default/useradd and /etc/login.defs. These files define shell, home directory, and UID policies, ensuring consistent account creation in RHEL multi-user environments.

19. Who can set password policies in RHEL?

Root or sudo-privileged administrators set password policies using chage or /etc/login.defs. This enforces secure password practices, ensuring compliance and protecting user accounts in RHEL enterprise systems.

File and Directory Management

20. What does the chmod command do?

The chmod command modifies file or directory permissions, setting read, write, or execute rights. It ensures secure access control, restricting sensitive files to authorized users, critical for data integrity in RHEL systems.

21. Why is the chown command used?

• Changes file or directory ownership.
• Assigns users or groups.
• Enhances access control.
  The chown command ensures secure resource sharing in collaborative RHEL environments.

22. When should you use the find command?

Use find to locate files by criteria like name or size during maintenance or troubleshooting. It streamlines file management, enabling quick identification for security or cleanup tasks in RHEL systems.

23. Where are temporary files stored?

• Stored in /tmp or /var/tmp.
• Used for transient data.
• Cleared periodically by system.
  Temporary files support short-term operations, ensuring efficient resource use in RHEL.

24. Who can change file permissions?

File owners or root/sudo-privileged users change permissions using chmod. This restricts access to authorized users, ensuring secure file management and preventing unauthorized modifications in RHEL systems.

25. Which command creates a symbolic link?

• The ln -s command creates symlinks.
• Links files or directories.
• Simplifies access without duplication.
  It enhances file management efficiency in RHEL systems.

26. How do you set Access Control Lists (ACLs)?

Use setfacl to set ACLs, granting specific permissions to users or groups. Verify with getfacl. This enables fine-grained access control, ensuring secure collaboration in RHEL environments when standard permissions are insufficient.

27. What is the purpose of the tar command?

The tar command archives files or directories, creating compressed backups. It supports creating, extracting, or listing archives, ensuring efficient data storage and transfer for administrative tasks in RHEL systems.

28. Why is the getfacl command used?

• Displays Access Control Lists.
• Shows granular permissions.
• Verifies complex access settings.
  The getfacl command ensures precise access control in collaborative RHEL environments.

29. When do you use the rsync command?

Use rsync for efficient file synchronization or backups, copying only changed data. It supports remote transfers, ensuring data integrity and minimizing bandwidth usage in RHEL systems for reliable data management.

30. Where are deleted files stored temporarily?

Deleted files may go to /lost+found after filesystem repairs or remain unrecoverable unless backed up. This directory aids data recovery, ensuring minimal loss during filesystem errors in RHEL systems.

31. Who can access the /root directory?

• Only root or sudo-privileged users.
• Contains sensitive configuration files.
• Ensures administrative security.
  Access restrictions protect critical system settings in RHEL environments.

32. Which command displays disk usage by directory?

The du command lists directory sizes in human-readable format. It identifies large directories, aiding storage optimization and cleanup planning in RHEL systems for efficient resource management.

33. How do you compress a directory?

Use tar -czvf archive.tar.gz directory to compress a directory. Verify with tar -tzvf. This creates manageable backups, saving space and enabling efficient data transfer in RHEL systems for administrative tasks.

System Services and Processes

34. What does the systemctl command manage?

• Controls system services.
• Starts, stops, or enables services.
• Configures boot-time behavior.
  The systemctl command ensures service availability, critical for RHEL system reliability.

35. Why is the crontab command used?

The crontab command schedules automated tasks, like backups or updates, at defined intervals. It reduces manual effort, ensuring consistent execution of repetitive tasks, enhancing efficiency in RHEL system administration.

36. When should you restart a service?

• Restart after configuration changes.
• Apply updates or patches.
• Resolve service failures.
  Restarting ensures services reflect new settings, maintaining functionality in RHEL systems.

37. Where are systemd unit files stored?

• Custom units in /etc/systemd/system.
• Defaults in /usr/lib/systemd/system.
• Defines service configurations.
  Unit files manage service settings, ensuring proper operation in RHEL systems.

38. Who can manage system services?

Root or sudo-privileged users manage services using systemctl. This ensures controlled operations, preventing unauthorized changes and maintaining system stability in RHEL enterprise environments.

39. Which command monitors running processes?

• The ps command lists processes.
• Shows PIDs and resource usage.
• Aids performance management.
  It ensures efficient task management in RHEL systems.

40. How do you prioritize a process?

Use nice to set priority for new processes or renice for running ones. This allocates CPU resources effectively, ensuring critical tasks perform optimally in RHEL systems under varying workloads.

41. What is the role of the top command?

• Displays real-time resource usage.
• Shows CPU and memory stats.
• Identifies resource-intensive processes.
  The top command optimizes performance in multi-tasking RHEL environments.

42. Why is the kill command used?

The kill command terminates processes using signals like SIGTERM or SIGKILL. It frees resources from hung processes, restoring system stability without rebooting, critical for efficient RHEL system management.

43. When do you use the lsof command?

• Lists open files by processes.
• Identifies resource conflicts.
• Aids troubleshooting tasks.
  Use lsof to diagnose file or network issues in RHEL systems.

44. Where are systemd journal logs stored?

• Stored in /var/log/journal.
• Contains detailed event data.
• Supports service troubleshooting.
  Journal logs diagnose issues, ensuring reliability in RHEL systems.

45. Who can schedule tasks with crontab?

Users with crontab permissions or root/sudo-privileged administrators schedule tasks. This ensures controlled automation, preventing unauthorized task execution and maintaining system integrity in RHEL environments.

46. Which command checks service status?

The systemctl status command displays service status, including active state and logs. It verifies service functionality, aiding troubleshooting and ensuring reliable operations in RHEL systems for critical applications.

47. How do you enable a service at boot?

Use systemctl enable service to enable a service at boot. Verify with systemctl is-enabled. This ensures automatic startup, maintaining service availability in RHEL systems without manual intervention.

Security and Access Control

48. What is the purpose of the /etc/sudoers file?

The /etc/sudoers file defines user privileges for executing commands with elevated permissions. Edited with visudo, it ensures controlled administrative access, preventing unauthorized actions and maintaining security in RHEL systems.

49. Why is SELinux critical for RHEL security?

• Enforces mandatory access controls.
• Restricts process privileges.
• Mitigates exploit risks.
  SELinux limits unauthorized actions, ensuring processes adhere to policies, enhancing security in RHEL environments.

50. When should you use the semanage command?

Use semanage to manage SELinux policies, like file contexts or ports. It ensures applications comply with security constraints, enabling secure operation in RHEL without disabling SELinux protections.

51. Where are failed login attempts logged?

• Logged in /var/log/secure or /var/log/auth.log.
• Shows user and failure details.
• Detects brute-force attacks.
  Monitoring logs ensures timely security responses in RHEL systems.

52. Who can configure SSH access?

Root or sudo-privileged administrators configure SSH via /etc/ssh/sshd_config. They manage settings like ports or authentication, ensuring secure remote access for authorized users in RHEL environments.

53. Which command lists open network ports?

• The ss command shows open ports.
• Lists TCP/UDP connections.
• Verifies service accessibility.
  It minimizes security risks in RHEL network configurations.

54. How do you enable SELinux enforcing mode?

Edit /etc/selinux/config to set SELINUX=enforcing, apply with setenforce 1, and reboot if needed. This enforces strict policies, enhancing security by preventing unauthorized actions in RHEL systems.

55. What does the restorecon command do?

• Resets SELinux file contexts.
• Ensures policy compliance.
• Prevents service denials.
  The restorecon command corrects contexts, maintaining security in RHEL environments.

56. Why disable root login via SSH?

Disabling root SSH login in /etc/ssh/sshd_config reduces attack risks, forcing standard user logins with sudo. This minimizes damage from compromised credentials, enhancing security in RHEL networked systems.

57. When do you use the auditctl command?

• Configures real-time auditing.
• Monitors critical file changes.
• Ensures security compliance.
  The auditctl command tracks sensitive modifications, maintaining accountability in RHEL systems.

58. Where are SSH configuration files stored?

• Located in /etc/ssh.
• Includes sshd_config for servers.
• Manages client configurations.
  SSH files ensure secure, customized remote access in RHEL systems.

59. Who can view /var/log/audit/audit.log?

Root or permitted users view /var/log/audit/audit.log, containing SELinux audit events. It helps analyze security incidents, ensuring compliance and maintaining system integrity in RHEL environments.

60. Which command tracks user login activity?

• The last command shows login history.
• Displays users and timestamps.
• Detects unauthorized access.
  It provides audit trails for security monitoring in RHEL systems.

61. How do you set password expiration policies?

Use chage to define password aging, like 90-day validity. This enforces regular updates, reducing credential compromise risks, ensuring account security in RHEL systems per organizational policies.

62. What is the role of the /etc/pam.d directory?

• Holds PAM configuration files.
• Defines authentication rules.
• Ensures secure service access.
  The /etc/pam.d directory enforces authentication policies, maintaining security in RHEL systems.

63. Why is the firewalld service critical?

The firewalld service dynamically manages firewall rules using zones, securing networks by allowing essential services while blocking unauthorized access. It protects RHEL systems from threats in production environments.

64. When should you use authconfig?

Use authconfig in older RHEL versions to configure authentication, like LDAP integration. It simplifies centralized user management, ensuring secure authentication for enterprise environments with complex user bases.

Storage and Filesystem Management

65. What is the purpose of the mkfs command?

The mkfs command formats partitions to create filesystems, like ext4 or XFS, preparing storage for data. It enables administrators to configure disks for specific use cases, ensuring compatibility in RHEL systems.

66. Why is Logical Volume Manager (LVM) used?

• Supports dynamic volume resizing.
• Simplifies storage allocation.
• Enhances flexibility.
  LVM allows storage adjustments without downtime, optimizing resources in RHEL environments.

67. When should you use the fsck command?

• Checks filesystem integrity.
• Repairs errors post-crash.
• Runs on unmounted filesystems.
  The fsck command ensures reliable storage, preventing data corruption in RHEL.

68. Where are swap spaces defined?

• Defined in /etc/fstab.
• Lists swap devices or files.
• Provides virtual memory.
  Swap spaces ensure stability during high memory usage in RHEL.

69. Who can create logical volumes in LVM?

Root or sudo-privileged users create logical volumes, ensuring secure storage management. This prevents unauthorized changes, optimizing disk usage in RHEL systems for enterprise-grade solutions.

70. Which command shows disk usage by directory?

• The du command lists sizes.
• Uses human-readable format.
• Identifies large directories.
  The du command optimizes storage and plans cleanup in RHEL systems.

71. How do you extend a logical volume?

Use lvextend to increase volume size, resize the filesystem with resize2fs, and verify with lvs. This expands storage dynamically, supporting growing data needs in RHEL without disruptions.

72. What does the parted command do?

• Manages disk partitions.
• Supports large disk sizes.
• Configures partition tables.
  The parted command enables flexible storage setups in RHEL systems.

73. Why is the mount command important?

The mount command integrates filesystems into the directory tree, enabling data access. It connects devices to mount points, ensuring applications or users access required data in RHEL systems.

74. When do you use the blkid command?

• Displays block device attributes.
• Shows UUIDs and types.
• Aids /etc/fstab setup.
  The blkid command ensures accurate filesystem mounting in RHEL systems.

75. Where are filesystem mount options defined?

• Defined in /etc/fstab.
• Specifies options like noatime.
• Balances performance and functionality.
  Mount options customize storage access in RHEL systems.

76. Who can format disk partitions?

Root or sudo-privileged users format partitions using mkfs, ensuring secure disk preparation. This prevents unauthorized changes, maintaining data integrity in RHEL storage configurations.

77. Which command checks filesystem integrity?

• The fsck command scans filesystems.
• Repairs errors to prevent data loss.
• Ensures storage reliability.
  It maintains integrity in RHEL systems, especially after crashes.

78. How do you create a swap partition?

Create a partition with fdisk, set type to 82, format with mkswap, and enable with swapon. Add to /etc/fstab for persistence, ensuring virtual memory in RHEL systems.

79. What is the role of the /etc/mtab file?

• Lists mounted filesystems.
• Shows devices and options.
• Dynamically updated.
  The /etc/mtab file helps verify active mounts in RHEL systems.

80. Why is the xfs_admin command used?

• Manages XFS filesystem attributes.
• Sets UUIDs or labels.
• Ensures storage compatibility.
  The xfs_admin command optimizes XFS filesystems in RHEL environments.

81. When should you resize a filesystem?

• Resize after volume extension.
• Accommodates growing data needs.
• Uses resize2fs for ext4.
  Resizing optimizes storage without new partitions in RHEL systems.

82. Where are LVM volume group details stored?

• Stored in /etc/lvm.
• Includes lvm.conf for settings.
• Backups in /etc/lvm/backup.
  Volume group details support storage management in RHEL systems.

Networking Configuration

83. What does the /etc/hosts file do?

The /etc/hosts file maps IPs to hostnames for local resolution. It supports fast, DNS-independent communication, essential for small networks or reliable hostname mappings in RHEL systems.

84. Why is the nmcli command used?

• Manages network configurations.
• Sets static IPs or connections.
• Automates network tasks.
  The nmcli command ensures reliable connectivity for RHEL servers, ideal for scripting.

85. When should you restart the networking service?

Restart networking after configuration changes, like IP updates, using nmcli con reload. This applies settings without rebooting, ensuring continuous connectivity for critical services in RHEL production environments.

86. Where are DNS settings configured?

• Configured in /etc/resolv.conf.
• Managed via NetworkManager tools.
• Specifies DNS servers.
  DNS settings ensure reliable name resolution in RHEL systems.

87. Who can configure network interfaces?

Root or sudo-privileged administrators configure interfaces using nmcli or manual edits. This ensures secure network setup, preventing unauthorized changes and maintaining connectivity in RHEL systems.

88. Which command checks network connectivity?

• The ping command tests connectivity.
• Measures latency and packet loss.
• Diagnoses network issues.
  It ensures reliable communication in RHEL systems.

89. How do you set a static IP address?

Edit /etc/sysconfig/network-scripts/ifcfg-<interface>, set BOOTPROTO=none, specify IPADDR, NETMASK, and GATEWAY. Restart with nmcli con reload. This ensures stable connectivity for RHEL servers, supporting critical applications.

90. What is the purpose of the /etc/resolv.conf file?

The /etc/resolv.conf file lists DNS servers for name resolution. Managed by NetworkManager, it ensures applications resolve hostnames reliably, critical for network-dependent services in RHEL systems.

91. Why is the firewall-cmd command used?

• Manages firewalld rules.
• Opens or closes ports.
• Ensures secure network access.
  The firewall-cmd command supports dynamic changes in RHEL production environments.

92. When do you use the ip command?

Use the ip command to manage network interfaces, routes, or addresses. It replaces older tools like ifconfig, providing advanced control for configuring and troubleshooting networks in RHEL systems.

93. Where are network interface configurations stored?

• Stored in /etc/sysconfig/network-scripts.
• Files like ifcfg-eth0 define settings.
• Managed by NetworkManager.
  These configurations ensure consistent network behavior in RHEL systems.

94. Who can manage firewall rules?

Root or sudo-privileged administrators manage firewall rules using firewall-cmd. This ensures secure traffic control, protecting RHEL systems from unauthorized access in networked environments.

95. Which command monitors network traffic?

• The iftop command shows bandwidth usage.
• Identifies high-traffic processes.
• Optimizes network performance.
  It ensures reliable communication in RHEL systems.

96. How do you configure a network bond?

Use nmcli to create a bond, set mode (e.g., active-backup), assign IPs, and restart networking. This ensures high availability and performance for critical network services in RHEL systems.

97. What is the role of the Red Hat Network (RHN)?

The Red Hat Network provides software updates, patches, and security advisories. It enables centralized management of RHEL systems, ensuring timely updates and compliance with security standards in enterprise environments.

Troubleshooting and Performance Tuning

98. What does the dmesg command display?

The dmesg command shows kernel ring buffer messages, like hardware errors. It diagnoses boot or system issues, providing insights for quick resolution in RHEL environments, ensuring system stability.

99. Why is the top command used?

• Shows real-time resource usage.
• Identifies CPU-intensive processes.
• Optimizes system performance.
  The top command ensures efficient operation in multi-tasking RHEL systems.

100. When should you use the journalctl command?

Use journalctl to analyze systemd logs during troubleshooting. It identifies service failures, ensuring quick resolution and system reliability in RHEL with detailed event data.

101. Where are kernel panic logs stored?

• Stored in /var/log/messages or /var/log/syslog.
• Contains crash details.
• Aids failure diagnosis.
  Kernel panic logs identify hardware or kernel issues in RHEL.

102. Who can modify kernel parameters at runtime?

Root or sudo-privileged users use sysctl to tune kernel parameters, optimizing performance dynamically. This enables features without rebooting, critical for RHEL production systems.

103. Which command checks system uptime?

• The uptime command shows runtime.
• Displays days since reboot.
• Verifies system stability.
  It aids maintenance planning in RHEL systems.

104. How do you troubleshoot a service failure?

Check status with systemctl status, view logs with journalctl, and restart if needed. This identifies errors, restoring functionality quickly in RHEL environments for reliable operations.

105. What does the strace command do?

• Traces process system calls.
• Diagnoses application failures.
• Identifies performance bottlenecks.
  The strace command debugs errors, optimizing applications in RHEL systems.

106. Why is the sar command used?

The sar command collects performance data, like CPU or disk usage, analyzing trends. It optimizes resources, ensuring efficient operation in RHEL systems under varying workloads, critical for performance tuning.

107. When do you use the tcpdump command?

• Captures network packets.
• Analyzes traffic flow.
• Detects suspicious activity.
  The tcpdump command troubleshoots network issues, ensuring reliable connectivity in RHEL.

108. Where are core dump files stored?

• Stored in /var/lib/systemd/coredump.
• Configured via /proc/sys/kernel/core_pattern.
• Aids application crash debugging.
  Core dumps diagnose crashes in RHEL systems.

109. Who can use performance tuning tools like tuned?

Root or sudo-privileged users use tuned to optimize workload-specific settings. This enhances system efficiency, ensuring performance for RHEL servers or applications in demanding environments.

110. Which command monitors memory usage?

• The free command shows memory details.
• Displays total and used amounts.
• Optimizes resource allocation.
  It ensures efficient performance in RHEL systems.

111. How do you analyze disk performance with fio?

Install fio, run tests with parameters like block size, and review IOPS or latency results. This optimizes storage for specific workloads, ensuring efficient performance in RHEL systems.

112. What is the role of the /proc filesystem?

The /proc filesystem provides runtime system information, like /proc/cpuinfo for CPU details. It supports monitoring and troubleshooting, enhancing diagnostics in RHEL without additional tools.

113. Why is the iotop command useful?

• Monitors disk I/O by process.
• Identifies performance bottlenecks.
• Ensures efficient storage.
  The iotop command optimizes disk performance in RHEL for heavy workloads.

114. When do you use the netstat command?

Use netstat in older RHEL versions to list network connections and ports. It troubleshoots connectivity issues, ensuring reliable network operations in legacy environments.

115. Where are systemd journal logs stored?

• Stored in /var/log/journal.
• Provides detailed event data.
• Aids service troubleshooting.
  Journal logs diagnose issues, ensuring reliability in RHEL systems.

116. Who can change the system hostname?

Root or sudo-privileged users use hostnamectl to change the hostname, ensuring consistent system identification across networks, critical for server management in RHEL environments.

117. Which command displays CPU details?

• The lscpu command shows CPU architecture.
• Displays cores and capabilities.
• Aids performance optimization.
  It ensures efficient CPU usage in RHEL systems.

Advanced System Administration

118. What is the purpose of the tuned service?

The tuned service optimizes system performance by adjusting settings like CPU or disk parameters based on workload profiles. It enhances efficiency, ensuring RHEL systems meet specific performance requirements in enterprise environments.

119. Why is the ansible tool used in RHCE tasks?

• Automates configuration management.
• Streamlines system administration tasks.
• Ensures consistent deployments.
  The ansible tool simplifies large-scale RHEL system management, enhancing efficiency and reliability.

120. When should you use the puppet tool?

Use puppet for automating system configuration and management in large RHEL environments. It ensures consistent settings across servers, reducing manual effort and maintaining compliance with organizational policies.

121. Where are kernel modules stored?

• Stored in /lib/modules/<kernel-version>.
• Supports hardware or filesystems.
• Enables new features.
  Kernel modules ensure compatibility and functionality in RHEL systems.

122. Who can update the system kernel?

Root or sudo-privileged users update the kernel with dnf, applying patches and features. A reboot ensures updates take effect, maintaining reliability in RHEL enterprise environments.

123. Which command loads a kernel module?

• The modprobe command loads modules.
• Resolves module dependencies.
• Enhances system functionality.
  It enables dynamic feature addition in RHEL systems.

124. How do you configure a Red Hat cluster?

Use pcs to set up nodes, resources, and fencing. Configure /etc/corosync/corosync.conf for communication. This ensures high availability, supporting critical services in RHEL enterprise environments with minimal downtime.

125. What is the role of the subscription-manager?

The subscription-manager registers RHEL systems with Red Hat for updates and support. It manages subscriptions, ensuring access to repositories, patches, and security advisories, critical for compliance in enterprise environments.

126. Why is the cockpit tool used?

• Provides web-based system management.
• Monitors performance and services.
• Simplifies administrative tasks.
  The cockpit tool enhances RHEL system administration with an intuitive interface.

127. When do you use the sosreport command?

Use sosreport to collect system diagnostics for troubleshooting. It gathers logs, configurations, and performance data, aiding support teams in diagnosing issues, ensuring quick resolution in RHEL environments.

128. Where are Red Hat subscription details stored?

• Stored in /etc/rhsm/rhsm.conf.
• Includes subscription server details.
• Manages repository access.
  Subscription details ensure update availability in RHEL systems.

129. Who can configure high-availability clusters?

Root or sudo-privileged administrators configure clusters using pcs. This ensures secure setup of high-availability services, maintaining uptime and reliability for critical applications in RHEL enterprise environments.

130. Which command manages software packages?

• The dnf command installs/updates packages.
• Resolves dependencies automatically.
• Ensures system updates.
  It maintains security and functionality in RHEL systems.

131. How do you back up a RHEL system?

Use rsync for file backups, tar for archives, or tools like rear for system recovery. Schedule with cron for automation. This ensures data protection and quick restoration in RHEL environments.