FREE RHCE System Configuration and Management Questions and Answers
What services need to run at boot for NFS (Network File System) to function correctly?
For NFS to operate properly on a Red Hat Enterprise Linux system, the following services need to be started at boot:
*rpcbind: Manages RPC (Remote Procedure Call) connections and is necessary for NFS to communicate over the network.
*nfs: Provides the main NFS server functionality.
*nfslock: Provides file locking for NFS clients, ensuring data integrity and preventing conflicts.
Enabling these services ensures that NFS clients can access and manage files across the network using NFS protocols effectively.
How do you mount an NFS share from the command line?
To mount an NFS share from the command line in Red Hat Enterprise Linux:
*Use the mount command with the -t option specifying nfs.
*Provide the NFS server hostname (server.example.com) followed by the path of the NFS share (/nfs_share).
*Specify the local mount point (/mnt) where the NFS share will be mounted.
This command structure ensures that the NFS share is correctly mounted and accessible at the specified mount point (/mnt). Understanding and correctly using this command is essential for managing NFS mounts in a Linux environment.
How do you mount an NFS share using fstab?
To mount an NFS share using /etc/fstab (File System Table):
*Specify the NFS server hostname (nfsserver) followed by the export path (/exports).
*Specify the local mount point (/mount-point) where the NFS share will be mounted.
*Use the filesystem type nfs.
*Include mount options (defaults in this case).
*Set 0 0 for the dump and fsck order fields.
This entry in /etc/fstab ensures that the NFS share is automatically mounted during system boot or when the mount -a command is executed. Understanding how to correctly configure NFS mounts in /etc/fstab is crucial for system administrators managing NFS-based file systems
How do you add a Samba user?
To add a Samba user using the smbpasswd command:
*Use smbpasswd -a engineer1, where engineer1 is the username to be added.
*This command prompts for a password for the user and adds them to the Samba password database (/etc/samba/smbpasswd).
*It enables the user to authenticate and access Samba shares configured on the system.
Understanding how to manage Samba users is essential for system administrators handling network services.
How do you install the SELinux GUI?
To install the SELinux GUI tools on a Red Hat system:
*Use the command yum install -y policycoreutils-gui.
*This command installs the necessary packages (policycoreutils-gui) that provide graphical tools for managing SELinux policies and configurations.
*The -y flag automatically answers yes to any prompts during the installation process, ensuring a smooth installation.
Understanding how to manage and configure SELinux through graphical tools is essential for system configuration and management tasks.
(SHELL) How do you tell if a file is of a certain type?
In Shell scripting:
*Use the test command with the -f option to check if a file exists and is a regular file.
*The condition [ ! -f /var/cache/man/whatis ] inverts the test (!) to check if /var/cache/man/whatis is not a regular file (-f).
*This is useful for conditional logic in scripts to perform actions based on the type of file or its existence.
Understanding shell scripting fundamentals, including file type checking and conditional expressions, is crucial for system configuration and management tasks.
Which Ansible module is used for creating and editing filesystems?
The mount module in Ansible is used to manage filesystem mounts on target hosts.
It can be used to create, edit, or remove filesystem mounts, making it essential for managing storage configurations in automated environments.