Atos Linux Administrator Interview Questions and Answers

NFS can be configured by setting up the NFS server, exporting directories, and configuring client access.

• Install NFS server package on the server

• Edit /etc/exports file to specify directories to be shared

• Restart NFS service to apply changes

• Configure client access by mounting NFS shares on client machines

Patching involves applying updates to software to fix vulnerabilities and improve performance.

• Identify the software that needs to be patched

• Download the necessary patches from the vendor's website

• Test the patches in a non-production environment before applying them to production systems

• Schedule a maintenance window to apply the patches

• Apply the patches using tools like yum, apt-get, or Windows Update

• Verify that the pat...read more

ACL stands for Access Control List, a set of permissions attached to an object that specifies which users or system processes are granted access to that object.

• ACLs are used to control access to files, directories, and other resources on a system.

• They define who can read, write, or execute a file or directory.

• ACLs can be set on a per-user or per-group basis, allowing for more granular control over access permissions.

• Ex...read more

LVM (Logical Volume Manager) is a tool used in Linux to manage storage by creating logical volumes from physical volumes.

• LVM allows for dynamic resizing of logical volumes without downtime.

• It provides features like snapshots, striping, mirroring, and thin provisioning.

• Physical volumes are divided into extents, which can be allocated to logical volumes.

• Commands like pvcreate, vgcreate, lvcreate are used to create physic...read more

File system integrity can be checked using fsck command in Linux.

• Use fsck command to check and repair file system errors

• Run fsck on unmounted file systems for accurate results

• Use options like -y to automatically repair errors without user intervention

To check Kernel and OS Version, change file permissions, view default permissions of files, locate user id and password file, find network configuration file, and filter keywords.

• To check Kernel and OS Version: Use 'uname -a' command

• To change file permissions: Use 'chmod' command followed by permission code and file name

• Default permissions of few files: For example, /etc/passwd has 644 permissions

• User id and password s...read more

LVM is Logical Volume Manager used for managing disk space, RAID is Redundant Array of Independent Disks for data protection, RHEL boot process involves BIOS, GRUB, kernel loading, and init process.

• LVM allows for dynamic resizing of logical volumes without downtime.

• RAID combines multiple disks for data redundancy or performance improvement.

• RHEL boot process involves BIOS POST, GRUB bootloader, kernel loading, and init ...read more

Use 'lsblk' command to scan for new hard drives attached to the system.

• Open terminal and type 'lsblk' command

• Check for any new devices listed in the output

• Alternatively, use 'fdisk -l' command to list all disks and partitions

To roll back updates, identify the update and use the appropriate command to remove it.

• Identify the update that needs to be rolled back

• Use the appropriate command to remove the update

• Verify that the rollback was successful