Vigyanlabs Interview Questions and Answers

To troubleshoot a server that booted up with the old kernel after a new kernel update, check the bootloader configuration, verify the kernel installation, and review the update process.

• Check the bootloader configuration to ensure it is pointing to the correct kernel version.

• Verify the kernel installation to see if the new kernel was successfully installed.

• Review the update process to identify any errors or issues that may have occurred during the update.

• Check the logs for any...read more

To add a new disk to the system using LVM, you need to initialize the disk, create a physical volume, extend the volume group, and finally extend the logical volume.

• Initialize the disk using fdisk or parted command

• Create a physical volume using pvcreate command

• Extend the volume group using vgextend command

• Extend the logical volume using lvextend command

• Resize the filesystem using resize2fs or xfs_growfs command

Various commands to check CPU and Memory utilization in Linux server.

• To check CPU utilization: top, mpstat, sar

• To check Memory utilization: free, vmstat, sar -r

To check memory space, use 'free' or 'top' command. LVM is Logical Volume Manager for managing disk space. Crontab is a tool for scheduling tasks. Swap memory is virtual memory used when physical memory is full.

• Check memory space using 'free' command to see total, used, and free memory

• LVM is a tool for managing disk space by creating logical volumes from physical volumes

• Crontab is a file used to schedule tasks to run at specific times

• To extend LVM, use 'lvextend' command to i...read more

NAS (Network Attached Storage) is a type of storage device that is connected to a network and provides data storage and access to multiple clients.

• NAS devices are dedicated file storage devices that operate over a network.

• NAS devices can be accessed by multiple users or clients simultaneously.

• NAS devices often have their own operating system and management interface.

• Examples of NAS devices include Synology DiskStation, QNAP NAS, and Western Digital My Cloud.