Ericsson Linux Administrator Interview Questions and Answers

Steps for file system creation involve partitioning, formatting, and mounting the file system.

• Partition the disk using tools like fdisk or parted

• Format the partition with a file system like ext4 or xfs

• Create a mount point directory

• Mount the file system to the mount point

• Update /etc/fstab to automatically mount the file system on boot

tcpdump is used for network troubleshooting and analysis by capturing and analyzing network packets.

• Captures network packets for analysis

• Helps in troubleshooting network issues

• Can be used to monitor network traffic

• Provides detailed information about network communication

• Useful for security analysis and monitoring

Files can be transferred from one server to another using tools like SCP, SFTP, or rsync.

• Use SCP (Secure Copy Protocol) to securely transfer files between servers. Example: scp file.txt user@server2:/path/to/directory

• Use SFTP (SSH File Transfer Protocol) for interactive file transfers. Example: sftp user@server2

• Use rsync for efficient synchronization of files between servers. Example: rsync -avz file.txt user@server2:/...read more

You can schedule a job regularly using cron jobs in Linux.

• Use the crontab command to edit the cron table

• Specify the schedule using the appropriate syntax (minute, hour, day of month, month, day of week)

• For example, to schedule a job to run every day at 3am, you would add the following line to the cron table: 0 3 * * * /path/to/command

Hard links and soft links are two types of links used in Unix-like operating systems to create shortcuts to files.

• Hard links are direct pointers to the inode of a file, while soft links are indirect pointers to the file name.

• Hard links cannot link directories or files on different filesystems, while soft links can.

• If the original file is deleted, hard links will still point to the data, while soft links will be broken.

• ...read more

The /mnt directory is used as a mount point for temporary mounting of filesystems, and fstab is a configuration file that lists filesystems to be mounted at boot.

• The /mnt directory is commonly used for temporarily mounting external storage devices or network shares.

• The fstab file is located at /etc/fstab and contains information about filesystems to be mounted at boot time.

• Entries in fstab include the device to mount, ...read more

Check for any processes or open files using the file system, then force unmount if necessary.

• Check for any processes or applications currently using the file system with 'lsof' command

• Kill any processes that are using the file system if necessary

• Try unmounting the file system again using 'umount -l' to force unmount if needed

NFS stands for Network File System, a distributed file system protocol that allows a user on a client computer to access files over a network.

• NFS allows a user to access files on a remote server as if they were local files.

• It is commonly used in Unix and Linux environments for sharing files and directories.

• NFS uses RPC (Remote Procedure Call) to communicate between the client and server.

• It provides centralized storage ...read more

Boot process is the sequence of steps that occur when a computer system is starting up.

• BIOS/UEFI initialization

• Loading the bootloader

• Loading the kernel

• Init process starts

• Launching user space processes

Check disk visibility and partitioning to ensure proper filesystem expansion in Linux after assigning a disk from VMware.

• Verify if the disk is recognized by the OS using 'lsblk' or 'fdisk -l'.

• Check if the disk is partitioned using 'parted' or 'fdisk'. If not, create a partition.

• Use 'pvcreate' to initialize the disk for LVM if you're using logical volumes.

• If the disk is already partitioned, ensure the filesystem is resi...read more