Ericsson Linux Administrator Interview Questions and Answers

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:/path/to/directory

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

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.

• Example: 'ln file1 file2' creates a hard link, 'ln -s file...read more

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

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 that can be accessed by multiple clients over a network.

• NF...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, the mount point, filesystem type, mount options, and dump ...read more

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