Indian Crafts Linux Administrator Interview Questions, Process, and Tips for Experienced

pfSense is an open-source firewall and router distribution based on FreeBSD. Postfix is a mail transfer agent (MTA) used for sending and receiving emails.

• pfSense is a powerful, feature-rich firewall and router platform

• It provides advanced security features such as VPN, traffic shaping, and intrusion detection

• Postfix is a widely used MTA that routes and delivers email messages

• It is known for its flexibility, scalability...read more

Swap is a space on a hard disk that is used as virtual memory when the physical RAM is full. 'at' is a command to schedule tasks. Yum is a package manager for Linux.

• Swap is a dedicated space on a hard disk used as virtual memory

• It is used when the physical RAM is full

• The 'at' command is used to schedule tasks to be executed at a later time

• Yum is a package manager used in Linux distributions like CentOS and Fedora

NFS server is a network file system server that allows clients to access files over the network as if they were on the local machine.

• NFS stands for Network File System

• It is a distributed file system protocol

• It allows a user on a client computer to access files over a network as if those files were on the local computer

• The NFS server exports one or more directories to the clients

• The clients can mount these directories a...read more

RAID stands for Redundant Array of Independent Disks. RPM stands for Red Hat Package Manager.

• RAID is a data storage technology that combines multiple physical disk drives into a single logical unit for data redundancy, performance improvement, or both.

• There are different RAID levels such as RAID 0, RAID 1, RAID 5, RAID 6, etc.

• RPM is a package management system used in Linux distributions like Red Hat, CentOS, Fedora, e...read more

User management refers to the process of creating, modifying, and deleting user accounts on a computer system.

• User management involves creating, modifying, and deleting user accounts

• It also includes assigning permissions and access levels to users

• User management is important for maintaining security and controlling access to resources

• Examples of user management tools include Active Directory, LDAP, and useradd command

Group management refers to the process of managing user groups in a system.

• Group management involves creating, modifying, and deleting user groups

• It also includes assigning permissions and access levels to groups

• Group management is important for security and access control in a system

• Examples of group management tools include usermod, groupadd, and chgrp

Disk add refers to the process of adding a new disk to a system.

• Disk add involves physically installing the disk and then configuring it to be recognized by the system.

• The new disk can be added as a separate partition or as part of an existing volume group.

• Disk add can be done through command line tools like fdisk or through graphical tools like GParted.

• Adding a disk can increase the storage capacity of a system and im