Explain Boot process?firewalls,user management, partition,fields of /etc/passwd file....

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Accepted Answer

The boot process is the sequence of events that occur when a computer system is powered on or restarted.

The boot process starts with the power-on self-test (POST) where the hardware components are checked.
The system firmware (BIOS or UEFI) is then loaded and initializes the hardware.
The bootloader is executed, which locates and loads the operating system kernel.
The kernel initializes the essential components, mounts the root file system, and starts the init process.
The init process then initializes the rest of the system, starts services, and launches the login prompt.
Firewalls are software or hardware-based security systems that control incoming and outgoing network traffic.
User management involves creating, modifying, and deleting user accounts and managing their permissions.
Partitions divide a storage device into separate sections, allowing different file systems or operating systems to be installed.
The /etc/passwd file stores essential information about user accounts, such as usernames, user IDs, home directories, and login shells.

Accepted Answer

I have explain whole booting process and some other question like user management, firewall, partition, etc

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