Dwithi Technologies Linux introduction
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Kernel: The core of the Linux operating system that interacts with hardware, manages processes, and provides essential system services.
Distribution (Distro): A version of the Linux operating system that includes the Linux kernel, system libraries, and various software packages.
Shell: A command-line interface that allows users to interact with the Linux system by typing commands.
Terminal: The text-based interface through which users interact with the shell.
File System: The structure used to organize and store files and directories on a Linux system, typically based on a hierarchical tree structure.
File Permissions: A set of rules that determine who can read, write, and execute files and directories.
Users and Groups: Linux allows multiple users to access the system, each with their own account, permissions, and settings. Users can belong to one or more groups.
Processes: Running instances of programs or applications, each with its own unique process ID (PID).
Environment Variables: Variables that store information that can be used by shell scripts and programs.
Package Management: Tools and systems used to install, update, and remove software packages on a Linux system, such as APT, YUM, and DNF.
Shell Scripting: Writing scripts in a shell language (like Bash) to automate tasks and execute sequences of commands.
File System Hierarchy: The organization of directories and files in the Linux file system, including directories like /bin, /etc, /home, /var, and more.
Boot Process: The sequence of events that occur when a Linux system starts up, including BIOS/UEFI, bootloader (e.g., GRUB), and initialization.
daemons: Background processes that provide various system services, such as network services, printing, and system monitoring.
Linux File Types: Regular files, directories, symbolic links, devices, sockets, and named pipes (FIFOs).
Virtual File Systems: Special file systems like /proc and /sys that provide access to kernel and system information.
Shells and Shell Features: Different shells available in Linux (e.g., Bash, Zsh) and their features, like piping, redirection, and command substitution.
File Compression: Utilities like gzip and tar used to compress and archive files and directories.
Text Editors: Common text editors in Linux, such as Vim, Nano, and Emacs.
Networking Concepts: TCP/IP, DNS, DHCP, firewalls, and network configuration.
System Logging: Logging of system events, errors, and messages using the syslog system and log files.
Linux File Permissions: The read, write, and execute permissions for user, group, and others on files and directories.
Kernel Modules: Dynamically loadable code that extends the functionality of the Linux kernel.
Cron and At: Tools for scheduling and automating tasks at specific times or intervals.
Remote Access: Secure remote access to Linux systems using SSH (Secure Shell) and tools like OpenSSH.
User and Group Management: Commands and tools for managing users and groups on a Linux system.
Hardware Devices: Concepts related to hardware recognition, drivers, and device management.
RAID (Redundant Array of Independent Disks): Techniques for combining multiple disks for increased performance, redundancy, or both.
File System Encryption: Methods for encrypting data at rest, such as dm-crypt and LUKS.
Security: Concepts related to security, including firewalls, permissions, SELinux, and AppArmor.
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