Day 2- Basic Linux Commands

Introduction to Linux:

Linux is a free and open-source operating system kernel initially developed by Linus Torvalds in 1991.
It is widely used in various devices, from servers and desktop computers to smartphones and embedded systems.
Linux offers stability, security, and customization, making it a popular choice among tech enthusiasts, developers, and businesses.

Basic Linux Commands:

Check your present working directory:

Use the pwd command to know your current location in the terminal.

Example:
```
 bashCopy code$ pwd
 /home/user/Documents
```

List all files and directories (including hidden files):

Use the ls command to view the contents of the current directory.

Example:

 shellCopy code$ ls
 file1.txt  file2.txt  folder1  folder2

 $ ls -a
 .  ..  .hidden_file  file1.txt  file2.txt  folder1  folder2

Create a nested directory A/B/C/D/E:

Use the mkdir command with the -p option to create nested directories.
1. Example:
```
 cssCopy code$ mkdir -p A/B/C/D/E
```
Change Directory (cd): Use the cd command to navigate to a different directory.

Example:
```
 shellCopy code$ cd /home/user/Documents
```
Remove Directory (rmdir): Use the rmdir command to remove an empty directory.

Example:
```
 shellCopy code$ rmdir empty_directory
```
Remove Files and Directories (rm): Use the rm command with the -r option to remove directories and their contents.

Example:
```
 shellCopy code$ rm file.txt
 $ rm -r folder
```
Copy Multiple Files (cp): Use the cp command to copy multiple files to a destination directory.

Example:
```
 shellCopy code$ cp file1.txt file2.txt /home/user/Documents/
```
Move Multiple Files (mv): Use the mv command to move multiple files to a destination directory.

Example:
```
 shellCopy code$ mv file1.txt file2.txt /home/user/Documents/
```
File Permissions (chmod): Use the chmod command to change file permissions.

Example:
```
 shellCopy code$ chmod +x script.sh
```
Display File Contents (less): Use the less command to view the content of a file page by page.

Example:
```
rubyCopy code$ less large_file.txt
```
File Count (wc): Use the wc command to count the number of lines, words, and characters in a file.

Example:
```
shellCopy code$ wc file.txt
   10    25   200 file.txt
```
Find Files (find): Use the find command to search for files or directories.

Example:
```
arduinoCopy code$ find /home/user -name "file*.txt"
```
Create and Edit Text Files (nano): Use the nano command to create and edit text files in the terminal.

Example:
```
rubyCopy code$ nano new_file.txt
```