File addressing in Linux

In Linux, the file addressing system is a way of specifying the location of a file on the file system. The file system in Linux is structured like a tree, with the root directory at the top of the tree and subdirectories branching out from it. Here is an example of the file system hierarchy:

/
├── bin
├── boot
├── dev
├── etc
├── home
├── lib
├── media
├── mnt
├── opt
├── proc
├── root
├── run
├── sbin
├── snap
├── srv
├── sys
├── tmp
├── usr
└── var

 

To address a file on the file system, you need to specify its path, which is the sequence of directories that leads to the file. There are two types of paths in Linux: absolute paths and relative paths.

An absolute path specifies the full path to a file starting from the root directory. Here is an example of an absolute path:

 

/home/user/file.txt

 

This path specifies a file named file.txt in the user directory, which is inside the home directory, which is at the root of the file system.

A relative path specifies the path to a file relative to the current working directory. Here are some examples of relative paths:

 

./file.txt
../folder/file.txt

 

The first path specifies a file named file.txt in the current working directory, while the second path specifies a file named file.txt in a directory named folder, which is one level up from the current working directory.

Here is a table of common file addressing options in Linux:

OptionDescription

/	Root directory
.	Current directory
..	Parent directory
~	Home directory

And here are some simple examples of how to use these file addressing options:

 

• To navigate to the root directory, use the following command:

cd /

• To navigate to the current directory, use the following command:

cd .

• To navigate to the parent directory, use the following command:

cd ..

• To navigate to the home directory, use the following command:

cd ~

• To navigate to a directory using an absolute path, use the following command:

cd /path/to/directory

• To navigate to a directory using a relative path, use the following command:

cd path/to/directory

 

Note that the file addressing system in Linux is a fundamental concept that is used in many commands and utilities. Understanding how to navigate the file system and address files is essential for working with Linux.