2.4 Linux Command Line Tutorial
Introduction to Linux
Linux is a family of related operating systems. Linux is powerful, flexible, and free, and it supports many file systems. However, it has a steep learning curve.
Linux is a VFS: everything in Linux is a file. In other words, everything in the system, from processes to directories to sockets, is represented by a file descriptor, or inode, which is how the operating system recognizes files. Even devices are represented by file-like objects, and they can be found under /dev.
An inode is the unique number or ID of a file and the data structure of a file. Users store data in files, and the operating system stores metadata about the file in an inode. The inode points to the content of a file and can be accessed by the file name.
We can view the inodes of files using ls -ia command. The -i option prints the inode.
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Navigating Linux
Printing Information
The present working directory is the directory we are current in. We can view the present working directory with pwd:
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We can use the ls command to list the files and directories that exist in a directory.
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By adding the `` flag, we can TODO.
The tree command TODO.
Paths
Linux commands are also files. For example, the ls command is stored at /bin/ls. However, we can execute ls in any folder. This is because of paths.
A path is a hierarchical representation of the location, or address, of a file or directory within the file system's structure. TODO.
Managing Folders and Files
Searching for Information
Networking
Scripting and Software
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