07 Creating and Reading Files

Creating Files with touch
- touch <filename> creates an empty file.
- Can create multiple files at once by listing filenames.
- Updates timestamps if the file already exists.
Writing to Files with echo and >
- echo "text" > file.txt writes text to a file.
- Overwrites existing content unless >> is used to append.
Viewing File Contents
- cat <filename> displays the full file content.
- less <filename> allows scrolling through content interactively.
- head <filename> and tail <filename> show the first or last lines of a file.
Editing Files with nano
- nano <filename> opens a simple text editor in the terminal.
- Use Ctrl + X to exit, Y to save changes, and N to discard.
Reading and Searching Inside Files
- grep "word" <filename> finds lines containing a specific word.
- grep -i "word" <filename> makes the search case-insensitive.
- grep -r "word" <directory> searches recursively in a directory.