File Viewing & Editing

Command	Description	Example
cat	Concatenate and display file contents.	cat file.txt → Displays the content of file.txt.
more/less	View file contents one page at a time.	less file.txt → Displays file.txt one page at a time.
nano/vim/emacs	Text editors for file editing.	nano file.txt → Opens file.txt in the Nano editor.
head	Display the beginning of a file.	head -n 5 file.txt → Displays the first 5 lines of file.txt.
tail	Display the end of a file.	tail -n 5 file.txt → Displays the last 5 lines of file.txt.
wc	Count lines, words, and characters in a file.	wc file.txt → Outputs the line, word, and character counts of file.txt.
sed	Stream editor for text manipulation.	sed 's/old/new/g' file.txt → Replaces "old" with "new" in file.txt.