cat
cat is a Linux command in the File Operations category, rated beginner difficulty. Concatenates and displays file contents on the terminal. The syntax is cat [options] file. Key options and parameters: file — file(s) to display. It returns file contents to stdout. A practical example: cat file.txt cat file1.txt file2.txt > combined.txt # Merge files cat -n file.txt # Show with line numbers A close relative is ls, which lists directory contents. One of the most frequently used commands. A close relative is cd, which changes the current working directory. A close relative is pwd, which prints the current working directory path. More about this category: Linux file operation commands — ls, cd, cp, mv, rm, mkdir, touch, and more. Create, delete, copy, and manage files and directories. Related File Operations commands: ls, cd, pwd, mkdir, rmdir, rm, cp, mv.