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Bash Cat

Bash Cat

cat is one of the most frequently used commands in Unix operating systems.

cat is used to read a file sequentially and print it to the standard output. The name is derived from its function to concatenate files.

cat [options] [file_names]

Most used options:

-b, number non-blank output lines
-n, number all output lines
-s, squeeze multiple adjacent blank lines
-v, display non-printing characters, except for tabs and the end of line character

Print in terminal the content of file.txt:

cat file.txt

Concatenate the content of the two files and display the result in terminal:

cat file1.txt file2.txt

Tip: Using cat on a directory will cause error, so make sure it's a readable file.