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cat — Print and concatenate files. More information: <https://keith.github.io/xcode-man-pages/cat.1.html>.

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Problem

How to use the cat command: Print and concatenate files. More information: <https://keith.github.io/xcode-man-pages/cat.1.html>.

Solution

cat — Print and concatenate files. More information: <https://keith.github.io/xcode-man-pages/cat.1.html>.

Print the contents of a file to stdout:
cat {{path/to/file}}


Concatenate several files into an output file:
cat {{path/to/file1 path/to/file2 ...}} > {{path/to/output_file}}


Append several files to an output file:
cat {{path/to/file1 path/to/file2 ...}} >> {{path/to/output_file}}


Copy the contents of a file into an output file without buffering:
cat -u {{/dev/tty12}} > {{/dev/tty13}}


Write stdin to a file:
cat - > {{path/to/file}}


Number all output lines:
cat -n {{path/to/file}}


Display non-printable and whitespace characters (with M- prefix if non-ASCII):
cat -v -t -e {{path/to/file}}

Code Snippets

Print the contents of a file to `stdout`

cat {{path/to/file}}

Concatenate several files into an output file

cat {{path/to/file1 path/to/file2 ...}} > {{path/to/output_file}}

Append several files to an output file

cat {{path/to/file1 path/to/file2 ...}} >> {{path/to/output_file}}

Copy the contents of a file into an output file without buffering

cat -u {{/dev/tty12}} > {{/dev/tty13}}

Write `stdin` to a file

cat - > {{path/to/file}}

Context

tldr-pages: osx/cat

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