cat

Print and concatenate files. More information: https://manned.org/cat.1posix.

• 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}}

src. https://github.com/tldr-pages/tldr/blob/main/pages/common/cat.md