cat copies each file in sequence to the standard output. If no file is given, or if the file
is -, cat copies from standard input starting at the current location.
Number lines as with -n but omit line numbers from blank lines.
-d, --dos-input
Input files are opened in textmode which removes carriage returns in front
of new-lines on some systems.
-e
Equivalent to -vE.
-n, --number
Causes a line number to be inserted at the beginning of each line.
-s
Equivalent to -S for att universe and -B otherwise.
-t
Equivalent to -vT.
-u, --unbuffer
The output is not delayed by buffering.
-v, --show-nonprinting|print-chars
Print characters as follows: space and printable characters as
themselves; control characters as ^ followed by a letter of the alphabet; and characters with the high bit set
as the lower 7 bit character prefixed by M^ for 7 bit non-printable characters and M- for all other
characters. If the 7 bit character encoding is not ASCII then the characters are converted to ASCII to determine high
bit set, and if set it is cleared and converted back to the native encoding. Multibyte characters in the current
locale are treated as printable characters.
-A, --show-all
Equivalent to -vET.
-B, --squeeze-blank
Multiple adjacent new-line characters are replace by one new-line.
-D, --dos-output
Output files are opened in textmode which inserts carriage returns in
front of new-lines on some systems.
-E, --show-ends
Causes a $ to be inserted before each new-line.
-R, --regress
Regression test defaults: -v buffer size 4.
-S, --silent
cat is silent about non-existent files.
-T, --show-blank
Causes tabs to be copied as ^I and formfeeds as ^L.