cat - Concatenates or displays files
cat [-benrstuv] file...|-
command reads each specified file in sequence
and writes it to standard output.
Interfaces documented on this reference page conform to industry standards as follows:
cat: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
[Compaq] Omits line numbers from blank lines when
is specified. If you specify the
option is automatically invoked with it.
[Compaq] Same as the
option with a
(dollar sign) character displayed at the end of each line.
[Compaq] Displays output lines preceded by line numbers,
numbered sequentially from 1.
[Compaq] Replaces multiple consecutive empty lines with one
empty line, so that there is never more than one empty line between lines
[Compaq] Does not display a message if
cannot find an input file. (Silent option.)
[Compaq] Same as the
option, with the
tab character printed as
Does not buffer output. Writes bytes from the input file to
standard output without delay as each is read.
[Compaq] Displays nonprinting characters so that they are
The name of the file to be displayed.
command is frequently used with
symbol) to concatenate the specified files and write them to the specified
command is also used with
to append a file
to another file.
Do not redirect output to one of the input files using the
(redirection symbol). If you do this, you lose the original data
in the input file because the shell truncates it before
can read it. (See also the
The following exit values are returned:
An error occurred.
To display the file notes, enter: cat notes
The following environment variables affect the execution of
Provides a default value for the internationalization variables
that are unset or null. If
is unset or null, the corresponding value from the default locale is used.
If any of the internationalization variables contain an invalid setting, the
utility behaves as if none of the variables had been defined.
If set to a non-empty string value, overrides the values of
all the other internationalization variables.
Determines the locale for the interpretation of sequences
of bytes of text data as characters (for example, single-byte as opposed to
multibyte characters in arguments).
Determines the locale for the format and contents of diagnostic
messages written to standard error.
Determines the location of message catalogues for the processing
Commands: more(1), ksh(1), pack(1), pg(1), pr(1), Bourne shell sh(1b), POSIX shell sh(1p)