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File: coreutils.info, Node: cat invocation, Next: tac invocation, Up: Output of entire files
3.1 `cat': Concatenate and write files
======================================
`cat' copies each FILE (`-' means standard input), or standard input if
none are given, to standard output. Synopsis:
cat [OPTION] [FILE]...
The program accepts the following options. Also see *Note Common
options::.
`-A'
`--show-all'
Equivalent to `-vET'.
`-B'
`--binary'
On MS-DOS and MS-Windows only, read and write the files in binary
mode. By default, `cat' on MS-DOS/MS-Windows uses binary mode
only when standard output is redirected to a file or a pipe; this
option overrides that. Binary file I/O is used so that the files
retain their format (Unix text as opposed to DOS text and binary),
because `cat' is frequently used as a file-copying program. Some
options (see below) cause `cat' to read and write files in text
mode because in those cases the original file contents aren't
important (e.g., when lines are numbered by `cat', or when line
endings should be marked). This is so these options work as
DOS/Windows users would expect; for example, DOS-style text files
have their lines end with the CR-LF pair of characters, which
won't be processed as an empty line by `-b' unless the file is
read in text mode.
`-b'
`--number-nonblank'
Number all nonblank output lines, starting with 1. On MS-DOS and
MS-Windows, this option causes `cat' to read and write files in
text mode.
`-e'
Equivalent to `-vE'.
`-E'
`--show-ends'
Display a `$' after the end of each line. On MS-DOS and
MS-Windows, this option causes `cat' to read and write files in
text mode.
`-n'
`--number'
Number all output lines, starting with 1. On MS-DOS and
MS-Windows, this option causes `cat' to read and write files in
text mode.
`-s'
`--squeeze-blank'
Replace multiple adjacent blank lines with a single blank line. On
MS-DOS and MS-Windows, this option causes `cat' to read and write
files in text mode.
`-t'
Equivalent to `-vT'.
`-T'
`--show-tabs'
Display TAB characters as `^I'.
`-u'
Ignored; for Unix compatibility.
`-v'
`--show-nonprinting'
Display control characters except for LFD and TAB using `^'
notation and precede characters that have the high bit set with
`M-'. On MS-DOS and MS-Windows, this option causes `cat' to read
files and standard input in DOS binary mode, so the CR characters
at the end of each line are also visible.
An exit status of zero indicates success, and a nonzero value
indicates failure.
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
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