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Top Forums UNIX for Dummies Questions & Answers ConCATenating binaries but excluding last bytes from each file Post 302877663 by Don Cragun on Monday 2nd of December 2013 08:06:42 PM
Old 12-02-2013
Telling us that filenames are something like x-y where x and y are strings of digits isn't enough for us to figure out how to determine which file is file1, file2, ...

Give us details.
  1. How do you know which files are to be combined and in what order?
  2. Are the names of the files just two strings of digits separated by a single minus sign, or are the other characters in the name that need to be skipped over (or used to determine the order in which they're to be concatenated?
  3. How do you determine the output file name (or do you just want the output to be written to stout?
  4. Can we choose which shell we want to use, or have you decided the only one shell should be used? If only one, which one?
 

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cat(1)							      General Commands Manual							    cat(1)

Name
       cat - concatenate and print data

Syntax
       cat [ -b ] [ -e ] [ -n ] [ -s ] [ -t ] [ -u ] [ -v ] file...

Description
       The  command reads each file in sequence and displays it on the standard output.  Therefore, to display the file on the standard output you
       type:
       cat file
       To concatenate two files and place the result on the third you type:
       cat file1 file2 > file3
       To concatenate two files and append them to a third you type:
       cat file1 file2 >> file3
       If no input file is given, or if a minus sign (-) is encountered as an argument, reads from the standard input file.  Output is buffered in
       1024-byte blocks unless the standard output is a terminal, in which case it is line buffered.  The utility supports the processing of 8-bit
       characters.

Options
       -b   Ignores blank lines and precedes each output line with its line number.

       -e   Displays a dollar sign ($) at the end of each output line.

       -n   Precedes all output lines (including blank lines) with line numbers.

       -s   Squeezes adjacent blank lines from output and single spaces output.

       -t   Displays non-printing characters (including tabs) in output.  In addition to those representations used with the -v  option,  all  tab
	    characters are displayed as ^I.

       -u   Unbuffers output.

       -v   Displays  non-printing  characters (excluding tabs and newline) as the ^x.	If the character is in the range octal 0177 to octal 0241,
	    it is displayed as M-x. The delete character (octal 0177) displays as ^?.  For example, is displayed as ^X.

See Also
       cp(1), ex(1), more(1), pr(1), tail(1)

																	    cat(1)
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