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Top Forums Shell Programming and Scripting Append Multiple files with file name in the beginning of line Post 302880332 by Don Cragun on Thursday 19th of December 2013 01:13:34 AM
Old 12-19-2013
Quote:
Originally Posted by ctsgnb
... ... ...
Code:
grep . {a,b}.txt >c.txt

... ... ...
Note that if an input file contains any empty lines (i.e., just a <newline> character), they will not appear in the output produced by the above command.

However, the command:
Code:
grep '^' *.txt > output

should do what was requested. (Note that if the input files are matched by the pattern *.txt, the output file must not also match that pattern unless it is located in a different directory so the input file pattern won't match the output file's pathname.
This User Gave Thanks to Don Cragun For This Post:
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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