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Top Forums Shell Programming and Scripting Delete a pattern present in file 2 from file 1 if found in file 1. Post 302602127 by balajesuri on Sunday 26th of February 2012 04:26:19 AM
Old 02-26-2012
Quote:
Originally Posted by machomaddy
Code:
while read line
  do
     sed 's/'$line'//g' File1 > File1_tmp
     mv File1_tmp File1
  done < File2

1. This would only remove that part of string from file1 which matches with file2. It won't remove the whole line from file1.
2. You may do this:
Code:
while read line
do
    grep $line file1 >> file1_tmp
done < file2
mv file1_tmp file1

3. Or you may also do this:
Code:
grep -fv file2 file1

 

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mv(1)							      General Commands Manual							     mv(1)

Name
       mv - move or rename files

Syntax
       mv [-i] [-f] [-] file1 file2

       mv [-i] [-f] [-] file... directory

Description
       The command moves (changes the name of) file1 to file2.

       If  file2  already  exists,  it is removed before file1 is moved.  If file2 has a mode which forbids writing, prints the mode and reads the
       standard input to obtain a line.  If the line begins with y, the move takes place.  If it does not, exits.  For further information, see

       In the second form, one or more files (plain files or directories) are moved to the directory with their original file-names.

       The command refuses to move a file onto itself.

Options
       -		   Interprets all following arguments as file names to allow file names starting with a minus.

       -f		   Force. This option overrides any mode restrictions or the -i switch.

       -i		   Interactive mode.  If a move is to supersede an existing file, the system prompts youw with the name of the	file  fol-
			   lowed  by  a question mark.	If you type a string that begins with y, the move occurs.  If you type any other response,
			   the move does not occur.

Restrictions
       If file1 and file2 lie on different file systems, must copy the file and delete the original.  In this case the owner name becomes that	of
       the copying process and any linking relationship with other files is lost.

See Also
       cp(1), ln(1)

																	     mv(1)
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