Looking for accessing and editing multiple files in a directory.

[Sumit jain]

#Looking for logic which can modify multiple files in a #directory.Eg /Sumit/Files/ in this there are 3 file #Sam123.12,Sam437.34,Sam676.81.read file one by one and #need only those line which can match pattern like S[1234 #in a file and delete rest lines in file.

Two things are there:
read multiple files one by one automatically.
modify each file with respect to pattern.

thanks in advance

[ashitpro]

#!/bin/bash
 
directory="/Sumit/Files"
mkdir output_dir
 
for f in `ls -1 $directory`
do
        sed '/S\[1234/d' "$directory/$f" > "output_dir/$f"
done
 

It should create new directory named output_dir in your current directory. It will contain all modified files.

In sed command specify whatever regex/pattern you want to match, whichever line matches that pattern will not be redirected to new file.