Hi,
I am new to unix and looking out for some help in reading a file contents and replacing the characters, the requirement is I having a folder and having nearly 300 txt files, all the file contents contains some words we need to iterate all each and every files and need to find and replace it with another character.
for example I am having a folder in a defined path

/home/abc/total_files - inside the folder I am having nearly 300 txt files
like one.txt,two.txt etc.., all the text files having word called "DW" (like one.txt is having words like "DW" and two.txt is having "DW") I need write a script while read each and every file and read the contents of the file and need to find the character "DW" and change into "DW2".

Thanks in advance
Kumar

Could look like

you@box:/home/abc/total_files> for file in `ls -1 *.txt`; do sed 's/DW/DW2/g' ${file} > ${file}.bak; mv ${file}.bak ${file}; done