I have created these files in a particular directory
a_1.txt
a_2.txt
...
..
a_n.txt

Each file has a single line.

I want to write a output file a.txt, which will have concantated value of string from all the files.

which utility should i use. copy, cat or paste????

Can anyone help me for this shell script for this.
thanks a ton in advance.
reagrds
vin

can i use
paste

As i found the final output will have all string in appended form.

But , I want to concantate the string which is in stone alone file into a single string.

can you post an example of what you want to have in result?

i have file like :
file_1.txt
file_2.txt
file_3.txt
...
...
file_n.txt

and each file have one string (similar nature)
File_1.txt
111
file_2.txt
222
file_3.txt
333
....
file_n.txt
nnn


following the above example
I want a output file as file.txt and string inthe file should be
11122233334444....nnn

How to do this through script...ie first checking into folder ie how many files subfile exist and then merge a master file out of child file.

thanks a ton in advance
anand

but why not

$ cat file_*.txt | tr -d '\n' > file.txt

this will give 11122233334444....nnn