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thanks i tried in another server. now the script is working and the file data is displayed. but the file is not appended with spaces as i said.

Still same error ,

awk: cmd. line:2: fatal: cannot open file `
BEGIN{s=sprintf("%-100s", "")}
NR==1{$0=$0 s}
NR==n{$0=$0 s}
1' for reading (No such file or directory)

Yes.... i replace them both with file name Tect.txt
I saved your script say a.sh in dir /tmp. and in the same path file also exists.
when i run the script sh a.sh , the error occurs mentioned...

Hi Franklin52,
thanks for your reply....

It is throwing error

awk: cmd. line:2: fatal: cannot open file `
BEGIN{s=sprintf("%-100s", "")}
NR==1{$0=$0 s)}
NR==n{$0=$0 s)}
1' for reading...

thanks for reply.....

I am new to unix....
I require to append 100 spaces(fillers) to header(first line) and 100 space to trailer(last line).
the data in the middle not to be changed.

i do...

Hi ,

i need awk command for which it appends 100 blank spaces for Header (starts wirh H..) and Trailer (starts with T..) in a file.

HODACC(need to add 100 blank spaces here)
D0000......