why is this result?

[ishare]

I have a file named by "1", its content is

xyz
123
dfd
xyzdfdf


when I typed : sed 'p' 1 .
it print out :
xyz
xyz
123
123
dfd
dfd
xyzdfdf
xyzdfdf

Obviously ,every line has been duplicated once ,why is this result?



thanks!

[Aurelio Jargas]

sed by default already print every line to the output. When you use the 'p'
command, you're telling sed to print each line again.

Post by ishare
I have a file named by "1", its content is
xyz
123
dfd
xyzdfdf
when I typed : sed 'p' 1 .
xyz
xyz
123
123
dfd
dfd
xyzdfdf
xyzdfdf
Obviously ,every line has been duplicated once ,why is this result?
thanks!
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