What is the difference between "Redirection" and "Pipe"?  view
full story  http://askubuntu.com – This question may sound a bit
stupid, but I can not really see the difference between
redirection and pipes. Redirection is used to redirect the
stdout/stdin/stderr, e.g. ls > log.txt. Pipes are used to give
the output of a command as input to another command, e.g. ls |
grep file.txt. But why are there two operators for the same
thing ? Why not just write ls > grep to pass the output through,
isn't this just a kind of redirection also ? What I am missing ?
(HowTos)