Redirection – Simple Stuff

Nobody deals with the really low-level stuff any more; I learned it from UNIX Gurus in the 90s. I was really lucky to have met some real experts, and was stupid not to have better understood the opportunity to pick their brains.

Write to a file

$ echo foo > file

Append to a file

$ echo foo >> file

Read from a file (1)

$ cat < file
Read from a file (2)
$ cat file
Read lines from a file
$ while read f
> do
>   echo LINE: $f
> done < file
$