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unixshelltee

Unix and tee — chain of commands

In a Unix environment, I want to use tee on a chain of commands like so:

$ echo 1; echo 2 | tee file
1
2

$ cat file
2

Why does file only end up as having the output from the final command?

For the purposes of this discussion, let's assume I can't break them apart and run the commands separately.

Solution

  • Try: 

     ( echo 1; echo 2 ) | tee file

    Without the parentheses, it's getting parsed as:

     echo 1 ; ( echo 2 | tee file )