Have so a command test - "$f env" & amp; & . "$env & gt;" |/dev/null
See the redirection symbols alone & gt; I know the meaning, see a symbol | line alone I can understand, can & gt; | how to understand?

CodePudding user response:

I think the pipe symbol is not necessary, with and without the effect of the implementation is redirected

CodePudding user response:

Redirected to the basic use less than | specified file