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bash tip: Set output redirection from within a script

Small but useful tip.
If for some reason you need to set the redirection of a script ( and stdout / stderr or ) without using the redirection operators (as well described for example on the site dell'ILDP ) or directly from within the script from the command line, here's a possible solution:

 
 # / bin / sh exec 
 
> prova.log 2> & 1 
 
 echo "These two lines printed "
 echo" will be in prova.log "