sending data to log file - shell script -


can please explain these expressions me:

cd - 1>> $log   // q -  1 represent ?  ./build_we2s 1>> $log 2>> $log // q -  2 represent ? 

1    stdout  standard output 2    stderr  standard error  cmd 1>> $log append stdout (only) $log cmd 1>> $log 2>>$log append stdout , stderr $log

you do

cmd >> $log 2>&1

or

cmd &>>$log

too


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