BasicS ...
Most of the cases we use this redirection operators in shell script or at prompt level.
./scriptname.sh > logfile To send the standard output of ./scriptname by replacing the existing logfile
./scriptname.sh >> logfile To send the standard output of ./scriptname by appending the existing logfile
./scriptname.sh 2> logfile To send the standard error while running the scriptname.sh
./scriptname.sh 2>> logfile To send the standard error while running the scriptname.sh with append
Lets go to some advanced...
To send standard error as well as standard output to logfile./scriptname.sh 2> logfile >&1
(OR)
./scriptname.sh > logfile 2>&1
