Application has simple business logic, provides input data validation and error handling. Errors caused by incorrect data input are displayed on the input page along ...

Redirecting Standard Output To redirect the standard output, use the > operator followed by the destination file or device. The following cat command direct the output to a file called mylog: $ cat ...

The first line writes "hello world" to the file "output", the second reads it back and writes it to standard output (normally the terminal). A "here" document is essentially a temporary, nameless file ...