RMAN Backups and Reporting - Oracle RMAN for Absolute Beginners - page 141

Here, 1> instructs standard output to be redirected to the specified file. The 2>&1 instructs the shell script to send
standard error output to the same location as standard output.

■ For further details on how dBas use shell scripts and Linux features, see Linux Recipes for Oracle DBAs by
darl kuhn (apress, 2008).

Tip

Capturing Output with Linux/Unix Logging Commands
You can instruct Linux/Unix to create a log file to capture any output that is also being displayed on your screen.
This can be done in one of two ways:

tee

•

script •

Capturing Output with tee
When you start RMAN, you can send the output you see on your screen to an OS text file, using the tee command:

$ rman | tee /tmp/rman.log

Now, you can connect to the target database and run commands. All the output seen on your screen will be
logged to the / tmp/rman.log file:

RMAN> connect target /
RMAN> backup database;
RMAN> exit;

The tee party session stops writing to the log file when you exit RMAN.

Capturing Output with script
The script command is useful because it instructs the OS to log any output that appears at the terminal to a log file.
To capture all output, run the script command before connecting to RMAN:

$ script /tmp/rman.log
Script started, file is /tmp/rman.log
$ rman target /
RMAN> backup database;
RMAN> exit;

To end a script session, press Ctrl+D, or type exit . The tmp/rman.log file will contain all output that was
displayed on your screen. The script command is useful when you need to capture all the output from a particular
time range. For example, you may be running RMAN commands, exiting from RMAN, running SQL*Plus commands,
and so on. The script session lasts from the point at which you start script to the point at which you press Ctrl+D.