Purpose
With no arguments, show the current setting for the OBSERVER
keyword. With an argument, reset the value of the OBSERVER
keyword to the given string.
Usage
observer [value]
Arguments
value = new valeu for the OBSERVER keyword
Output
Value of the OBSERVER string is written to stdout
Restrictions
Names containing characters with special meaning to the shell
(e.g., *()!&#) must be enclosed within double quotes (").
Exit values
0 = normal completion
Example
1) show the current observer name
observer
2) reset the current observer name to "Bigshot Astronomer"
observer Bigshot Astronomer
3) reset the current observer name to "Tinker, Evers, & Chance"
observer "Tinker, Evers, & Chance"