Mac OS X: What is Safe Boot, Safe Mode?

 
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Old 03-20-2009
Mac OS X: What is Safe Boot, Safe Mode?

Safe Boot is a special way to start up in Mac OS X 10.2 or later when troubleshooting. Safe Mode is the state Mac OS X is in after a Safe Boot. To perform a Safe Boot, hold the Shift key as your Mac starts up.

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ypupdate(3C)															      ypupdate(3C)

NAME
ypupdate: yp_update() - changes NIS information SYNOPSIS
[flag]... file... [library]... Remarks The Network Information Service (NIS) was formerly known as Yellow Pages (YP). Although the name has changed, the functionality of the service remains the same. DESCRIPTION
The routine is used to make changes to the Network Information Service (NIS) database. The syntax is the same as that of (see ypclnt(3C)) except for the extra parameter which can be one of these four values: The data associated with the key will be changed to the new value. If the key is not found in the database, then returns The key-value pair will be inserted into the database. The error is returned if the key already exists in the database. The key-value pair will be stored into the database without concern for whether it already exists or not. The key-value pair will be deleted from the database. This routine depends upon secure RPC and will not work unless the network is running secure RPC. MULTITHREAD USAGE
Thread Safe: No Cancel Safe: No Fork Safe: No Async-cancel Safe: No Async-signal Safe: No These functions cannot be called safely in a multithreaded environment. They may be cancellation points in that they call functions that are cancel points. In a multithreaded environment, these functions are not safe to be called by a child process after and before These functions should not be called by a multithreaded application that support asynchronous cancellation or asynchronous signals. AUTHOR
The routine was developed by Sun Microsystems, Inc. SEE ALSO
ypclnt(3C). ypupdate(3C)