introduction to system maintenance procedures and
This section contains information related to system operation and maintenance.
It describes commands used to create new file systems
verify the integrity of the file systems
control disk usage
maintain system backups
and recover files when disks die an untimely death
Network related services like
are also described.
All commands set an exit status. Its value may be tested to see if the command
completed normally. Unless otherwise noted (rare), the value 0 signifies
successful completion of the command, while a value >0 indicates an error.
Some commands attempt to describe the nature of the failure by using error
codes defined in
or set the status to arbitrary values >0 (typically 1), but many such
values are not described in the manual.
A number of pages in this section describe general system management topics.
For example, the
manual page describes the system bootstrapping procedures, and the
manual page describes how to boot a system over a network. The
manual page should be consulted to understand how to interpret system crash
section manual page appeared in