Sysadmins and anyone else writing administrative scripts
should be intimately familiar with the following system
Binaries (executables). Basic system programs
and utilities (such as bash).
More system binaries.
Miscellaneous binaries local to the particular machine.
System binaries. Basic system administrative programs
and utilities (such as fsck).
More system administrative programs and utilities.
Et cetera. Systemwide configuration
Of particular interest are the
(mounted filesystem table), and the /etc/inittab
Boot scripts, on Red Hat and derivative distributions
Documentation for installed packages.
The systemwide manpages.
Device directory. Entries (but not
mount points) for physical and virtual devices.
See Chapter 29.
Process directory. Contains information and statistics
about running processes and kernel parameters.
See Chapter 29.
Systemwide device directory. Contains information and
statistics about device and device names. This is newly
added to Linux with the 2.6.X kernels.
Mount. Directory for mounting
hard drive partitions, such as /mnt/dos, and physical
devices. In newer Linux distros, the /media directory has taken
over as the preferred mount point for I/O devices.
In newer Linux distros, the preferred mount point for
I/O devices, such as CD/DVD drives or USB flash drives.
Variable (changeable) system
files. This is a catchall "scratchpad"
directory for data generated while a Linux/UNIX machine
Systemwide log files.
User mail spool.
Systemwide library files.
More systemwide library files.
System temporary files.
System boot directory. The kernel,
module links, system map, and boot manager reside here.
Altering files in this directory may result in an