Editing Solaris 10 System Administration Part I (section)

=== Pseudo File Systems ===

pseudo file systems are memory based

Some examples of pseudo file systems:
* tmpfs - [http://en.wikipedia.org/wiki/Tmpfs Temporary File System]
* swapfs - swap file system is used by kernel to manage [http://en.wikipedia.org/wiki/Swap_space swap space] on disks
* fdfs - file descriptor file system provides explicit names for opening files by using [http://en.wikipedia.org/wiki/File_descriptor file descriptors] in /dev/fd directory
* procfs - [http://en.wikipedia.org/wiki/Procfs process file system] contains list of active processes from /proc directory, ps command uses information from /proc
* lofs - [http://en.wikipedia.org/wiki/Loop_device loopback file system] provides access to existing files using alternate pathnames
* mntfs - mount file system provides read-only info from the kernel about locally mounted file systems
* objfs - kernel object file system, used by kernel to store details relating to modules currently loaded by kernel, used for the /system/object directory
* devfs - [http://en.wikipedia.org/wiki/Devfs#devfs device file system] is used to manage the namespace of all devices on system, file system is used for the /devices directory
* ctfs - contract file system is associated with /system/contract directory. Used by Service Management Facility (SMF) to track the processes which compose a service

mount command with -p or -v options displays file system types currently in use