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====Frugal or Full Installation====
~This page explains the differences between [[Frugal]] and [[InstallationFullHDD Full]] installation.

==Full Installation==
~In a **Full installation** the system files ([[RootFS|Linux directory structure]]) takes up a whole [[WikiPedia:Disk_partitioning drive partition]]. The contents from Puppy Linux's BaseSFS are extracted to the linux directory structure. All subsequent software installations, file edits and additions are made directly to the partition's file system. The directory structure is stored as it appears in the [[FileManagers file manager]] or listed by a [[TerminalEmulator terminal emulator]].

==Frugal Installation==
~In a **Frugal** installation the system files ([[RootFS|Linux directory structure]]) are compressed into a couple of file (technically filesystems within a file):
~When first run:
~~- the Puppy Linux initializes the layered file system starting with the [[BaseSFS]] (also known as ""PupSfs""). This is a [[SquashFS Sfs file]] containing Linux file system and directory structure ([[RootFS]]) The file is either accessed from the disk or loaded into RAM (read only) eg. lupu_528.sfs
~Additional files:
~~- the Puppy [[SaveFile 'save file']] containing settings, additional software, modifications etc. (read/write) eg. lupusave-mysave.2fs
~~- additional software [[SquashFS Sfs files]] (read only) eg. Gimp_2.7.3_528.sfs
~On start-up these file-systems are super-imposed upon each other so that they appear merged. Additional files and alterations are written to the Puppy Save File (if within the Linux directory structure). The directory structure viewed in a [[FileManagers file manager]] or listed by a [[TerminalEmulator terminal emulator]] is actually **contained within** these compressed files.
~For more information see [[ How Puppy works]].


|=||=|Full|=|Frugal (not in RAM)|=|Frugal (copied to RAM)|=|
|=|Drive partition required||Yes||No||No||
|=|Installation directory || Requires a drive [[WikiPedia:Disk_partitioning partition]]|| Almost any directory || Almost any directory ||
|=|Speed || Medium||Likely to be slower|| Faster||
|=|Installation file system || Linux Type ||FAT, NTFS, Linux Type || FAT, NTFS, Linux Type ||
|=|Installation Protection ||[[RootFS]] writable with root user access||BaseSfs Read only ||BaseSfs Read only||
|=|[[SaveFile Pup SaveFile]] || No, directly accesses [[RootFS]] || Yes, saved directly to disk|| Yes, in RAM (saved to disk on request/reboot)||
|=|Load/Unload [[SquashFS SFS]] files||Harder||Easy ||Easy||

==Also on the Wiki==
~[[HowtoAddSFStoFullInstall How to Add SFS to Full Installation]]

==Related Webpages==
~[[ Detailed Explained of How Puppy Installs (]]

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