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Update filesystem layout documentation

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Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
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David Oberhollenzer 2018-04-19 22:05:31 +02:00
parent adf8fa97f0
commit a148a9bc38
1 changed files with 6 additions and 9 deletions
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15
docs/filesystem.md
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@ -21,11 +21,12 @@ to `/lib`).
The `/usr/share` directory containing application data has also been moved to The `/usr/share` directory containing application data has also been moved to
the filesystem root (i.e. there is a `/share`). the filesystem root (i.e. there is a `/share`).
Many systems have a `/usr/libexec` directory containing executable not intended Many systems have a `/usr/libexec` directory containing executables not intended
to be run by people but by programs. This has been moved to `/lib/libexec`. to be run by people but by programs. This has been moved to `/lib/libexec`.
The `/usr` directory is still present but now serves its original purpose again. The `/usr` directory is still present but now serves its original purpose again.
Storing user home directories. Storing user home directories. For instance, the `/root` directory has been
moved to `/usr/root`.
Since build tools, source code and headers are typically not installed, there Since build tools, source code and headers are typically not installed, there
is currently no need to think about where to put `/usr/include` or `/usr/src`. is currently no need to think about where to put `/usr/include` or `/usr/src`.
@ -52,12 +53,6 @@ kernel and squasfs image in order to apply updates, the later for other
temporary mounts. temporary mounts.
Depending on the system configuration, the `/usr` directory may contain read
only user home directories, may be used as a mount point for a dedicated
partition or network share with home directories, or may be used for an overlay
setup as outlined below.
## Persistent Configuration Changes ## Persistent Configuration Changes
A directory `/cfg` was added to implement an overlay mount setup. The directory A directory `/cfg` was added to implement an overlay mount setup. The directory
@ -80,7 +75,9 @@ squashfs image, but changes can be made. The altered files are stored on the
dedicated partition or device mounted to `/cfg/overlay`. dedicated partition or device mounted to `/cfg/overlay`.
A similar setup is used for the `/var/lib` and the `/root` directories. A similar setup is used for the `/var/lib` and the `/usr` directories. The
`/var/lib` directory combines `/cfg/preserve/var_lib` with overlays from
`/cfg/overlay/var_lib`.
This setup allows for simple management of site local configuration changes, This setup allows for simple management of site local configuration changes,