I have not used schoolOS, but I believe its just like any other linux
distro with special packaging.
Recently, I found an article on how to speed up linux.
The basic reason why linux is slow at launching applications (biggies,
like firefox I mean) is excessive file reading, i.e. the hard disk
head moves a lot, taking longer time.
If one has a CPU with a good rating > 1Ghz, some of this load can be
transferred to the CPU, i.e. by storing the files in a compressed
file. Hence there is lesser data to read and HDD head moves less, but
speed improves.
Because schoolOS is static [I believe; may be wrong], i.e. the core
components won't be updated till a new version is released, we can use
SquashFS to compress /usr and /opt separately and loop mount it (loop
mounting is always read only).
The procedure is something like this:
mkdir /squashed
mksquashfs /usr /squashed/usr.sqfs -always-use-fragments
mksquashfs /opt /squashed/opt.sqfs -always-use-fragments
mv /usr{,.old}
mv /opt{,.old}
mkdir /usr /opt
mount -o loop /squashed/usr.sqfs /usr
mount -o loop /squashed/opt.sqfs /opt
/etc/fstab entry, so that the mounting happens automatically:
/squashed/usr.sqfs /usr squashfs loop,ro 0 0
/squashed/opt.sqfs /opt squashfs loop,ro 0 0
If after boot everything works perfectly fine, then we can rm -rf
/opt.old /usr.old
Do consider this idea.
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Regards,
Nilesh Govindarajan
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