At 2024-12-02T09:38:28+0800, kindusmith wrote: > 1. First, root and ordinary users will not be able to use commands in > each other's directories, which will greatly increase their security > > 2. If /usr is partitioned separately instead of a unified / partition, > ordinary users can also use commands in /usr/bin, which increases > convenience
There are much better ways to realize both advantages, and others besides. Here's one approach. https://css.csail.mit.edu/6.824/2014/papers/plan9.pdf > Of course, these advantages have become impossible now with the > merging of directories No. Not impossible. One simply has to overcome inertia and the nostalgia that many leading lights in the Linux community have for 1980s Unix systems. As I understand it, the division of root and /usr file systems originates in the capacity limits of disk packs for the DEC PDP-11 and VAX-11 series of computers. It's of a piece with the 640kB RAM limit afflicting the IBM PC architecture. In other words, nonsense that should be discarded with great force at the first opporunity, which arrived decades ago. Regards, Branden
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