If /proc/sys and /sys are the same, can I change the kernel options in /sys not in /proc/sys?
If not, why?
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They are not the same: /proc/sys gives access to sysctl files, which provide various configuration options for kernel features; sys is sysfs, which gives access to kernel data structures.
Some of these might overlap, so a setting in /proc/sys could show up in the corresponding data structure in /sys. In such cases you can’t change one without changing the other.
Stephen Kitt
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