Linux Kernel Study Notes

Linux Kernel learning notes-general Linux technology-Linux programming and kernel information. For more information, see the following. 2.4 before the kernel, all the device files were static in/dev. 2.4 devfs was introduced to dynamically create device files based on the current system. 2.6 is implemented through udev and runs in the user State.

And exists in ram, but whether to use udev is optional during kernel compilation.

All system operations on device files are converted into device-driven functions through VFS.

Udev is running as a daemon in the system.

Linux in usb PDF does not use udev to directly create device files by checking the sysfs File System in the init script.

/Proc exists in the memory rather than on the hard disk.