Hi, I have further investigated the problem, here is more information: That the same problem of missing busybox was not just occurred during the device running in the middle of operation, it was also occurred during booting image from NAND, I saw several times that the first and second cycles of booting image from NAND were working well, then some following booting process would be crashed by missing busybox, then could not run whole shell commands. I have been pondering if it could be caused by NAND issue or network virus / fishy? Appreciate any clues. Thank you. Kind regards, - jh On 1/26/20, JH <jupiter.hce@xxxxxxxxx> wrote: > Hi, > > I have been building and running Yocto image on iMX6 with NAND flash > for a year, recently, I found that busybox was certainly missing > mysteriously, I could not check ls and other shell commands. I could > not figure out what caused that problem, it's like the flash is > leaking. Appreciate tips how to debug it? > > Thank you. > > - jh > ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/