Problem: Reboot and can’t enter the desktop under ubuntu. I have done nothing about it. Effective solution: Step 1: Enter to tty. Step 2: In…

In linux shell, using “time [executable file]” this command to review the cpu time of user/system. $ time myprog real 0m2.792s user 0m0.099s sys 0m0.200s…

Background: Below error occured when I run “make qemu” command to compile the code. Configure error: A solution is to add a flag to disable…

What is ioremap? ioremap is used to map the I/O address space to kernel virtual address space, so we can access the I/O device. Usage…