Schroot allows users to switch between different Linux distributions or releases conveniently. As a software developer, I have to test software between different Debian and Ubuntu releases. Schroot perfectly fits my use case.
Besides, schroot has good balance between isolation and convenience. By default, it will mount the home directory …
POSIX shared memory is an inter-process communication (IPC) mechanism defined in POSIX specification. After setting up the shared memory, two (or more) processes may read from and write to the shared memory region. Compared to other IPC mechanisms (e.g. pipe, socket, etc), POSIX shared memory does not impose copy …
User-mode QEMU translates the instructions and the system calls. To run a
static executable, you may wrap the command line with qemu-${arch}.
For example, you may wrap an ARM64 static executable with qemu-aarch64:
$ qemu-aarch64 /path/to/static-executable
However, running a dynamically linked executable requires more efforts. To run a …
I would like to launch ssh-agent and add my private key at the beginning of
my shell script and stop it before leaving the shell script. How do I
guarantee that ssh-agent will be shutted down properly? What will happen
if the user press Ctrl-C or even kill the shell …
GDB is a powerful debugger. Without a doubt, we can debug multi-threaded programs with gdb. In particular, we can switch between threads, inspect the stack, and dump the registers. In this post, I would like to start with the Dining Philosophers Problem, which was first coined by Edsger Dijkstra.
Here …
There are some files that shouldn't be tracked by Git at all. For example, the temporary files created by the text editors, the Python bytecode, and etc.
How could we ignore those files? In the previous post, I have mentioned
that we can create a .gitignore file and list the …
I got an Android Nexus 7 (2013, Wi-Fi) device a short while ago. I attached
the device to my computer and tried to list the devices with adb
devices command. But, unfortunately, I got the following error message:
$ adb devices
List of devices attached
???????????? no permissions
In the following of …
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