Archives

View by device: or view by PID:

Check the libstdc++.so.6 file version linked against the executable file. Prepend LIBGL_DEBUG=verbose to get debug information.

Officially, 2021 R1 only supports up to RHEL 8.1. Launching 2021 R1 on RHEL 8.4 complaints Downgrading openssl (multiple times needed depending on the current openssl version) can solve the problem However, it is extremely unsafe to stay at old version libs. But we can copy the old version libraries to another folder and upgrade […]

Ante-install Post-install

This might be caused by the conflict with netfilter-persistent. One can check it by to see whether netfilter-persistent has been enabled. If it is the case, one can disable it by Now ufw shall start on boot automatically.

List all dependencies for all installed packages: List all packages that are NOT dependencies of any other packages: List all packages depending on specified package ‘pac’: List all packages depending on all packages using ‘brew list’:

Recently, I came across ‘Forbidden’ error several times when I was trying to download files I had uploaded from Mac to my website running Apache2. And I found if the file was generated by Linux and uploaded also from Linux, then everything would be OK. This error is (sometimes) caused by Mac OS Extended Attribute […]

I use swift to solve these questions and the solutions are uploaded to my GitHub irregularly scheduled. My friends also provide cpp, python and Java versions of solutions at Yangyao’s repository. I really appreciate your comments for our solutions.