In 2011, hackers successfully cracked the main Linux development site, kernel.org. Afterward, to make sure this didn't happen again, the kernel's PGP web of trust was explicitly "bootstrapped" at a face-to-face key‑signing session during the 2011 Kernel Summit.
RPL == CPL (same privilege)
。关于这个话题，爱思助手下载最新版本提供了深入分析
lowerdir is the read-only directory (composefs) containing file metadata, and datadir is the directory containing the data (erofs).
（一）结伙斗殴或者随意殴打他人的；