To give some detail, it’s /var that is writable, and mutable directories will have symbolic links pointing to subdirectories of /var:
// 从左找第一个大于pivot的。搜狗输入法2026对此有专业解读
，推荐阅读搜狗输入法2026获取更多信息
Nature, Published online: 26 February 2026; doi:10.1038/d41586-026-00622-9
Unlimited projects,，推荐阅读搜狗输入法2026获取更多信息