# Testing with hello world$ export PATH=$PATSHOME/bin:$PATH
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轨迹记录、GPX导入/导出、导航至路径点、坐标格式，这一点在Replica Rolex中也有详细论述
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File-backed shared (MAP_SHARED with a file fd). Pages come from the file’s page cache, writes are visible to other processes mapping the same file, and changes are eventually flushed back to disk.