如果符号链接指向的文件被移动到另一个地方，符号链接会被更新吗？是否仍然有效？

答案是：不会被更新，失效了，参见wiki：

If a symbolic link is deleted, its target remains unaffected. If a symbolic link points to a target, and sometime later that target is moved, renamed or deleted, the symbolic link is not automatically updated or deleted, but continues to exist and still points to the old target, now a non-existing location or file.