linux - Using find command to search for files in one directory which are not in the other, then move them -

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i able use gnu find command in bash find exact filenames in somedir_v1 not match filenames in somedir_v2, , move files somedir_v1 newdir_v1

the thing is, while copy somedir_v2 on somedir_v1, , have newer versions of files, both of these directories have 40gb files. don't know if access time (atime) update when move them, might not know files inside, files replaced , wasn't replaced. anyway, i'm not going way.

if there's bash line can use, please let me know. thank you.


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