/var/log/messages里大量的如下内容
如何知道是什么进程在尝试umount？

Jul  7 14:23:44 backsrv systemd: Failed unmounting /data/myapp.
Jul  7 14:23:44 backsrv umount: umount: /data/myapp: target is busy.
Jul  7 14:23:44 backsrv umount: (In some cases useful info about processes t
hat use
Jul  7 14:23:44 backsrv umount: the device is found by lsof(8) or fuser(1))
Jul  7 14:23:44 backsrv systemd: Failed unmounting /data/myapp.
Jul  7 14:23:44 backsrv umount: umount: /data/myapp: target is busy.
Jul  7 14:23:44 backsrv umount: the device is found by lsof(8) or fuser(1))
Jul  7 14:23:44 backsrv systemd: Failed unmounting /data/myapp.
Jul  7 14:23:44 backsrv umount: umount: /data/myapp: target is busy.
Jul  7 14:23:44 backsrv systemd: Failed unmounting /data/myapp.
Jul  7 14:23:44 backsrv umount: umount: /data/myapp: target is busy.
Jul  7 14:23:44 backsrv umount: (In some cases useful info about processes t
hat use
Jul  7 14:23:44 backsrv umount: the device is found by lsof(8) or fuser(1))
Jul  7 14:23:44 backsrv systemd: Failed unmounting /data/myapp.
Jul  7 14:23:44 backsrv umount: umount: /data/myapp: target is busy.
Jul  7 14:23:44 backsrv umount: the device is found by lsof(8) or fuser(1))
Jul  7 14:23:44 backsrv systemd: Failed unmounting /data/myapp.
Jul  7 14:23:44 backsrv umount: umount: /data/myapp: target is busy.
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FROM 36.112.6.*