Linux takes up a lot of disk space, but can't find a solution for large files

1. View disk space usage (it will count the disk space occupied by fragments):

df -Th

 2. Then enter the root directory

cd /

3. View the size of each directory on the disk

du -h --max-depth=1

I found that the space occupied by each directory does not wait for the total disk space of the server to be 399G, and then I thought that deleting some files was occupied by some processes, which caused the kernel to not release space and update the disk display, but the disk directory was Occupied, the update is complete. Inconsistent display. Because the process occupying the file is not closed after the file is deleted, the kernel cannot reclaim the space occupied by these files.

4. pass

lsof -n |grep deleted

Check the command, as shown in the figure below

 5.kill -9 57103 

You can free up disk space.