Sometimes you just need to do this directly. There are lots of utilities in server administration programs such as cpanel, plesk or virtualmin that will do this for you but if you have shell access here is the quick way.
My best development PC has been plagued by rare data corruption problems that occur most often when updating or handling large files. They were so rare (half a dozen times a year) that I lived with them - until some substantial overnight file processing started hitting issues almost every time I tried it.
Examination of the files showed very infrequent but catastrophic 1 bit errors (for example an 'L' turning to an 'M' in an ascii file).
I often print out a sheet with the module positions on it when I am working on a site but if the printout is not handy I type in the url with index.php?tp=2 at the end to display the module positions.