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Run a shell script whenever a file in a certain directory changes? (lemmy.ml)

submitted 8 months ago* (last edited 8 months ago) by helloworld@lemmy.ml to c/linuxquestions@lemmy.zip

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Using a shell script, can I watch a folder and block program execution until a file in a certain folder changes?

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[–] testfactor@lemmy.world 2 points 8 months ago

Even if you wanted to implement a solution like this, which you shouldn't, why on earth monitor the MD5 sum instead of just the mtime of the file???? Like, doing a checksum is the least efficient method of checking this possible.

Like, you could do a simple while loop with a find myfile.txt +mmin 1; sleep 30 in it. Adjust numbers to your desired tolerance.

Again, don't do that. But if you must, definitely don't do an md5sum for godssake.