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This question already has an answer here:

I have a directory with several duplicate files, created by a program. The duplicates have the same name (except for a number), but not all files with the same name are duplicates.

What's a simple command to delete the duplicates (ideally a single line limited to GNU coreutils, unlike the question about scripts)?

Example filename: parra1998.pdf parra1998(1).pdf parra1998(2).pdf

marked as duplicate by αғsнιη, jimmij, Jeff Schaller, meuh, GAD3R Apr 29 '18 at 16:14

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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    "but not all files with the same name are duplicates", you cannot have two files with same name. Then how you want to detect file parra1998.pdf is not duplicated of file parra1998(1).pdf or it is? Based on their contents? if yes, then your question is duplicated of How to find and delete duplicate files within the same directory? – αғsнιη Apr 29 '18 at 10:32
  • @αғsнιη "same name (except for a number)" – Nemo Apr 29 '18 at 11:56
  • @dsstorefile1 No, this question asks for a simple command while that question is more generic (answers include entire bash scripts, GUI programs etc.) – Nemo Apr 29 '18 at 11:57
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    @Nemo The answers in that question solve the same problem in your question, which is why yours is a duplicate. – dsstorefile1 Apr 29 '18 at 12:07
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    Indeed, I can't parse The duplicates have the same name (except for a number), but not all files with the same name are duplicates -- how do we know if a numbered suffix file is a duplicate of the base name? – Jeff Schaller Apr 29 '18 at 13:21
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A quick and dirty solution is to hash the files, then search the hashes which appear more than once and delete those whose filename is numbered.

For instance: sha1sum * > files.sha1sum cat files.sha1sum | cut -f1 -d" " | sort | uniq -c | grep -v " 1 " | sed --regexp-extended 's/^[^0-9]+[0-9] //g' | xargs -n1 -I§ grep § files.sha1sum | sed --regexp-extended 's/^[^ ]+ +//g' | grep -v '(' | xargs -n1 -I§ rm "§"

  • The line is a bit long and convoluted, but it relies on commands which I use almost daily so that it's easier to remember and adapt. Depending on your habits, using [:blank:] etc. in patterns may be easier. – Nemo May 2 '18 at 7:07

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