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  1. #!/bin/bash
  2. sed -E 's/.*([0-9]{4})_([0-9]{2})_([0-9]{2})_([0-9]{2})_([0-9]{2})_([0-9]{2}).*/\1-\2-\3T\4:\5:\6/'
Success #stdin #stdout 0s 4456KB
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stdin 
./file_timestamp_2020_02_11_09_00_19
stdout 
2020-02-11T09:00:19
https://ideone.com/JEj0sp
language:
Bash (bash 5.0.3)
created:
4 years ago
visibility:
secret

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