Shell-/Bash-Script to delete old backup files by name and specific pattern

every our backup files of a database are created. The files are named like this:

`
prod20210528_1200.sql.gz 
pattern: proddate +\%Y%m%d_%H%M

`` The pattern could be adjusted if needed. I would like to have a script that: - keeps all backups for the last x (e.g. 3) days - for backups older than x (e.g. 3) days only the backup from time 00:00 shall be kept - for backups older than y (e.g. 14) days only one file per week (monday) shall be kept - for backups older than z days (e.g. 90) only one file per month (1st of each month) shall be kept - the script should rather use the filename instead of the date (created) information of the file, if that it possible - the script should run every day Unfortunately, I have very little knowledge of the shell-/bash-script language. I would do something like this: ````` if (file today - (x + 1)) { if (%H_of_file != 00 AND %M_of_file != 00) { delete file } } if (file today - (y + 1)) { if (file != Monday) { delete file } } if (file today - (z + 1)) { if (%m_of_file != 01) { delete file } } Does this makes any sense for you? Thank you very much! All the best, Phantom