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I have these files, which were modified today and yesterday, respectively:

a.txt
b.png

And I want them renamed to:

2020-02-01.a.txt
2020-01-31.b.png

How to do that in a single Bash command?

αғsнιη
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André Willik Valenti
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    Possibly related [Renaming a bunch of files with date modified timestamp at the end of the filename?](https://unix.stackexchange.com/questions/43338/renaming-a-bunch-of-files-with-date-modified-timestamp-at-the-end-of-the-filenam). – Paulo Tomé Feb 01 '20 at 15:57
  • Does this answer your question? [Renaming a bunch of files with date modified timestamp at the end of the filename?](https://unix.stackexchange.com/questions/43338/renaming-a-bunch-of-files-with-date-modified-timestamp-at-the-end-of-the-filenam) – U880D Feb 01 '20 at 16:24

2 Answers2

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ls | while read FILE; do mv "$FILE" "$(stat "$FILE" -c '%y' | cut -b -10). $FILE"; done

Tested on Git Bash on Windows and Linux Mint.

André Willik Valenti
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  • [Why *not* parse `ls` (and what to do instead)?](https://unix.stackexchange.com/questions/128985/why-not-parse-ls-and-what-to-do-instead) – αғsнιη Feb 01 '20 at 16:13
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Using the Perl-based rename utility:

$ rename -n 'use POSIX qw(strftime); s/^/strftime("%Y-%m-%d.",localtime((stat $_)[9]))/e' *.*
rename(a.txt, 2020-02-01.a.txt)
rename(b.png, 2020-02-01.b.png)

(On some systems, rename may be provided as prename).

steeldriver
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