CODEWITHSUNDEEP
bashrenamefile-rename
Stefan
Stefan

Reputation: 359

Renaming files with adding a number to filename in bash

I have lots of file like these:

13831_1.jpg
13838_1.jpg
138035_1.jpg
138037_1.jpg
138039_1.jpg

I need to add a value of 5000000 to the numbers of the filenames. The result should be the following:

5013831_1.jpg
5013838_1.jpg
5138035_1.jpg
5138037_1.jpg
5138039_1.jpg

Is there a way to do it with bash or perl?

Upvotes: 9

Views: 10570

Answers (3)

ankit singh
ankit singh

Reputation: 367

$filename      = "13831_1.jpg";
$org           = explode("_".$filename);
$addnumber     = 5000000+$org[0];
$string        = implode("_",$addnumber);

Upvotes: -3

doubleDown
doubleDown

Reputation: 8398

One way to do this using only bash

for file in *.jpg; do
  number=${file%_*}
  therest=${file#$number}
  mv "$file" "$((number+5000000))$therest"
done

Notes:

  • *.jpg will expand to a list of .jpg files in current directory (ref: Filename expansion).
  • ${file%_*} removes everything after _ in the file name and return it. (ref: Shell parameter expansion)
  • ${file#$number} removes the content of variable number from the beginning of the file name and return it. (ref: Shell parameter expansion)
  • $((number+5000000)) evaluates the arithmetic expression inside and returns the result (ref: Arithmetic expansion)

Upvotes: 6

user80168
user80168

Reputation:

Do: rename -v. If it will output:

Usage: rename [-v] [-n] [-f] perlexpr [filenames]

This check is because there are at least two different rename tools, with very different functionalities. And the solution I'm having requires rename that handles perlexpr.

Then you can:

rename 's/^(\d+)/5000000+$1/e' *.jpg

Upvotes: 9

Related Questions