SED : Remove last four characters from filename

I had list of files in the folder named test_images as below

006103insettedryshampoo-blossom7096.jpg
008299bathmassagesponges-3packa1a4.jpg
008507colgatetripleactiontoothpaste125d.jpg
8729teatreeoilantisepticcream25g1005.jpg

i want to rename all file by removing last four characters from each of them as

006103insettedryshampoo-blossom.jpg
008299bathmassagesponges-3pack.jpg
008507colgatetripleactiontoothpaste.jpg
8729teatreeoilantisepticcream25g.jpg

How can i do it using sed ?

Any suggestion will be appreciated.

Thanks in advance 🙂

Answer

if your file names don’t have spaces, you can: (under your test_images dir)

ls -1|sed -r 's/(.*)....(.jpg)$/mv & 12/'

to check the generated mv command. If it is ok, add |sh to the above command to do the actual renaming.

If your filenames have spaces, you need add quotes:

..../mv "&" "12"/'|sh

This is a quick and dirty solution, since working with ls result is not good practice.

update: add “how to” example:

LsyHP 11:41:40 /tmp/test/img
kent$  ll
total 0
drwxr-xr-x 2 kent kent 120 Jan  4 11:41 ./
drwxr-xr-x 3 kent kent 160 Jan  4 11:41 ../
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 006103insettedryshampoo-blossom7096.jpg
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 008299bathmassagesponges-3packa1a4.jpg
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 008507colgatetripleactiontoothpaste125d.jpg
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 8729teatreeoilantisepticcream25g1005.jpg
LsyHP 11:41:43 /tmp/test/img
kent$  ls -1|sed -r 's/(.*)....(.jpg)$/mv & 12/'
mv 006103insettedryshampoo-blossom7096.jpg 006103insettedryshampoo-blossom.jpg
mv 008299bathmassagesponges-3packa1a4.jpg 008299bathmassagesponges-3pack.jpg
mv 008507colgatetripleactiontoothpaste125d.jpg 008507colgatetripleactiontoothpaste.jpg
mv 8729teatreeoilantisepticcream25g1005.jpg 8729teatreeoilantisepticcream25g.jpg
LsyHP 11:41:52 /tmp/test/img
kent$  ls -1|sed -r 's/(.*)....(.jpg)$/mv & 12/'|sh
LsyHP 11:41:57 /tmp/test/img
kent$  ll
total 0
drwxr-xr-x 2 kent kent 120 Jan  4 11:41 ./
drwxr-xr-x 3 kent kent 160 Jan  4 11:41 ../
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 006103insettedryshampoo-blossom.jpg
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 008299bathmassagesponges-3pack.jpg
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 008507colgatetripleactiontoothpaste.jpg
-rw-r--r-- 1 kent kent   0 Jan  4 11:41 8729teatreeoilantisepticcream25g.jpg