[ubuntu-in] Help to reduce the resolution of jpg file

[sivaji j.g]

Is there any way or tool to change the resolution of .jpg file , i got about
50 file each of resolution 2250x1490 and size of about 1.5 MB approximate
.if i upload these file to my website it takes long time to upload and load
the images since the image size and resolution is high

I have to open each and every file in GIMP and save it with low resolution
to reduce the size of these file .i take long time to do like this
is there any simple way to reduce the resolution and size without actually
opening each and every file individually and change it size and resolution


-- 
Thanks a lot
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