Add suffix to all files in the directory with an extension

Question

How to add a suffix to all files in the current directory in bash?

Here is what I've tried, but it keeps adding an extra .png to the filename.

for file in *.png; do mv "$file" "${file}_3.6.14.png"; done 

Answer 1

for file in *.png; do     mv "$file" "${file%.png}_3.6.14.png" done 

${file%.png} expands to ${file} with the .png suffix removed.

Answer 2

You could do this through rename command,

rename 's/\.png/_3.6.14.png/' *.png 

Through bash,

for i in *.png; do mv "$i" "${i%.*}_3.6.14.png"; done 

It replaces .png in all the .png files with _3.6.14.png.

• ${i%.*} Anything after last dot would be cutdown. So .png part would be cutoff from the filename.
• mv $i ${i%.*}_3.6.14.png Rename original .png files with the filename+_3.6.14.png.