Shell gets the file name extension

basename example.tar.a.b.c.gz. c.gz
# => example.tar.a.b file= "
 
example.tar.gz"
 
echo "${file%%.*}"     Fetch Head   Example 
# => example
 
echo "${file%.*}"      go tail   example.tar.a.b.c
# => Example.tar
 
echo "${file#*.}"      Go head   tar.a.b.c.gz
# => tar.gz
 
echo "${file##*.}"     Take the tail   gz
# => gz
 
# in Bash you can write
filename=$ (basename "$fullfile")   
extension= "${filename##*.}"
filename= "${filename%.*}"
<pre name= "code" class= "python" >eg  Fullfile=/mnt/cos2/venus_gram/rom/leadcore_haige/leadcore_haige_ Autotag201608311742/cos-rom_1.2.-leadcore_haige-201608311742.zip

Then

filename=$ (basename "$fullfile")   

echo "$filename"

Cos-rom_1.2.-leadcore_haige-201608311742.zip

Extension= "${filename##*.}"

echo "$extension"

Zip

Filename= "${filename%.*}"

cos-rom_1.2.-leadcore_haige-201608311742