shell obtain the file extension (prefix, suffix)

#!/bin/bash

filename=rongtao.tar.gz

echo "${filename%%.*}"

echo "${filename%.*}"

echo "${filename#*.}"

echo "${filename##*.}"

#运行结果:
#  sh extension.sh 
#rongtao
#rongtao.tar
#tar.gz
#gz

 

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Origin blog.csdn.net/Rong_Toa/article/details/104252766