Mv files suffix in batch in one dir
一、# and %
#! /bin/bash
FILE=dir1/dir2/dir3/my.file.txt
echo "The source string"
echo ${FILE} #dir1/dir2/dir3/my.file.txt
echo "Cut the first / and the characters left beside it"
echo ${FILE#*/} #dir2/dir3/my.file.txt
echo "Cut the last / and the characters left beside it"
echo ${FILE##*/} #my.file.txt
echo "No function,just put out the source string"
echo ${FILE#/*}
echo "Cut the first / and the characters right beside it"
echo ${FILE%/*} #dir1/dir2/dir3
echo "Cut the last / and the characters right beside it"
echo ${FILE%%/*} #dir1
echo "No effect, just put out the source string"
echo ${FILE%*/}
#Remember like this
## left
#% right
#one first
#two last
FILE2=my.file.txt
echo "file name"
echo ${FILE2%%.*}
echo "suffix"
echo ${FILE2##*.}
Result
The source string
dir1/dir2/dir3/my.file.txt
Cut the first / and the characters left beside it
dir2/dir3/my.file.txt
Cut the last / and the characters left beside it
my.file.txt
No function,just put out the source string
dir1/dir2/dir3/my.file.txt
Cut the first / and the characters right beside it
dir1/dir2/dir3
Cut the last / and the characters right beside it
dir1
No effect, just put out the source string
dir1/dir2/dir3/my.file.txt
file name
my
suffix
txt
二、Realize
[braveyly@m-net ~/bakfilerename]$ ls
1.c 2.c 3.c 4.c
#!/bin/bash
for file in$(find . -name "*.c" -type f)
do
echo $file
echo "${file%%.*}" # print null ?
echo "${file%%.*}.o"
echo "${file%.c}.o" # cut the first . and the c right beside it ????
mv "$file" "${file%.c}.o"
done
[braveyly@m-net ~/bakfilerename]$ ./rename.sh
./1.c
.o
./1.o
./2.c
.o
./2.o
./3.c
.o
./3.o
./4.c
.o
./4.o
