Bash 如何重命名保存到变量中的文件？
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Bash how can rename a file saved into a variable?
提问by rschirin
how can I do this:
我怎样才能做到这一点：
I have a file, eval.txtsaved into a variable, that I want to rename timestamp_eval.txt
我有一个文件，eval.txt保存到一个变量中，我想重命名timestamp_eval.txt
filetosend=/home/cft/eval.txt
filename=$(echo $filetosend | cut -d '/' -f4) //to get only the name
DATE=$(date +%Y%m%d)
filename=${DATE}_${filename} //add timestamp to name
how can I rename $filetosend?
我该如何重命名$filetosend？
I found this solution:
我找到了这个解决方案：
DATE=(date +%Y%m%d)
mydir=$(echo $(dirname $a))
myfile=$(echo $(basename $a))
myfile=${DATE}_${myfile}
filetosend=$mydir/$myfile
cp $a $filetosend
回答by Gilles Quenot
Try doing this if you really need a variable:
如果您确实需要一个变量，请尝试这样做：
filetosend=/home/cft/eval.txt
cd "${filetosend%/*}"
filename="${filetosend##*/}"
DATE=$(date "+%Y%m%d")
filename="${DATE}_$filename"
mv "$filetosend" "$filename"
If you don't really need a variableusing rename:
如果你并不真的需要一个变量使用rename：
rename "s|[^/]+$|$(date +%Y%m%d)_$&|" /home/cft/eval.txt
or decomposed on multi-lines :
或在多行上分解：
cd /home/cft/
rename "s/.*/$(date "+%Y%m%d")_$&/" eval.txt
rename "s|[^/]+$|$(date "+%Y%m%d")_$&|"
Note
笔记
Read this postto know if you have the good renameon your system + extra explanations.
阅读这篇文章以了解rename您的系统是否有优势+ 额外的解释。
回答by Chris Seymour
The simplest way would be to do:
最简单的方法是：
mv /home/cft/eval.txt /home/cft/$(date "+%Y%m%d")_eval.txt
回答by Benubird
Using the mv command. "mv" is short for "move".
使用 mv 命令。“mv”是“移动”的缩写。
mv $filetosend $filename
