如何在复制到 unix 目录时用空格替换文件名中的下划线

Question

I want to copy a file (containing underscores in its name) to a directory where I want to replace underscores with spaces in the filename.

 cp -pr myDir/myFile_With_Underscore.pdf my2Dir

I want to put filename with replacing underscore with spaces in my2Dir.

Like myFile_With_Underscore.pdf should be myFile With Underscore.pdf in my2Dir.

Answer 1

you could use the tr command (see: man tr ):

cp "/path/to/${source}" "/new/path/to/$(echo ${source} | tr '_' ' ')"

tr will translate one set of chars to another, thus replacing every _ with a space.

One very important note: Do not forget to quote the copy parameters when containing spaces. Without quotes every word would be considered a seperate character. So:

cp my_file my new file # NOT OK
cp my_file "my_new_file" # OK, as the parameter with spaces is quoted
cp "my_file" "my new file" # Also OK. Quotes on the first not neccessary, but dont hurt either

As tr will do, you could also do this with several other commands such as sed or awk . For example using sed :

cp "/path/to/${source}" "/new/path/to/$(echo ${source} | sed 's/\_/ /g')"

But I would recommand sticking to tr with such easy tasks.

Answer 2

You can use rename for this, to change all PDF files in the current directory, do

rename 'y/_/ /' *.pdf

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In your concrete example do:

cp -p myDir/myFile_With_Underscore.pdf my2Dir && rename 'y/_/ /' my2Dir/myFile_With_Underscore.pdf

Answer 3

What about something like this:

for i in myDir/myFile_With_Underscore.pdf; do \
cp $i myDir2/${$(basename $i)//_/ }; done

If you were in the same directory where the origin file is located you could omit the basename , for example:

for i in .myFile_With_Underscore.pdf; do cp $i ../myDir2/${i//_/ }; done

Notice the ${i//_/ } , in order to manipulate the name of the file, the name needs to be in the variable $i therefore the use of the for i in

${string//substring/replacement} Replace all matches of $substring with $replacement .