[SOLVED] Convert all file extensions in one directory to another file extension

shayno90 · 02-16-2012, 09:37 AM

I would like to convert about 40 files which are all of the same file extension to another file extension within the same directory or into a new directory.

e.g.

/usr/local/share/ovaldi/xml has 40 files with ".xsd" file extension

so either do this:

/usr/local/share/ovaldi/xml with all 40 files with ".oval" file extension
or
/usr/local/share/ovaldi/xml1 with all 40 files with ".oval" file extension

I have done something similar with individual files before but not a whole directory:

cat filename | awk -F ","{ print $4 } for example

Is it possible to do something similar to change the file extensions of all files within a directory or into a new directory?

Thanks in advance.

sag47 · 02-16-2012, 10:00 AM

Code:

ls -1 | while read file;do mv "$file" "`echo $file | sed 's/\.xsd$/\.oval/'`";done

Where ls -1 is the number one.

There's also a built in way to modify variables in bash. These methods work and account for spaces in file names. Here's the variable modifier method..

Code:

ls -1 | while read file;do mv "$file" "${file%.xsd}.oval";done

Take your pick, they both work in bash.

shayno90 · 02-16-2012, 10:04 AM

Quote:

Originally Posted by sag47

Code:

ls -1 | while $file;do mv "$file" "`echo $file | sed 's/\.xsd$/\.xml/'`";done

There's also a built in way to modify variables in bash but that method works and accounts for spaces in file names.

I found this also but it did not work with an error related to the "do" part of the statement

for f in *.xsd; do mv $f `basename $f .xsd`.oval; done;

I will try you script above.

suicidaleggroll · 02-16-2012, 10:09 AM

Code:

for i in *.old; do mv "$i" "${i/.old/.new}"; done

shayno90 · 02-16-2012, 10:13 AM

Quote:

Originally Posted by sag47

Code:

ls -1 | while read file;do mv "$file" "`echo $file | sed 's/\.xsd$/\.oval/'`";done

Where ls -1 is the number one.

There's also a built in way to modify variables in bash. These methods work and account for spaces in file names. Here's the variable modifier method..

Code:

ls -1 | while read file;do mv "$file" "${file%.xsd}.oval";done

Take your pick, they both work in bash.

I "cd" to the correct directory but it did not work (did not specify the filename in the command)

user@user:/usr/local/share/ovaldi/xmltest$ sudo ls -1 | while $file;do mv "$file" "${file%.xsd}.oval";done
mv: cannot `' a `stat': No such file or directory

Did I miss something here?

sag47 · 02-16-2012, 10:16 AM

Quote:

Originally Posted by suicidaleggroll

Code:

for i in *.old; do mv "$i" "${i/.old/.new}"; done

This method won't work if any of the file names have spaces in them.

@shayno90: Yea I edited my original code. I accidentally mis-formatted it.

Although I now realize that your directory may have other files in it so here's a better way to list it.

Code:

ls -1 *.xsd | while read file;do mv "$file" "${file%.xsd}.oval";done

shayno90 · 02-16-2012, 10:19 AM

Quote:

Originally Posted by suicidaleggroll

Code:

for i in *.old; do mv "$i" "${i/.old/.new}"; done

Attempted it without sudo and it seemed to work:

mv: cannot `windows-system-characteristics-schema.xsd' change to `windows-system-characteristics-schema.oval': Permission denied
mv: cannot `xmldsig-core-schema.xsd' change to `xmldsig-core-schema.oval': Permission denied

but after sudoing got this then:

user@user:/usr/local/share/ovaldi/xmltest$ sudo for i in *.xsd; do mv "$i" "${i/.xsd/.oval}"; done
bash: Syntax error beside "do" cannot continue with it.

What is the issue with 'do'?

Cedrik · 02-16-2012, 10:28 AM

Will change extension for all .xsd files to .oval

Code:

cd /dir
rename .xsd .oval *.xsd

shayno90 · 02-16-2012, 10:31 AM

Quote:

Originally Posted by sag47

This method won't work if any of the file names have spaces in them.

@shayno90: Yea I edited my original code. I accidentally mis-formatted it.

Although I now realize that your directory may have other files in it so here's a better way to list it.

Code:

ls -1 *.xsd | while read file;do mv "$file" "${file%.xsd}.oval";done

Ya your script worked great! There were only 2 files with different extensions
oval-definitions-schematron.xsl (unchanged)
results_to_html.xsl (file name format exception and unchanged)

Every other file was in this format xx-xx-xx.xsl and is now xx-xx-xx.oval.

I only need to move the .oval to another directory hence the need to to change the file extension

shayno90 · 02-16-2012, 10:34 AM

Quote:

Originally Posted by Cedrik

Will change extension for all .xsd files to .oval

Code:

cd /dir
rename .xsd .oval *.xsd

Ya I was looking for some command similar to that, thanks for this also.

sag47 · 02-16-2012, 10:35 AM

Quote:

Originally Posted by Cedrik

Will change extension for all .xsd files to .oval

Code:

cd /dir
rename .xsd .oval *.xsd

The man page for my rename command says it requires a perl regex.

Code:

rename 's/\.xsd$/.oval/' *.xsd

Cedrik · 02-16-2012, 10:38 AM

Ah a different rename program then... In my man page for rename command, there is only a note:

Code:

SEE ALSO
       mmv(1), mv(1)
AVAILABILITY
       The rename command is part of the util-linux package and  is  available
       from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

shayno90 · 02-16-2012, 10:48 AM

Quote:

Originally Posted by Cedrik

Ah a different rename program then... In my man page for rename command, there is only a note:

Code:

SEE ALSO
       mmv(1), mv(1)
AVAILABILITY
       The rename command is part of the util-linux package and  is  available
       from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

It is already installed for:

DESCRIPTION
"rename" renames the filenames supplied according to the rule specified as the first argument. The perlexpr argument is a Perl expression which is expected
to modify the $_ string in Perl for at least some of the filenames specified. If a given filename is not modified by the expression, it will not be
renamed. If no filenames are given on the command line, filenames will be read via standard input.

For example, to rename all files matching "*.bak" to strip the extension, you might say

rename 's/\.bak$//' *.bak

To translate uppercase names to lower, you'd use

rename 'y/A-Z/a-z/' *

Cedrik · 02-16-2012, 11:02 AM

Whatever works

suicidaleggroll · 02-17-2012, 10:59 AM

Quote:

Originally Posted by sag47

This method won't work if any of the file names have spaces in them.

Yes it will, the quotes cover that. I use it all the time.

Code:

[eggroll@comp test]$ ls
blah 2 3 4.txt  help me.txt  what.txt
[eggroll@comp test]$ for i in *.txt; do mv "$i" "${i/.txt/.new}"; done
[eggroll@comp test]$ ls
blah 2 3 4.new  help me.new  what.new