I working on a JFS filsystem made with the option -O (case insensitive filenames).
How can I easily rename a file from Test.txt to test.txt ?
Using mv report the error:
mv: ‘Test.txt’ and ‘test.txt’ are the same file
And nautilus reports
The name “test.txt” is already used in this location. Please use a different name.
Now I can rename it to Test2.txt followed by renaming to test.txt
You can use the rename command.
It's not actually a built-in shell command, like mv, but a pearl script that comes by default with most GNU/Linux distros. It's usage is a bit different from mv because it uses Pearl regular expressions to compare against a list of files.
Here's how to use it in your case:
rename 's/Test\.txt/test\.txt/' *
The s tells the rename command to search and replace all occurrences of Test.txt with test.txt. The dots . inside the regular expression must be escaped with a \, that's why the filenames are written like Test\.txt. Notice the * at the end of the command, that means to look through all files in the current directory.
You can pass the -n option to the rename command if you want to test it without making any changes.
rename 'y/A-Z/a-z/' *? Note that it will try to rename all files in the current directory to lower case. If none of these options work I'll remove my answer.