Justin taught me an undocumented REN feature to chop off everything from a file name after the last occurrence of a specified character: REN testfile.txt *s The proper way to do this in NT is: FOR %%A IN (*.txt) DO REN "%%~fA" "%%~nA1.*"įor each *.txt file, "%%~fA" resolves to the (doublequoted) fully qualified path, and %%~nA1 to the original file name only, with a 1 appended, and. Try that in Windows (XP) and you'll get *.txt1.txt files. If I remember correctly, in the old MS-DOS days, it was possible to append characters to the file name using the command: REN *.txt *1.txt You can even use wildcards in filename1 (and filename2) to rename, say, all your (very) old MS-DOS (ASCII) help files from *.doc to *.txt: REN *.doc *.txt Note that you cannot specify a new drive or path for your destination file. ![]() VoltCraft Energy Logger 3500 ConfigurationĮver since the earliest DOS versions the RENAME and its "twin" (or alias?) REN have been around to allow us to change file names: REN or RENAME.Exploring the Youless LS120 Energy Monitor.The final working code that can take care of duplicate file names and slashes is this ( be careful this will rename files immediately not a dry-run): for f in *. One more thing is if the first line in the file contains slashes / this is not acceptable and will result in an error so you need to redefine the variable $f1 and change them to underscores _ by adding this line to the code after f1=$(head -n1 "$f"): f1="$" Remove echo for the actual renaming to happen.Īlso note that the actions of the mv options ( -n or -backup=t) will not be reflected in the output while echo is used but will take effect when echo is removed. If however the first line in each file is not unique, you can make mv append numbers to the new file names if they already exist by using the option -backup=t after mv like so:Ĭhange this line in the above code: echo mv -n "$f" "$f1"Įcho is there to protect your files from unintentional change while testing the code and to give you a dry-run of what will actually happen. That is why I added the option -n after mv to prevent that. ![]() The first line in each file must be unique or otherwise some files will get overwritten. When satisfied with the results, remove echo to do the actual renaming like so: for f in *.pgn Run the above from within the directory containing the files to see a dry-run (no actual renaming will happen). To rename all the files at once, use head to get the first line in the file and mv to rename the file with a for loop like so: for f in *.pgn Only changing of names is required, replacing it with first line of the file content for all 2015 files. But I do not want to change the extension here. pgn file (This is a type of simple text file, it is Portable Game Notation used for entering chess moves).pgn files can be saved as. So the name of this file should change from eco_1.pgn to Įach and every file is a. A sample file is shown in the image in which the first line is: I want to rename each and every of these files to match exactly the first line of respective file content. Existing names of the files are eco_1.pgn, eco_2.pgn. Is there any easy way to mass rename based on file content(first line) for this? If someone can help, I thank them very much. ![]() The file name is eco_1.pgn and I want this to change to the first line of file content which is shown in the picture This I wish to do for all the 4030 files I have at once in one operation if possible. ![]() I am I want to mass rename these files replacing their name with the first line of the respective file content in Ubuntu 20.10. This is a form of text file only, opens with Notepad++.
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