How to rename files by batch? I use OI file manager, but I would like to know if there is a way to remove spaces from file names and replace them with underscores, preferably in batch mode?

I would even be willing to perform this operation on my windows laptop, so this isn't specifically an Android question, though I'd prefer to do this on my phone. I'm a graphic artist and I have thousands of inconsistently named images in various places, and I'd really like to avoid doing this manually, one by one, as it would take months!
This is certainly possible with tasker, though I cannot give you the "complete recipe". Basically, you could create a task like this:


Execute Command: ls -1 /path/to/your/files, and capture the output into a variable
the command will list all files in the given directory, one file per line
Work on the variable. There are possibilities to convert it into an array, so you can use a for loop to handle each file
again with variables, you can setup the rename command (e.g. using Variable Search Replace) in a new variable. Pseudo-Code: mv "$old_name" "$(s/ /_/,$old_name)"




But it is much easier to use a simple shell script in some terminal app (or via adb shell) to achieve the same:

cd /path/to/your/files
for file in $(ls -1); do mv "$file" "$(echo $file|sed 's/ /_/g')"; done