You’d probably be most familiar with the application known as ‘ WinRAR‘. rar files from your Windows days, assuming you have a history with Windows – as many of us Linux users do. Today’s article will explain how to extract them. rar files all that often with Linux, but sometimes they crop up. You can create the directories named after your RAR files, and then use unrar to extract them there.Today, we’re going to learn how to extract an. It probably accepts the file to extract as a parameter, and a destination folder as an option. You need to install it, then run man unrar to find out how it works. To extract RAR files, you need the unrar command, which is probably provided by the unrar package in your distributions. To remove the RAR extension from a file name, you can use one of the advanced form of variable substitution (officially known as parameter substitution) rar_file="somefile.rar"Įcho "There is a RAR file named $" To check whether a file name exists, is a directory, and other things, you can use the test construct: file_name="/etc"Įcho "$file_name is something other than a directory :(" For example, the following program will print the name of all TXT files in the current working directory: for f in *.txt do To perform actions on all files in a directory, you can use a combination of a for loop and glob patterns. There are a few nice bash starting guides that you can check out. I won't give you a complete script, but I'll show you some of the building blocks that you can use. The overall benefits probably would not be large enough to justify the extra effort to work it out. Bash would not be ideal for that, though: a language with inotify libraries like Python, Ruby or Perl would work better. The more complex alternative is using a permanently running program that listen for file change events. Without having complex requirements, the script could just go through all the RAR files in the folder, select only those for which there are no corresponding folders (where extracted contents are assumed to have been placed), and then extract them. The simpler one, which you can do easily with bash, is using a periodic job (cron job) to check for new files on fixed intervals. You have basically two choices on how to go about it. no need for cronjobs after all! unrar e -o-r %f/*.rar %f/ I just tested the command below and it worked. Unwittingly I've managed to get qbittorrent to work with the external program function. So fingers crossed that it works over the weekend. I had no new files overnight to unrar but testing it last night in terminal worked. I know you can state a location like I have above for all the downloads but I would prefer really if they stayed in there respective folders. The last thing that I would like to do but haven't figured out yet is if there is a way to extract files to the folder they were found in while doing it recursively. And to only search for files created after 1st October as I don't want it to duplicate older extracts that are now in a different location. I've essentially set it to run at 8am every day. I've gone with the following as a cronjob. Can anyone help me at all?Įdit: thanks for all your help guys. I don't know anything about writing scripts on linux so need some help doing this. I'm not always at the computer when they download, so I want to run a bash script that will automatically extract the files into the folder the rar resides in. I have rar files that I download from time to time.
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