Software & AppsOperating SystemLinux

How To Fix “Not Using Locking for Read Only File /var/lib/dpkg/lock” Error on Ubuntu Touch

Ubuntu 5

If you’re using Ubuntu Touch and have encountered the error “Not using locking for read only file /var/lib/dpkg/lock”, you’re not alone. This error can be quite frustrating, but fortunately, it can be fixed with a few simple steps. In this article, we will walk you through these steps in detail.

Understanding the Error

Before we dive into the solution, let’s take a moment to understand the error. The “/var/lib/dpkg/lock” file is a lock file that prevents multiple instances of dpkg from running simultaneously. If this file is read-only, it means that dpkg can’t write to it to create a lock, hence the error message.

Step 1: Opening the Terminal

The first step to resolving this error is to open the terminal app on your Ubuntu Touch device. This can be done by navigating to the app drawer and selecting the Terminal app.

Step 2: Remounting the Root Filesystem

Once you’ve opened the terminal, you need to remount the root filesystem as read/write. This can be done by running the following command:

sudo mount -o remount,rw /

In this command, sudo allows you to run commands with administrative privileges. mount is a command that allows you to mount filesystems, -o is an option that allows you to specify mount options, remount,rw is the option that remounts the filesystem as read/write, and / is the root filesystem.

Step 3: Re-running the Command

After running the above command, you should be able to re-run the command that was giving you the error. For example, if you were trying to install a package using apt-get install, you should be able to run that command again without encountering the locking error.

Step 4: Checking the Block Devices

If you’re still encountering the error after remounting the filesystem, you can run the following command to check the block devices on your device:


This command lists information about all the block devices on your system. It can help you identify any storage devices that might be causing the error.

Step 5: Re-flashing the Device

If none of the above steps resolve the error, you may need to re-flash your device. This involves reinstalling the Ubuntu Touch operating system. However, be aware that this is a last resort and should only be done if absolutely necessary, as it can potentially make your device unusable.


Fixing the “Not using locking for read only file /var/lib/dpkg/lock” error on Ubuntu Touch can be a bit tricky, but with the right steps, it’s certainly doable. We hope this article has been helpful in guiding you through the process. Remember, if you’re ever in doubt, it’s always a good idea to seek professional help.

Important Note

It’s worth mentioning that updating the system using apt-get upgrade can quickly make your device unusable. It is recommended to use the OTA update system instead. This is because the Ubuntu Touch operating system is specifically tailored for mobile devices, and using apt-get upgrade can overwrite these customizations with standard Ubuntu packages.

What should I do if I can’t find the Terminal app on my Ubuntu Touch device?

If you can’t find the Terminal app on your Ubuntu Touch device, you can try searching for it in the app drawer or the app scope. If it’s still not there, you may need to install it from the OpenStore or through the command line using sudo apt-get install terminal.

Can I fix the “Not using locking for read only file /var/lib/dpkg/lock” error without using the terminal?

No, the error can only be fixed by using the terminal and running the necessary commands to remount the root filesystem as read/write.

Leave a Comment

Your email address will not be published. Required fields are marked *