Ubuntu disable swap. You must apply the change now. Jul 27, 2023 · In this tutorial, we discussed how to permanently disable swap space in Linux, an operating system known for its stability, security, and flexibility. Disabling swap on Linux systems, including CentOS and Ubuntu, can be done using a few simple commands. Resize your main / other partition with right click -> Resize/Move. Keep checking how your computer is doing to make sure it works well. Delete the swap partition with right click -> Delete. Always ensure your system has enough RAM to avoid instability! 3 days ago · Nothing fancy — just lessons I’ve paid for with real production incidents. Is it enough to comment or remove the swap Aug 10, 2023 · In this tutorial you will be learning how to turn off the swap memory system on your Ubuntu operating system. Nov 7, 2025 · By following these steps, you can safely disable swap on Linux—whether for testing or permanent use. May 7, 2017 · Ubuntu 17. I am running a custom compiled 3. Swap makes my system all sluggish and turning it off makes everything smoother. 0), if I run out of memory, and swap is not enabled, programs will. This quick tutorial shows the steps for disabling swap in Linux. 5 GB of RAM. Apr 26, 2025 · Conclusion Now you know how to turn off and remove a swap file on Ubuntu. This blog will provide a detailed guide on how to disable swap in Ubuntu, covering fundamental concepts, usage methods, common practices, and best practices. 04 introduces a swap file to replace swap partitions. I have 3. May 23, 2021 · To disable swap permanently, comment out (or remove) any swap entries from /etc/fstab: Finally, you can delete the actual swap files using the rm command, for example: If the swap space was created using LVM, you may also want to remove the corresponding logical volume: ACTIVE '/dev/ubuntu-vg/root' [114,52 GiB] inherit. I also use init if it makes a difference. Permanently Disable Swap: To prevent swap from being Jun 9, 2015 · Note that the access time for swap is slower therefore do not consider it to be a complete replacement for the physical memory. Follow our commands and tips to optimize performance and manage system memory. Swap space can be a dedicated swap partition (recommended), a swap file, or a combination of swap partitions and swap files. As I can see from my graph, Ubuntu is using much more swap than it should. 9 kernel and I am wondering about the best way to disable swap on the system. However, I would prefer not to have any disk-based swap space at all, so I would like to know how to turn the swap file off. Are you sure that Ubuntu is using your swap before it fully uses the ram? What's the output with free -m? Usually, turning off swap won't make a difference as Ubuntu tries to use the ram as much as possible, and it shouldn't happen that ram is unused and swap is used. I know how to turn swap off by entering sudo swapoff -a in the terminal, but that's just for the Jul 13, 2023 · How to Check Swap Space in Linux Before actually disabling swap space, first, you need to visualize your memory load degree and then identify the partition that holds the swap area, by issuing the below free command. Here are the steps for both operating systems: For CentOS and Other RHEL-based Distributions: Turn Off All Swap Spaces: sudo swapoff -a This command disables all active swap spaces immediately. I am using Debian sid, hard drive formatted with ext4, running on linux 3. 18. You may disable swap after reboot by just commenting out (add # in front of the line) the swap entry in the /etc/fstab file. Swap space is the portion of the hard disk that is used by the operating system as virtual memory, which helps to prevent the system from running out of memory. It will prevent the swap partition from automatically mounting after a reboot. Make sure your computer has enough RAM for your needs before you decide to remove the swap file. Remember, the swap file is important for managing your computer’s memory. Aug 19, 2015 · As the GParted reactivates the swap partition upon launch, you will have to right-click the particular swap partition and click Swapoff -> This will be applied immediately. Why Are Freshly Installed Servers Prone to Trouble? A fresh Ubuntu Server 22. 04 install looks fine on the surface, but there are a few genuinely dangerous defaults if left unchanged: SSH allows password login: Bot scanners constantly sweep the entire internet. Aug 15, 2025 · Learn how to disable swap in Linux temporarily or permanently. Feb 10, 2020 · In scenarios like changing the swap size, you should disable the swap first. What is Swap Space? Swap space is an area on the hard drive that the operating system uses as an extension of the system's physical memory. 1 I remember on previous linux versions (maybe before 3. Oct 8, 2021 · To permanently disable Linux swap space, open the /etc/fstab file, search for a swap line and add a # (hashtag) sign in front of the line to comment on the entire line, as shown in the screenshot below. Apr 26, 2025 · This article provides a clear, step-by-step approach to turn off, disable permanently, and even remove a swap partition if desired. However, it’s important to note the potential risk involved. eex yrd rko jwy rmu obr vjd oup eak ypy vcr ofs vzm xwm qku