The Memtest86 boot entries are created by the /etc/grub.d scripts 20_memtest86 and 21_memtest86+. Once you're done, run sudo update-grub to generate a new /boot/grub/grub.cfg. If you want your Windows boot entry first, run this to have that boot entry generated before the Linux kernel entries are generated (in the 10_linux script): sudo mv /etc/grub.d/30_os-prober /etc/grub.d/09_os-prober If you want to change your boot menu order, just change the order of the scripts in /etc/grub.d. If it returns with nothing then swap space isn't available.When update-grub is run, whether by you or by a kernel package installation, it generates /boot/grub/grub.cfg by running, in order, the executable scripts in /etc/grub.d. show option provides us the relevant details. To display whether everything has worked as intended we can issue the following command - swapon -show

In conclusion, we have discussed how to clear swap memory space in Ubuntu distribution. a option is used to enable swap space on all know swap devices i.e. Hence, issue the following command in terminal - sudo swapon -a This would make swap space unavailable in our system. a option is used to disable swap space on all known swap devices i.e. So, to disable swap, issue the following in terminal - sudo swapoff -a

Still, if we want we can use swapoff & swapon command-line utilities to disable and enable swap space briefly. Clear swap memory space in Ubuntu distributionĪlthough kernel does it on its own. In case you don't have one, then contact your System Administrator for assistance. Note: Following operations would require you to have superuser privileges. We assume here that you already have swap file/partition present on your distribution. Swap can be disabled or enabled by using command-line utilities swapoff and swapon respectively. There are times when we need to clear swap space for various reasons. We will discuss it in detail in coming articles. The swap space can be in form of a partition or a file. It also automatically shift applications back from swap to RAM as and when needed. Therefore, it shifts those applications to swap space thereby freeing up RAM. When our RAM gets clogged up, then kernel automatically detects which applications have not been in use or lying idle. In Ubuntu distribution, we have a substitute to RAM space. And, this would continue till we free RAM space by closing applications which aren't required. But, once these applications clogs up RAM then our system would start to slow down. Everything would work fine as long as you have free space available on RAM. Now, consider a scenario wherein you run ' n' number of applications. And, amount of space its going to occupy depends on various factors. Every application we run on our system takes up some space on RAM. We would discuss how to clear Swap memory space in Ubuntu distribution here.

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