Or # mkswap /mnt/swapfile 4) Enable Swap space Setting up swapspace version 1, size = 524284 KiB Run the following command define /dev/sdb1 as swap partition: # mkswap /dev/sdb1 You may use -L option to set LABEL on the swap partition. Make sure to choose the correct partition number which you need to enable swap. 3) Format to swap modeĪfter defining our partition, we need to format it for "swap mode" so run mkswap command on the newly created swap partition.
# fallocate -l 2G /mnt/swapfile # chmod 600 /mnt/swapfile Just use dd command or fallocate to create a file (say 1 GB or 2GB). Note: On the latest version Ubuntu and Centos it uses create swap file instead of a swap partition. You can see the mention 'Linux swap' on the last line. Let's check with fdisk -l command: # fdisk -l Now we will save the changes with w command Command (m for help): wĬalling ioctl() to re-read partition table.
How to create boot partition in linux code#
The Hex code for swap partition on Linux is 82. To define now our partition as swap type, we will use t command Command (m for help): tĬhanged type of partition 'Linux' to 'Linux swap / Solaris' Partition 1 of type Linux and of size 511 MiB is set
We will create a new partition for our swap with n command Command (m for help): n You can type m command for the help which will list you different possibilities. Here I am going to use fdisk command to create a partition: # fdisk /dev/sdbĬhanges will remain in memory only, until you decide to write them. It means that there is no swap 2) Create a partition for swapĪs we saw we have enough unallocated space on the disk, we can create a new partition using tools like parted or fdisk.
How to create boot partition in linux verification#
We can also use the command below for verification # swapon -s You can see that we don't have a swap partition. Total used free shared buff/cache available Check the swap with free -m command we have: # free -m Sector size (logical/physical): 512 bytes / 512 bytes Check if you have enough space on disk to create a new partition for swap using fdisk or parted command.
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