1 / 5

www_devopscheetah_com_how-to-create-a-swap-file-in-linux_

Swap space/partition is space on a disk created for use by the operating system when memory has been fully utilized. It can be used as virtual memory for the system; it can either be a partition or a file on a disk.

Atulr
Download Presentation

www_devopscheetah_com_how-to-create-a-swap-file-in-linux_

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DevOpsCheetah Home Linux Cloud  Programming  Monitoring  CI/CD  Categories  How to create a Swap file in Linux  May 26, 2021  Rahul Yadav  0 Comment Swap space/partition is space on a disk created for use by the operating system when memory has been fully utilized. It can be used as virtual memory for the system; it can either be a partition or a file on a disk. Swap space can take the form of either a dedicated swap partition or a swap file. In most cases, when running Linux on a virtual machine, a swap partition is not present, so the only option is to create a swap file Creating Swap partition in linux : You can use the following command to create the swap file: # sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576 Here bs=1024 means read and write up to 1024 bytes at a time We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent. Cookie Settings Accept All Also we can make use of fallocate command

  2. # fallocate –length 1GiB /swapfile Provide appropriate permission to file created so that only root user can access # chmod 600 /swapfile Now use the mkswap utility to set up the file as Linux swap area: # mkswap /swapfile Enable the swap using below command: # swapon /swapfile For making the change permanent vi the /etc/fstab file and append the following line # /swapfile swap swap defaults 0 0 meaning of each field: swapfile – device/file name swap – defines device mount point swap – specifies the file-system type

  3. defaults – describes the mount options 0 – specifies the option to be used by the dump program 0 – specifies the fsck command option How to check if the swap file was created using the swapon command or free command . # swapon -–show # free -h How to check and adjust the swappiness value Swappiness is a Linux kernel property that defines how often the system will use the swap space. Swappiness can have a value between 0 and 100.  Default value is 60 Use below command to check the value of swapniess # cat /proc/sys/vm/swappiness To set the swappiness value to 20, you would need run the following sysctl command:  # sysctl vm.swappiness=20

  4. To make this parameter persistent across reboots append the following line to the /etc/sysctl.conf file # vm.swappiness=20   Check : Ansible Ad-hoc Commands Tags: Linux swap file , Swap file in Linux , Swap file linux Leave a Reply Your email address will not be published. Required fields are marked * Comment Name * Email *

  5. Website Save my name, email, and website in this browser for the next time I comment. POST COMMENT  Previous Post Next Post  Related Posts    Blogs About Us Contact Us Privacy Policy © 2021. DevOpsCheetah.com PDFmyURL.com - convert URLs, web pages or even full websites to PDF online. Easy API for developers!

More Related