Use the below steps to create and enable Swap memory on your Debian 11 system via command line.
First of all, Check that no Swap memory is enabled on your system. You can see the swap memory details by running the following commands.
sudo swapon -s
Now, create a file to use as swap in your system system. Make sure you have enough free disk available to create new file. Also keep the swap just up to 2x of the memory on your system.
My Debian system have 2GB of main memory. So we will create a swapfile of 4GB in size.
sudo fallocate -l 4G /swapfile
chmod 600 /swapfile
Now use the mkswap command to convert file to use for swap memory.
sudo mkswap /swapfile
Then activate the swap memory on your system.
sudo swapon /swapfile
You have successfully added swap memory to your system. Execute one of the below commands to view current active swap memory on your system:
sudo swapon -s
Make Swap Permanent
After running above commands, Swap memory is added to your system and operating system can use when required. But after reboot of system swap will deactivate again.
You can make it permanent by appending the following entry in /etc/fstab file. Edit fstab file in editor:
and add below entry to end of file:
/swapfile none swap sw 0 0
Add swap in fatab
Save file and close. Now Swap memory will remain activate after system reboots.
Now change the swappiness kernel parameter as per your requirement. It tells the system how often system utilize this swap area.
Edit /etc/sysctl.conf file:
sudo nano /etc/sysctl.conf
append following configuration to end of file
Now reload the sysctl configuration file
sudo sysctl -p
Now the operating system can use swap memory in case of low physical memory. In this tutorial, you have learned to create and enable Swap memory on Debian 11 Linux system.
Ако ви се е повредил Windows, не знаете какво да правите с Linux или не знаете как се правят аквариуми - това е мястото за вас
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