How to enable swap in ubuntu and debian?Sep 14, 2019 · 1 min
What is swap space?
Swap space in any operating system is amount of disk space reserve for moving inactive pages from RAM. Swap space are of two type dedicate swap or of swap files in linux OS. Here we will create a swap file for the linux system.
We assume that the system does have not swap partition for this guide.
Check if your system already exist swap partition.
Open the terminal, and enter the following command to check.
Check free memory and disk.
free h //or df -h
If you have sufficient space in you hard-disk then lets continue.
Step:1 Make swap off
Step 2: Resize the swapfile
Here let us increase to 2GB (assuming existing one has 1GB space as given in the article)
dd if=/dev/zero of=/var/swapfile bs=1024k count=2000
Step 3: Make swapfile usable
Step 4: Make swapon
Step 5: Change permission to 0600
chmod 0600 /var/swapfile
Step 6: Verify the swapfile
Step 7: Make swap file permanent
echo '/var/swapfile none swap sw 0 0' | tee -a /etc/fstab