If the SWAP (swap space) on your computer is not enough, as long as there is a space on our hard disk, we can use these remaining spaces, we can use the command directly: MKSWAP / DEV / HDA (assuming Linux drive is / DEV / HDA Check the size of SWAP with "free", Linux supports up to 16 swap partitions, each swap partitions up to 128M, and there is no big file to be established when there is no free partition. Here is a series of commands: #dd if = / dev / zero of = swapfile bs = 1024 count = 8192 #mkswap swapfile 8192 #Sync #Swapon swapfile