#sudo dd if=/dev/zero of=/swapspacefile bs=1M count=2048k  0+0 records in  0+0 records out  0 bytes (0 B) copied, 0.000417928 s, 0.0 kB/s#chmod 600 /swapspacefile   mkswap: error: swap area needs to be at least 40 KiB   Usage:     mkswap [options] device [size]   Options:     -c, --check               check bad blocks before creating the swap area     -f, --force               allow swap size area be larger than device     -p, --pagesize SIZE       specify page size in bytes     -L, --label LABEL         specify label     -v, --swapversion NUM     specify swap-space version number     -U, --uuid UUID           specify the uuid to use     -V, --version             output version information and exit     -h, --help                display this help and exit#sudo mkswap /swapspacefilebut it throws below when I excute the,   swapon: /swapfile: insecure permissions 0644, 0600 suggested.  swapon: /swapfile: read swap header failed: Invalid argument
swapon: /swapfile: read swap header failed: Invalid argument
linux