더미파일 생성
$dd if=/dev/zero of=/root/swapfile bs=1024 count=2000000
1580109+0 records in
1580109+0 records out
1618031616 bytes (1.6 GB) copied, 23.3556 s, 69.3 MB/s
```bash
생성된 파일 확인
```bash
$ll /root/swapfile
total 1580112
-rw-r--r-- 1 root root 1618031616 Sep 7 20:24 swapfile
```bash
swapfile 에 권한 생성
```bash
$chmod 600 /root/swapfile
```bash
swap 생성
```bash
$mkswap /root/swapfile
Setting up swapspace version 1, size = 1.5 GiB (1618026496 bytes)
no label, UUID=89d2f092-7fee-4fa2-854a-77a914e79367
```bash
swap 마운트
```bash
$swapon /root/swapfile
$free -m
total used free shared buff/cache available
Mem: 983 136 75 18 771 669
Swap: 1543 0 1543
```bash
swap 자동 마운트 rc.local 하단에 추가
```bash
$vi /etc/rc.local
swapon /root/swapfile
```bash