Virtual Memory Adjustment

Create a swap file

fallocate -l 4G /swapfile

Set permissions and initialize the swap header

chmod 600 /swapfile
mkswap /swapfile

Enable swap and verify status

swapon /swapfile
swapon --show
free -h

Create a systemd service to enable automatic mounting

tee /etc/systemd/system/enable-swapfile.service >/dev/null <<'EOF'
[Unit]
Description=Enable swapfile via swapon
After=local-fs.target
Requires=local-fs.target

[Service]
Type=oneshot
ExecStart=/sbin/swapon /swapfile
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target
EOF

Enable the service at boot

systemctl daemon-reload
systemctl enable enable-swapfile.service

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