make-swapfile

tools/make-swapfile.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -exo pipefail
+
+# https://www.linode.com/docs/guides/how-to-increase-swap-space-in-ubuntu/
+# https://help.ubuntu.com/community/SwapFaq
+
+sudo swapon --show
+free -h
+df -h
+
+if [ -f /swapfile ]; then
+    set +x
+    echo "Already exists"
+    exit 1
+fi;
+
+sudo fallocate -l 1G /swapfile
+sudo chmod 600 /swapfile
+sudo mkswap /swapfile
+sudo swapon /swapfile
+
+sudo swapon --show
+free -h
+df -h
+
+sudo cp /etc/fstab /etc/fstab.bak
+echo "/swapfile       swap            swap    defaults          0     0" | sudo tee -a /etc/fstab
+sudo sysctl vm.swappiness=50
+echo "vm.swappiness=50" | sudo tee -a /etc/fstab
+
+sudo swapon --show