Add:genswap.sh

Former-commit-id: d090e14af6b5d2b571f0deae23532b4f02c04773

genswap.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+SWAPPATH=~/
+SWAPNAME="swapfile"
+TOTALRAM=$(free -m | gawk  '/Mem:/{print $2}')
+VERSION="0.1.0"
+BUILDDATE="2018-06-05"
+
+
+function autoSwap(){
+        echo -e "\nTotal Physical RAM is: ${TOTALRAM} MB\n"
+        echo -e "\nCreating a ${TOTALRAM} MB file in:${SWAPPATH}..\n"
+        echo -e "Enter to Accept | Ctrl+c to cancel\n"
+        read
+
+        echo -e "\nCreating file in ${SWAPPATH}...\n"
+        sudo fallocate -l ${TOTALRAM}M ${SWAPPATH}${SWAPNAME}
+        ls -lh ${SWAPPATH}${SWAPNAME}
+
+        sleep 1
+
+        echo -e "\nSetting permission of ${SWAPPATH}${SWAPNAME} to 600...\n"
+        sudo chmod 600 ${SWAPPATH}${SWAPNAME}
+        ls -lh ${SWAPPATH}${SWAPNAME}
+
+        sleep 1
+        
+        echo -e -n "\nDo you want to mark ${SWAPPATH}${SWAPNAME} as swap?(Y/n): "
+        read markswap
+
+        if [ "${markswap}" = "n" ];then
+            exit 0
+        fi
+
+        echo -e "\nMarking ${SWAPPATH}${SWAPNAME} as swap...\n\n"
+        sudo mkswap ${SWAPPATH}${SWAPNAME}
+
+        echo -e -n "\nDo you want to add swapfile to fstab?(Y/n): "
+        read addfstab
+
+        if [ "${addfstab}" = "n" ];then
+            exit 0
+        fi
+
+        echo -e "\nCreating backup of /etc/fstab ...\n"
+        sudo cp /etc/fstab /etc/fstab.bak
+
+        echo -e "Adding ${SWAPPATH}${SWAPNAME} to /etc/fstab ..\n"
+        echo "${SWAPPATH}${SWAPNAME} none swap sw 0 0" | sudo tee -a /etc/fstab
+}
+
+
+function help(){
+    echo -e "\nUsage: $0 [-a] [--auto] [-m] [--manual] <path>\n\n"
+    echo -e "-a | --auto        Automatically create and size swapfile based on physical memory\n"
+    echo -e "-m | --manual      Manually create and size swapfile based on user input\n"
+}
+
+function version(){
+    echo -e "Version ${VERSION}, built: ${BUILDDATE}\n"
+}
+
+case "${1}" in
+
+    -a|--auto)
+        autoSwap
+    ;;
+
+    -v|version|--version)
+        version
+    ;;
+
+    *)
+        help
+    ;;
+esac