restored legacy free command so older distros can use it if numfmt is unavailable

lgsm/functions/info_distro.sh

@@ -91,6 +91,12 @@ load=$(uptime|awk -F 'load average: ' '{ print $2 }')
 
 ## Memory information
 
+
+## Memory information
+# Available RAM and swap.
+
+# Newer distros can use numfmt to give more accurate results
+if [ -n "$(command -v numfmt 2>/dev/null)" ]; then
 	# Issue #2005 - Kernel 3.14+ contains MemAvailable which should be used. All others will be calculated
 
 	# get the raw KB values of these fields
@@ -118,6 +124,32 @@ physmemcached=$(numfmt --to=iec --from=iec --suffix=B "$((${physmemcachedkb}+${p
 	swaptotal=$(numfmt --to=iec --from=iec --suffix=B "$(grep ^SwapTotal /proc/meminfo | awk '{print $2}')K")
 	swapfree=$(numfmt --to=iec --from=iec --suffix=B "$(grep ^SwapFree /proc/meminfo | awk '{print $2}')K")
 	swapused=$(numfmt --to=iec --from=iec --suffix=B "$(($(grep ^SwapTotal /proc/meminfo | awk '{print $2}')-$(grep ^SwapFree /proc/meminfo | awk '{print $2}')))K")
+else
+# Older distros will need to use free.
+	# Older versions of free do not support -h option.
+	if [ "$(free -h > /dev/null 2>&1; echo $?)" -ne "0" ]; then
+		humanreadable="-m"
+	else
+		humanreadable="-h"
+	fi
+	physmemtotalmb=$(free -m | awk '/Mem:/ {print $2}')
+	physmemtotal=$(free ${humanreadable} | awk '/Mem:/ {print $2}')
+	physmemfree=$(free ${humanreadable} | awk '/Mem:/ {print $4}')
+	physmemused=$(free ${humanreadable} | awk '/Mem:/ {print $3}')
+
+	oldfree=$(free ${humanreadable} | awk '/cache:/')
+	if [ -n "${oldfree}" ]; then
+		physmemavailable="n/a"
+		physmemcached="n/a"
+	else
+		physmemavailable=$(free ${humanreadable} | awk '/Mem:/ {print $7}')
+		physmemcached=$(free ${humanreadable} | awk '/Mem:/ {print $6}')
+	fi
+
+	swaptotal=$(free ${humanreadable} | awk '/Swap:/ {print $2}')
+	swapused=$(free ${humanreadable} | awk '/Swap:/ {print $3}')
+	swapfree=$(free ${humanreadable} | awk '/Swap:/ {print $4}')
+fi
 
 ### Disk information