Linux script to collect system statistics and send to your email

This script can use to daily send the system statistics server. It will also reformat the output to replace tabs with 5 spaces so it will display nicely on your email client.

	#!/bin/bash
	SERVER="mydomain.com"
	EMAIL_TO="your_email@gmail.com"
	EMAIL_FROM="stats@mydomain.com"
	# logged in users and what are they running
	WHO=`w`
	# processor stats
	MPSTAT=`mpstat`
	# virtual memory stats
	VMSTAT=`vmstat`
	# Top 20 memory hog applications
	PS_MEM=`ps -A -o pid,pcpu,pmem,start_time,state,time,comm | perl -e '($_ = join "",<>) =~ s/(\t)/ /g; print;' |sort -g -k 3 -r | head -20`
	# Top 10 CPU usage applications
	PS_CPU=`ps -A -o pid,pcpu,pmem,start_time,state,time,comm | perl -e '($_ = join "",<>) =~ s/(\t)/ /g; print;' | sort -g -k 2 -r | head -10`
	# memory usage in MB
	FREE=`free -m`
	PROCINFO=`procinfo`
	# iptables status
	IPTABLES=`iptables -nL`
	# established connections
	NETSTAT=`netstat -na |grep -i esta |grep -v 127.0.0.1 |sort -n -t. -k2`
	# line divider
	DL="=================================================================================="
	FINAL="${DL}
	`date`
	${DL}
	${SERVER}
	${DL}
	${WHO}
	${DL}
	${FREE}
	${DL}
	${MPSTAT}
	${DL}
	${VMSTAT}
	${DL}
	${PROCINFO}
	${DL}
	Top 10 CPU processes
	${PS_CPU}
	${DL}
	Top 20 Memory processes
	${PS_MEM}
	${DL}
	${IPTABLES}
	${DL}
	${NETSTAT}
	${DL}
	"
	echo "${FINAL}" |
	perl -e '($_ = join "",<>) =~ s/(\t)/ /g; print;' |
	sendEmail -f "${EMAIL_FROM}" -u "${SERVER} comparator" -t ${EMAIL_TO}

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