[linux]_check_nproc

#!/bin/bash
#
# Purpose: Check how many Nproc running on system and send alert if reach treshold
# Author: Hendrawan

# Variable
HOST=`hostname`
TRESHOLD=40
FROM="NPROC_ALERT@example.com"
SENDTO="sysadmin@example.com"
max_pid=$(cat /proc/sys/kernel/pid_max)
cur_pid=$(ps -eLf | wc -l)

PERCENTAGE=`echo "100 * $cur_pid / $max_pid" | bc`

body_mail(){
        echo "Number of proccess reach $PERCENTAGE% on $HOST, please check.." >> /tmp/messages
        echo "Current proccess: $cur_pid "  >> /tmp/messages
        echo "Maximum proccess: $max_pid" >> /tmp/messages
        echo "" >> /tmp/messages
        echo "Nproc Users" >> /tmp/messages
        echo "---------------" >> /tmp/messages
        /bin/ps -eLf | awk '{print $1}' | sort -r | uniq -c | sort -rn | head -10 >> /tmp/messages
}

if [ "$PERCENTAGE" -gt "$TRESHOLD" ]; then
        body_mail
        /bin/ps -eLf >> /tmp/ps-`date +%d%m%Y-%H%M`.txt
        /bin/date >> /tmp/ps.txt
        echo "++ Reach Treshold ++" >> /tmp/ps.txt
        echo "Current proccess: $cur_pid " >> /tmp/ps.txt
        echo "Percentage proccess: $PERCENTAGE %" >> /tmp/ps.txt
        cat /tmp/messages | /bin/mailx -s "NPROC Alert Monitor at `hostname`" $SENDTO -- -f $FROM
        echo "" > /tmp/messages
else
        exit 1
fi