Monitoring

$ wall

# 매일 20시 (오후 8시)에 export_dump.sh라는 shell 프로그램 실행 0 20 * * * /home/oracle/scripts/export_dump.sh

*/10 * * * * bash /root/monitoring.sh | wall

$ uname -a

$ grep "physical id" /proc/cpuinfo | sort | uniq | wc -l

$ cat /proc/cpuinfo | grep processor | wc -l

$ free -m | grep Mem | awk '{printf "%d/%dMB (%.2f%%)\n", $3, $2, $3/$2 * 100.0}'

$ df -h | awk '$NF=="/"{printf "%d/%dGB (%s)\n", $3, $2, $5}'

$ top -bn1 | grep load | awk '{printf "%.2f%%\n", $(NF-2)}'

$ who | awk '{print $3" "$4}'

$ cat /proc/net/tcp | wc -l | awk '{print $1-1 " ESTABLISHED"}'

$ hostname -I | tr -d '\n''' && ip link | grep "ether " | awk '{print "("$2")"}'

$ cat /var/log/auth.log | grep -c 'COMMAND=' | tr -d '\n'