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System

Logging every shell command to elastic stack
Elastic stack zabbix 연동
CentOS LVM (Logical Volume Manager) basic management
TCP Keepalive 를 통한 연결 유지
Time_Wait 원인과 tcp_tw_reuse 활용
tshark 를 통한 MySQL 쿼리 확인
Strace (linux trace system calls and signals)
postgresql93+Postgis install from CentOS6
Centos NIC ring buffer size 조절
Fluentd output for kafka
Fluentd Overview/ Default install
Kafka Default install test