/var/log/nginx/access.log，错误日志 /var/log/nginx/error.log。/var/log/php-fpm/error.log。/var/log/mysql/slow.log（需先在配置文件中开启）。/var/log/messages 或 /var/log/syslog。cat、less、tail -f（实时查看）。grep 'error' /var/log/nginx/error.log。awk '{print $1}' /var/log/nginx/access.log | sort | uniq -c | sort -nr | head -10。awk '{print $9}' /var/log/nginx/access.log | sort | uniq -c | sort -nr。jq工具提取字段，如jq -r '.status' /var/log/nginx/access.log。yum install -y goaccess
goaccess /var/log/nginx/access.log --log-format=COMBINED -o report.html
logrotate定期压缩旧日志，避免占用磁盘空间。
