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c++中string型別的長度

查詢當前目錄 log 檔案 中含有 關鍵字的 檔案

find . -name "*.log" | xargs grep "keywork"

nginx 日誌

http{
  log_format apm '[$time_local]\tclient=$remote_addr\t'
               'request="$request"\t request_length=$request_length\t'
               'http_referer="$http_referer"\t'
               'bytes_sent=$bytes_sent\t'
               'body_bytes_sent=$body_bytes_sent\t'
               #'user_agent="$http_user_agent"\t'
               'upstream_addr=$upstream_addr\t'
               'upstream_status=$upstream_status\t'
               #'cookie="$http_cookie"\t'
               #'request_body="$request_body"\t'
               'document_root="$document_root"\t'
               'fastcgi_script_name="$fastcgi_script_name"\t'
               'request_filename="$request_filename"\t'
               'request_time=$request_time\t'
               'upstream_response_time=$upstream_response_time\t'
               'upstream_connect_time=$upstream_connect_time\t'
               'upstream_header_time=$upstream_header_time\t';
    access_log  /opt/logs/nginx/access.log  apm;
}