There were many ufw block logs in syslog, ufw.log and messages under /var/log/ ,like as Apr 15 16:29:05 raspberrypi kernel: [2831949.081700] [UFW BLOCK] IN=wlan0 OUT= MAC=xxxxxxxxxxxxxxxx SRC=IP address of router DST=224.0.0.1 LEN=28 TOS=0x00 PREC=0xC0 TTL=1 ID=28502 PROTO=2
Work around: $ sudo ufw allow in from ‘IP address of router’ to 224.0.0.1 or $ sudo ufw block in from ‘IP address of router’ to 224.0.0.1
Another garbage was like as Apr 15 16:41:44 raspberrypi rsyslogd-2007: action ‘action 18’ suspended, next retry bla bla bla
Work around: $ sudo nano /etc/rsyslog.conf
Comment out of rear part such as #daemon.;mail.;\ #news.err;\ #.=debug;.=info;\ #.=notice;.=warn |/dev/xconsole
課題・プロセス分析のための９つの質問 Nine(9) magic questions of process analysis for improvement This questions worked well in most cases.
Q1. それは何故か？ What is the reason ? Q2. そうなっているか、どうしたらわかるか By what can you judge the state ? Q3. それが満たされたら、出来るのか If it will be satisfied, the problem will be cleared ? Q4. どうすれば良いか If no, what else should be done ? Q5. あてはめてみてうまく行くか If you allocate it to the issue, will the problem be cleared. Q6. うまく回っていることをどう管理するか How do you manage the well performed cycle ? Q7. それだとなぜ困るか Why is it problem ? Q8. それはどこに問題があるか Where is the cause of problem ? Q9. それはどう関係するのか How does it relate to the problem ?