Ubuntu must remember to clean up the log in time

problem

When using the machine today, it prompts that the available space is insufficient.

Troubleshoot

# du -h --max-depth=1 /var/log/*
2.3G	/var/log/installer
4.0G	/var/log/journal/16402455fdc44373ac5324fa1256a4c2
4.0G	/var/log/journal
255G	/var/log/kern.log
224G	/var/log/syslog
32G	/var/log/syslog.1
3.9M	/var/log/sysstat
12K	/var/log/tallylog
76K	/var/log/unattended-upgrades
16K	/var/log/wtmp
其他省略

The culprit was traced to kern.log and syslog, and it recorded nearly 470G of logs. Admire! Record it and remember to clean it up later.