搬瓦工 Ubuntu 22.04 Fail2ban 没安装/无法启动 解决方案

最近新买了个搬瓦工服务器，用控制面板装了Ubuntu 22.04 LTS，默认的是精简版本，没觉得没什么问题省点硬盘挺好的，差点什么我自己装上就好了。

我首先开始安装fail2ban，但是直接人傻了，装了上去之后启动不来，一直提示

Failed during configuration: Have not found any log file for sshd jail

我还以为是搬瓦工改了默认配置把sshd的log放在了不同的地方，因为搬瓦工默认是改ssh端口+给你个随机密码的

但是看了半天没看到他重新改到了哪里.....

最后才发现是Minimized ubuntu根本就没log文件....只活在journalctl里....

你得自己去安装个软件包才有....

解决方案: sudo apt-get install rsyslog 或者 unminimize

I got bitten by this when I tried to configure fail2ban on a "minimal" Ubuntu 20.04 LTS image. On Ubuntu fail2ban looks for authentication events in /var/log/auth.log. However, in the "minimal" image only the systemd "journal" facility is available, the file auth.log is missing and then fail2ban won't start. To get the good old log files back, I installed rsyslog:

sudo apt-get install rsyslog

and then fail2ban started working properly.

Credit where credit is due: the idea for this solution came from @Bloodden 's answer which seems to be somewhat unfairly voted down...

https://unix.stackexchange.com/questions/108241/debian-auth-log-missing-from-var-log