重启rsyslog服务时出现问题（误删/var/log/messages解决方案）

今天修改了/etc/rsyslog.conf中的内容后，想着要通过systemctl restart rsyslog重启服务，但是执行完命令后，总感觉/etc/rsyslog.conf中修改的内容没有生效。

于是乎就去看了下/var/log/messages下的日志文件，发现有这样一行提示：Mar 1 21:33:39 localhost rsyslogd-2027: imjournal: fscanf on state file `/var/lib/rsyslog/imjournal.state' failed

接着将这行提示放到网上搜索了一番终于找到一篇解答，地址如下：
http://unix.stackexchange.com/questions/124942/rsyslog-not-logging
注意到这篇有这样几行：

When this issue occurs, you can delete /var/lib/rsyslog/imjournal.state and restart the daemon as a workaround.

rsyslog doesn't handle the date directly but only through the systemd API. I've checked the code in imjournal a while ago and this looks like an issue in systemd.

意思是说把/var/lib/rsyslog/imjournal.state文件删掉，然后在执行systemctl restart rsyslog命令，这样/etc/rsyslog.conf修改的内容就会生效。

验证了下，还真的可以。