## 临时清理
```bash
> /var/log/journal/xxx/system.journal
```
## 自动维护
```bash
# 保留近1周日志
journalctl --vacuum-time=1w
# 保留500M日志
journalctl --vacuum-size=500M
```
注意: 若提示Error was encountered while opening journal files: Input/output error,则表明文件损坏，删除日志，并重启
```bash
systemctl restart systemd-journald.service
```