查看是否安装了rsyslog

systemctl status rsyslog

ubuntu24.04 rsyslog 日志保存180天配置

• vi /etc/logrotate.d/rsyslog

/var/log/syslog
/var/log/mail.log
.....
{
    rotate 180  #修改
    daily       #修改
    missingok
    .....
}