$ yum install -y multitail
$ alias mtail='multitail'
## -l: 监控命令
$ multitail -l "ping baidu.com"
## -i: 监控文件
$ multitail -i /var/log/nginx/access.log -i /var/log/nginx/error.log
## -e: 关键字筛选
$ multitail -e "Error" /var/log/eos/mgm/xrd.log.mgm /var/log/ceph/*.log
## -a: 将输出同时复制到文件中
$ multitail -a out.log -e "Error" /var/log/eos/mgm/xrd.log.mgm
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