* Linux two NICs in the same subnet, but secondary doesn’t ping:

	- net.ipv4.conf.default.rp_filter = 2
	- net.ipv4.conf.all.rp_filter = 2

 * mkfs.xfs /dev/sdb1; u=`blkid  /dev/sdb1 | cut -d ' ' -f 2` ; echo "$u /data xfs defaults 0 0" >> /etc/fstab ; mkdir /data ; mount /data ; df -h