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

1. net.ipv4.conf.default.rp_filter = 2
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