1.检查路由
route add default gw 192.168.73.1 dev eth0
2.nsswitch配置
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
#
passwd: db files
group: db files
shadow: db files
gshadow: files
hosts: files dns
networks: files dns
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: db files
存在/etc/hosts,/etc/resolv.conf,/etc/nsswitch.conf
/lib下也有/lib/libnss_dns*, /lib/libnss_files*, and /lib/libresolv*
LIBC NSS
When used with glibc, the BusyBox 'networking' applets will similarly require that you install at least some of the glibc NSS stuff (in particular, /etc/nsswitch.conf, /lib/libnss_dns*, /lib/libnss_files*, and /lib/libresolv*).
重新编译busybox,采用动态链接方式