我在解析 VMWare 上运行的 Debian 上的主机名时遇到问题。
它突然停止工作了。卸载 percona 服务器并删除 /etc/mysql.conf 之后的某个地方最初，当来宾运行时主机处于睡眠状态时，它认为这是网络问题，这是 VMWare 的一个已知问题。但不可能。
Debian 7.4，已安装 VMWare 工具
/etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8
nameserver 8.8.4.4
ping、dig 和 nslookup 输出
ivar@debian:~$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_req=1 ttl=47 time=40.0 ms
64 bytes from 8.8.8.8: icmp_req=2 ttl=47 time=39.7 ms
^C
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 39.747/39.874/40.001/0.127 ms
ivar@debian:~$ dig google.com
; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18895
;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;google.com. IN A
;; ANSWER SECTION:
google.com. 299 IN A 173.194.113.100
google.com. 299 IN A 173.194.113.99
google.com. 299 IN A 173.194.113.96
google.com. 299 IN A 173.194.113.103
google.com. 299 IN A 173.194.113.110
google.com. 299 IN A 173.194.113.102
google.com. 299 IN A 173.194.113.98
google.com. 299 IN A 173.194.113.105
google.com. 299 IN A 173.194.113.97
google.com. 299 IN A 173.194.113.101
google.com. 299 IN A 173.194.113.104
;; Query time: 43 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Sat Mar 29 18:46:07 2014
;; MSG SIZE rcvd: 204
ivar@debian:~$ nslookup google.com
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
Name: google.com
Address: 173.194.113.97
Name: google.com
Address: 173.194.113.104
Name: google.com
Address: 173.194.113.101
Name: google.com
Address: 173.194.113.99
Name: google.com
Address: 173.194.113.100
Name: google.com
Address: 173.194.113.96
Name: google.com
Address: 173.194.113.102
Name: google.com
Address: 173.194.113.103
Name: google.com
Address: 173.194.113.110
Name: google.com
Address: 173.194.113.105
Name: google.com
Address: 173.194.113.98
ivar@debian:~$ ping google.com
ping: unknown host google.com
有什么想法如何解决这个问题吗？
/etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.
passwd: compat
group: compat
shadow: compat
hosts: files mdns4_minimal wins [NOTFOUND=return] dns mdns4
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
答案1
对于您当前的nsswitch.confdns，只有在请求wins失败时才会请求。以下是nsswitch.conf我系统上的联机帮助页的相关摘录：
notfound
查找成功，但未找到请求的条目。此条件的默认操作是“继续”。return
立即返回结果。不要调用任何进一步的查找函数。
在您的示例中，您成功查询了 WINS，但没有检索到 的结果google.com。要解决此问题，您可以删除[NOTFOUND=return]或重新排序为主机查找而查询的服务。这是一个修复示例：
hosts: files mdns4_minimal dns wins [NOTFOUND=return] mdns4