I was looking into adding a network card, and inadvertantly messed up my Ubuntu 14.04 running zimbra 8.7.10 I'm only using eth0 at present When I started: Code: dmesg | grep -i network would give the following result Code: [ 4.203179] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection [ 4.321572] e1000e 0000:03:00.0 eth1: Intel(R) PRO/1000 Network Connection And the command Code: cat /etc/network/interfaces |sed 's/#.*$//'|grep dns-|sed 's/dns-//g'|sudo resolvconf -a eth0.inet would bring the dns-nameserver to resolv.conf Now Code: dmesg | grep -i network gives no results and Code: cat /etc/network/interfaces |sed 's/#.*$//'|grep dns-|sed 's/dns-//g'|sudo resolvconf -a eth0.inet fails to work. After this happened, I found that the name server info was missing from resolv.conf and had to manually enter the dns namservers (it will probably get over-written as not supposed to edit this file directly) Also my Zimbra has not been working correctly ever since (not sure it is related) but accounts going into lockout randomly and frequently And SSH sessions getting dropped every once in a while and Zimbra admin panel gets dropped too. Here's what I might have done to cause this: When I was doing the dmesg | grep -i network command I was trying to cut and paste, and it tried to executed the commands. Not sure if it did. And I plugged a network wire into the empty network port and I lost connection knocking my server offline, so I rebooted Code: ifconfig (notice eth3) root@mail:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:1e:67:16:36:65 inet addr:71.184.68.19 Bcast:71.184.68.255 Mask:255.255.255.0 inet6 addr: fe80::21e:67ff:fe16:3665/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:36320856 errors:0 dropped:18330 overruns:0 frame:0 TX packets:71184839 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4007218395 (4.0 GB) TX bytes:101513088672 (101.5 GB) Interrupt:16 Memory:b2300000-b2320000 eth3 Link encap:Ethernet HWaddr 00:1e:67:16:36:64 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:16 Memory:b2100000-b2120000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:17723498 errors:0 dropped:0 overruns:0 frame:0 TX packets:17723498 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:16379871555 (16.3 GB) TX bytes:16379871555 (16.3 GB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:192.168.141.1 P-t-P:192.168.141.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
After disabling dnsmasq (based on howto) I found after reboots it was still running. Removed it and now everything back to normal.
