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Cannot ping localhost after a half day of uptime

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http://askubuntu.com – This just started like 4 or 5 days ago. I'm running Ubuntu 12.04 desktop, and after about 12 hours of uptime it seems the loopback device just stops working. If I do an ifconfig, it looks like it's still there, but if I ping localhost or 127.0.0.1, both fail. Also, pinging known DNS addresses (www.google.com) fail. But pinging by IP works fine. The rest of the networking features seem unphased. I can still reach the Samba share from my Windows machine. Also, I run an Apache server that is still reachable from the outside world. Looking at the resources monitor, the CPU and memory usage appear ()

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Submitted by funckax on 08/06/2012

Stories similar to Cannot ping localhost after a half day of uptime

This SF Answer helped me after nerve's answer below:

No network loopback device after security update ubuntu 12.04

Original Question

I've been Google-ing and banging my head against the wall for a couple of hours on this one.

The server can ping all outside address (Google.com, Yahoo.com, Microsoft.com, etc). The server can't ping itself (127.0.0.1 or any static IP address on this machine) I

After my upgrade to 12.10, DNS resolution seems to fail for both local and external addresses. I can successfully ping local and external IP addresses (google.com, at least), but pinging DNS names immediately returns ping: unknown host <hostname>.

I'm having problems with my server. The server info is below. The problem I'm having it just started a few days ago after a server restart. I use in my php code

@get_headers($url);

I'm also using Google recaptcha. The problem I'm having is when my server outbound connections run real slow. I don't timeout it just takes about 10 seconds to get a header request or to connect to google recaptcha.

I've use bridging to connect my box with real network. In Vagrantfile:

config.vm.network :bridged

Then when I ssh to box and try ping any host (e.g.: google.com) then it's pinging but very slow. Resolving host took it ~20sec then each ping is about ~10sec. Briging works only with wlan0 (network is unrichable for eth0). Can it be problem with wifi card? Pinging from my laptop works fine.

Hello,

I am running FC14 on a machine in a home network. The FC14 machine is connected to a Billion 7300N router/gateway via Ethernet. It receives internet perfectly fine and can ping any other machine on the network. However, I can not ping/tracert/ssh the FC14 machine from any device on the network (including phones, I've tried everything).

Hi,

I am using FC9 and internet is working fine on it. Well, I ping to google, it is resolving but if I ping by hostname to other LAN computers. it gives error : unknown host. but if i ping with IP address it is pinging.

NOTE : 1) My firewall is acting as a dns server and other windows systems are resolving it.

I have set up Xen + Ubuntu per the instructions at https://help.ubuntu.com/community/XenProposed. I am now ready to install a HVM guest OS (Ubuntu Desktop 12.04). After I start my HVM guest OS

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I need to now connect to it. I am connecting to the HVM guest OS on a Windows box using VNC Viewer.

I am looking into a weird problem for some of the users (including me!) on my network.

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During this time, other services remain active. The connection never actually drops out.

Unable to ping localhost 21 weeks 4 days ago

Hi all,

I have gone through many posts related to this issue,but my issue wasn't resolved hence creating new thread.

I am unable to ping localhost.

Code: ping localhost tries to ping localhost which is defined in DNS.

My /etc/hosts has entry for localhost as

Code: 127.0.0.1 loopback localhost .

My /etc/netsvc.conf has Code: hosts = local, bind .

Still i am n