Can you boot a live cd on the server? If you can, do so and test the network for both outgoing (ping, telnet or ssh) and incoming (pinged by another machine) connections.
Sent from my iPod On Sep 15, 2011, at 6:32 PM, AL Pelias <[email protected]> wrote: > Hi Sir, > > My NIC is working fine because when I try to choose the grub option > ubuntu, linux 2.6.31-14-generic-pae (on /dev/sda5) > I can ping users in LAN but I can not restart network and ssh. > > but if choose the option > ubuntu, linux 2.6.31-14-generic-pae > thats the time the network is down even when I try to up the network > doesn't goes up. > > > my GRUB options: > > ubuntu, linux 2.6.31-14-generic-pae > ubuntu, linux 2.6.31-14-generic-pae (recovery mode) > memory test (memtest 86+) > memory test (memtest 86+, serial console 115200) > ubuntu, linux 2.6.31-14-generic-pae (on /dev/sda5) > ubuntu, linux 2.6.31-14-generic-pae (on /dev/sda5) (recovery mode on > /dev/sda5) > > > What do you think sir? > > Thanks, > AL > > On 9/14/2011 6:51 PM, fooler mail wrote: >> hi al, >> >> as what i said below.. you have two problems... >> >> fix your network interface card problem first... when it is not in >> RUNNING state.. a strong indication that your nic link state is not >> up... if it is not up or not in running state.. it wont accept any >> traffic from any hosts... >> >> here is what you gonna do for a simple test... >> >> 1. get a working crossover cable >> 2. connect one end of that crossover cable to your laptop or pc and >> assign an IP address 192.168.0.1 with a netmask 255.255.255.0.. just >> ignore gateway, dns and other settings.. >> 3. connect the other end of that crossover cable to your server eth1 >> interface card.. make sure you know which one is eth1 as i assume you >> have multiple nics in your server.. if you are not sure.. just try to >> insert one at a time to all those nic ports until you see RUNNING >> state in eth1... if you cant see running state.. then you have a >> broken nic.. >> 4. if it is in running state... inside your server.. with (or without) >> firewall rules.... just remove or flush that firewall table by running >> this command "iptables -F" in root >> 5. in your laptop/pc... ping your server... ping 192.168.0.2 >> >> at this point.. i assume you will get a reply.... run your ssh server >> >> root# service ssh stop >> root# service ssh start >> >> from your laptop/pc... ssh 192.168.0.2 (use IP not FQDN) >> >> the rest.. you know what to do to fix your problem... >> >> >> fooler. >> >> On Wed, Sep 14, 2011 at 5:05 PM, AL Pelias<[email protected]> wrote: >>> Hi Sir, >>> >>> whats the status of my instruction? >>> >>> all services are down even when I try to start ssh manually it goes up >>> but still cant use it because of the network is down but when I start >>> the network I received the message: >>> >>> the script you are attempting to invoke has been converted to an upstart >>> job. >>> >>> FYI. >>> >>> Thanks, >>> AL >>> >>> >>> On 9/14/2011 10:39 AM, fooler mail wrote: >>>> whats the status of my instruction? >>>> >>>> fooler. >>>> >>>> On Sat, Sep 10, 2011 at 7:48 AM, fooler mail<[email protected]> >>>> wrote: >>>>> On Fri, Sep 9, 2011 at 3:20 PM, AL Pelias<[email protected]> >>>>> wrote: >>>>>> Hi Sir, >>>>>> >>>>>> run the following at root prompt: >>>>>> >>>>>> 1. runlevel >>>>>> N 2 >>>>>> >>>>>> 2. ifconfig >>>>>> Pls see attached:ifconfig.jpg >>>>>> >>>>>> 3. netstat -ln >>>>>> Pls see attached:netstat_ln.jpg >>>>>> >>>>>> 4. netstat -rn >>>>>> pls see attached:netstat_rn.jpg >>>>>> >>>>>> >>>>>> sorry for the blurred jpg files. >>>>> dont worry it needs a 3D glass to see it clearly :-> >>>>> >>>>> runlevel is 2 which is normal to ubuntu server... >>>>> >>>>> netstat -rn looks good while its default gateway is 192.168.0.4.. >>>>> >>>>> ifconfig shows that your eth1 is up with an ip adddress of 192.168.0.2 >>>>> and netmask of 255.255.255.0.. >>>>> >>>>> netstat -ln shows that no processes are listening to any TCP ports.. >>>>> thats include your ssh tcp port 22... >>>>> >>>>> you have two problems here... >>>>> >>>>> 1. eventhough your eth1 is "UP" but it is not in "RUNNING" state... as >>>>> you can see in your ifconfig output.. lo0 is only UP and RUNNING... >>>>> if an interface is not in running state.. it wont accept any data... >>>>> check your cable for any breakage and reinsert both sides (network >>>>> card and switch port) to tighten up... >>>>> >>>>> after that make sure your eth1's state look like this: >>>>> >>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 >>>>> >>>>> 2. your ssh (and other services) didnt come up after boot.. even if >>>>> your eth1 is not in running state as long as it is in UP state... ssh >>>>> will bind to eth1 interface as well as to loopback interface (as >>>>> loopback interface is always on all the time and assuming ssh is bind >>>>> to any interface).. >>>>> >>>>> check your service status and look for ssh if it is mark as run during >>>>> boot up... >>>>> >>>>> root# service --status-all >>>>> >>>>> you can manually run it... >>>>> >>>>> root# service ssh start >>>>> >>>>> for more info running a service.... >>>>> >>>>> https://help.ubuntu.com/community/UbuntuBootupHowto >>>>> >>>>> fooler. >>>>> >>>> _________________________________________________ >>>> Philippine Linux Users' Group (PLUG) Mailing List >>>> http://lists.linux.org.ph/mailman/listinfo/plug >>>> Searchable Archives: http://archives.free.net.ph >>>> >>> _________________________________________________ >>> Philippine Linux Users' Group (PLUG) Mailing List >>> http://lists.linux.org.ph/mailman/listinfo/plug >>> Searchable Archives: http://archives.free.net.ph >>> >> _________________________________________________ >> Philippine Linux Users' Group (PLUG) Mailing List >> http://lists.linux.org.ph/mailman/listinfo/plug >> Searchable Archives: http://archives.free.net.ph >> > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > http://lists.linux.org.ph/mailman/listinfo/plug > Searchable Archives: http://archives.free.net.ph _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List http://lists.linux.org.ph/mailman/listinfo/plug Searchable Archives: http://archives.free.net.ph
