Ubuntu :: Computer Will Not Boot After Changing Host Name
Mar 16, 2011
I'm very new to Ubuntu and installed it (10.10) just a few days ago on a laptop I got for my girlfriend. The problem is that she wanted me to change the username and computer name that I have set up when installing, which I tried to do. I followed the instructions on this link to change the computer name/hostname: [URL]. Obviously I did something terribly wrong, because after trying to restart my computer I couldn't boot it. It freezes immediately after the BIOS screen - just displays a blinking dash in the top left corner. The same thing happens when i try to boot from a CD (I tried both Ubuntu and Windows 7 CD's. Resetting BIOS to default also did nothing.
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Aug 18, 2010
I set up a dhcp server in the lan and assigned static ips to two computers, computer A and B, according to their mac address. Everything was running fine. But when I turned off computer A, connected computer C to the network, and assigned computer A's static ip to computer C without changing dhcp setting. Computer C was able to access the internet. When I turned on computer A, dhcp couldn't assign an ip address to it, and computer C showed an error message of ip conflict and failed to use internet. I wonder if dhcp server is able to prevent other computer from using the same static ip that is already assigned to a computer according to its mac address.
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Jun 22, 2011
I'm building a replacement service, and in the not to distant future, I'll need to change the host name and IPs (ipv4) (I'll also be doing this on the fedora 10 box I'm replacing)
I can look around and edit a bunch of files to make it happen, but there has to be an easier way.
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Oct 30, 2010
I have an Asterisk on an externally hosted vServer with Lenny. In order to further protect the SSH access I intended to change the Port number 22 to something like 55555. For this I changed the /etc/ssh/sshd_config file and restarted ssh. This caused unfortunately the following problems:
(1) The first login works but DenyHost writes now the IP in its list so that the second login with the same IP is blocked.
(2) With RESET_ON_SUCCESS = yes several logins were possible with the same IP, but later it also was blocked for some still unknown reasons.
(3) Files can be uploaded for being edited, but they can't always be saved. When they can't be saved the next login with this IP is blocked. It thus looks like the blocking can occur while being connected. When the files can't be saved it is however still possible to copy files from the computer to the vServer.
I add below the entries in the auth.log from a logout and a login. It shows further how suddenly the attempts to save files were blocked. After this session the IP used for it was blocked. I don't know where the message "Unable to open env file: /etc/default/locale" comes from. If I remember right I had these messages already before. I don't know how much that is really important.
[Code]....
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Apr 29, 2010
I just installed Ubuntu 10.04 today, and during installation, a box came up asking stuff about the name of the network and things like that. I'm on school internet, so it came up as the name, so I just let it be the default. Well, it turns out, this was for the computer name.I was wondering if there was any way I can change the computer name after installation?f I'm not being clear, here's what it says at the terminal:Code:zac@dhcp-presidents-87:~$The dhcp-presidents-87 is what I want changed. I want it to be my name "Zac", and not the network name.
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Apr 11, 2010
I have 3 computers on a local home network. Computer 1 is not receiving incoming anything from other computers on the network, and I don't know why. The regular internet works fine. Computer 1 can ping and ssh into either 2 or 3. 2 can ping and ssh into 3 and vice versa. But nothing can ping OR ssh into 1. Trying to do so says "no route to host". All computers are running Ubuntu Karmic. I don't even know where to start figuring out what's causing this, but it's probably something simple. I'm using the IPs I found listed in my wireless router's web-based control panel.
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Dec 7, 2010
I have a wubi install on my windows 7 partition. Every time I try to change my theme in ubuntu 10.04 my computer freezes.
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Apr 11, 2010
I have 3 computers on a local home network. Computer 1 is not receiving incoming anything from other computers on the network, and I don't know why. The regular internet works fine.
Computer 1 can ping and ssh into either 2 or 3. 2 can ping and ssh into 3 and vice versa. But nothing can ping OR ssh into 1. Trying to do so says "no route to host".
All computers are running Ubuntu Karmic.
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Feb 15, 2010
RedhatEL5(as guest) in Vmware ace, installed Samba, when:
#links http://localhost:901 ENTER
It works
but not with
#links http://127.0.0.1:901 ENTER
hence can't connect remotely from XP(host Computer).
Restarted accordingly, xinetd, with IPtables stop, #/etc/xinetd.d/swat file(disable = no) etc. How to fix this?
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Apr 4, 2010
I am having trouble changing the resolution in my Computer,I am new to Linux and somehow, Lucky, I got this program to install, I installed it on a Dell PowerEdge 1850 with a Radeon 7000 Video card,I had another one set-Up before which gave me a resolution of 1400 x xxxxx? Was great, this one only offers 800 x 600 and some other very low resolutions, The programing allows me to change it and demands I log out, Restart x and log in again, took me a day to figure out what was "x" and how to restart it, but no response. Still the same.
In reading the Forums I see this command allot "/sbin/lspci -m" But, too bad, nobody tells exactly where to type that series of digits to get any response,
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Feb 26, 2010
I'm having trouble with Webmin. I got it up and running. However, I was changing the 'listen on port' to something other than port# 10000. I made sure ufw was open to the tcp requests on my new webmin port only. UDP has been disabled. I type in my browser my ip address with the new port, and I get 'problem loading page' now. How can I see the tcp port webmin is set from a terminal on the host computer? Do I goto a webmin folder and change a .conf file?
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Oct 23, 2010
When trying to connect to another Ubuntu machine running remote desktop using vinagre, I get a black screen on the client machine. Annoyed, I went upstairs to check the host machine, and it is waiting for me to authenticate my keyring. Why would the host need to authenticate for me to access it remotely?
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Nov 16, 2010
Could you tell me what two IP addresses could never be assigned to any host computer?
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Sep 19, 2010
i want to know, how create softlink in client (host) computer.
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Apr 18, 2010
I am trying to streamline my boot screen/GRUB Menu. I know what I want it to look like (grub_wanted.jpg), and I think I know how to get it by uninstalling a couple of things, (synaptic.jpg). Now I have too many items on the screen, and it looks cluttered to me (grub.jpg).
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Jun 17, 2010
Here's my current setup:
Disk 0 (500GB): Windows Vista
Disk 1 (1TB): Windows 7
Disk 2 (160GB): Ubuntu
My boot disk is Disk 0. Currently when I turn on the PC, GRUB loads from Disk 0. I can then choose either Ubuntu or Windows Loader. If I choose Windows Loader (also located on Disk 0), I can choose to load Windows Vista or Windows 7. I like this setup, but I would like to move the loaders (exactly as they are) to Disk 1 so that I can format Disk 0.
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Oct 2, 2010
How do I setup a host computer to accept display from laptops in a group of laptops?
I have a group of people each set to manage a specific task. I have a projector in the middle of the room hooked up to a computer. How can each user push their screens to the host computer? All computers are on a lan
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Mar 21, 2011
I've been a long time Windows user, but I've started a small firm and because of lack of funds, I've decided to install Ubuntu on my company's PCs.I have 8 PCs in total - 6 of them with Intel CPUs, and the last two with AMD CPUs. I bought the extra two computers because I've managed to find an extra two people to work at my company, and AMD-based PCs are cheaper so I've decided to buy them instead of Intel.Long-story short, I've installed Ubuntu 9.10 and boot time takes about half-an-hour. After the computers finally boot, USB hardware doesn't work at all. I was forced to buy PS/2 keyboards & mice and they both work fine after the PCs boot.I don't know what's causing this delay.I've enabled Cool 'n Quiet from BIOS.I've tried several instructions like editing the /etc/modules file.I've installed cpufreqd, tried to configure it, but it didn't work.I've check the CPU stats and my CPUs are running at 800MHz. I can't believe nobody managed to fix the 800MHz problem as I've noticed it's quite common among AMD Ubuntu users. I think I've tried almost anything that I've found on this forum.I can't keep asking my employees not to reboot their PCs. Both Chrome/Firefox crash a lot on Ubuntu so they're forced to restart their computers.The computer specs are: AMD Athlon II X2 240 dual-core @ 2.800MHz, 2GB RAM, 500GB HDD, etc.
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Dec 16, 2010
I followed a tutorial to install XP across my entire HDD. I installed Ubuntu 10.10 "Alongside another OS". Ubuntu loads fine, but when trying to load XP, the boot screen shows up, but then the computer restarts and returns to the GRUB menu.
I saw some threads on this site and tried to type: sudo gedit /boot/grub/menu.lst
In the terminal. It returned a blank text document so I'm not sure if that information was outdated. I then typed: sudo fdisk -l
And got this:
Not sure what any of this means, but I sure hope someone else does. I would say forget XP, but it's hard to let go of some of the games and software I use. I appreciate any responses, thank you.
I tried to format the table as it appeared, but the forum corrected the extra spaces.
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Jan 6, 2011
it started with rooting my Motorola Droid. I got quite interested in the whole rooting/linux "world". The only problem is, my hands move A LOT faster than my brain does. I'm an "educated novice" at best when it comes to all of this and still learning slowly, but surely. I followed an online tutorial and before I realized quite what i'd done, I had dual installed Ubuntu linux 10.10 on my laptop. ISO'd this, partitioned that and realized....i'm in way over my head. Then I started researching how to just go back in time and get my "safe" windows vista back until I'm ready to make the switch to linux and just ended up getting more confused.
How do I actually BOOT into Windows on a dual boot computer that I apparently just created? How, if need be, do I undo everything I just did in the past few hours and careless tinkering? If I decide to stay with Linux, how do I get my damn wireless router to recognize?
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Feb 26, 2011
i have downgraded from Ubuntu 10.10 to Ubuntu 10.04. I've had some bumps along the way and finally was able to install 10.04 successfully. Right now, my computer will not boot from the HDD and will only boot from the USB drive that the LiveCD is on. When I reorganize to set HDD as primary boot, i get:id-laptop login:d-laptop password:and I can put that in but then it just gives me a command line that ends with ~$ i believe. How do I get it to boot from the HDD instead of from the USB without running into this problem?
If I resequence the boot to HDD as number two, it will juts go into the LiveCD mode. Am I supposed to reinstall 10.04 again? I know 10.04 was successfully installed because it said it was and it needed to restart so i hit the restart button. It also had my old desktop picture there and all my files AND i checked the system info before restarting (it confirmed that lucid lynx was running).
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Mar 1, 2011
I have (had) a dual boot computer;Win XP and Ubuntu 10.10 64 bit.I decided it was necessary to enlarge my Root and Home Partitions. Using the instructions http://ubuntuforums.org/showthread.p...ome+Partitions I successfully enlarged the partitions and restored 10.10 (I used the copy command suggested by Irony). However when I boot the computer it boots to Ubuntu but no longer gives me the option of going into XP(it is not listed in Grub menu). Is there a fairly straightforward way of getting XP back on the Grub menu so I can boot to XP again?
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Oct 23, 2010
Just installed Ubuntu 10.4 on a computer that normally runs XP Pro. I used a separate drive and unplugged the windows drive while installing Ubuntu (error number one right?). Ubuntu installed perfectly, plugged in windows drive, Windows boots perfectly. My only problem is that I don't have the boot list option unless I go into the BIOS and change default boot drive every time I want to switch OS.After a bit of research I configured GRUB to allow me to dual boot (Windows did not appear at first), but it boots directly into Ubuntu (fine for me, but my mother uses XP for work) instead of Windows. Unfortunately I have some sort of keyboard issue that makes the arrow keys inoperable until the machine has once booted into an OS.
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Aug 16, 2011
I have recently been trying to change the boot screen (not the Grub screen). I came across a way to change it, however it need to install a .deb file called Zorin Splash Screen Manager.
Zorin is currently unavailable for download, the website seems to be down, as well as the majority of the links I have found to it.
Is there a way to manually switch the default boot screen/animation to the custom ones I've installed? Or, if anyone has a link to the .deb file that would be great too.
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Feb 22, 2010
I have a Toshiba NB 205 Netbook. It is currently dual boot with Win 7 and UNR (9.10). The default OS is Win 7. I would like to leave the machine as dual boot, but make UNR the default boot OS, so that I don't have to babysit the machine and choose UNR every time I reboot the machine. BTW, I am delighted with UNR! What a great OS. Really like how it plays so nicely with Firefox. And much faster than Win 7.
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Feb 22, 2010
My friend was showing me how to change the splash screen and used a app called start up manager (SUM).He changed the resolutions for GRUB and something else. The GRUB screen resolutions has changed fine but after that I get a line of text which I cant read as its too quick.
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Jun 6, 2010
I installed Ubuntu in my new notebook. It originally comes with Windows 7 installed on it.Everything works nice however every time i boot into Windows7 the grub menu doesn't work any more. i can't boot into windows or ubuntu any more. How do I stop this? Its rather annoying to have to boot, chroot and fix this problem everytime.
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Jul 1, 2010
I am running Lubuntu 10 from a USB drive. Despite this, I believe this question pertains to any other variant as well. Running from the USB drive with a persistent directory, there is no boot options file that I can locate. As an example, for an installed version, the file /boot/grub/menu.lst can be changed to make boot options permanent.
Is there any way I can do something similar when booting from a USB live version? Specifically, I want to add "vga=799" to the options without typing it in at every launch.
Or is the only option for something like this actually installing to a USB drive instead of just running the live version?
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Jul 8, 2010
When I installed Ubuntu on my laptop I selected English US (dead keys) as my keyboard layout, but a couple of days ago I decided to change it to English US (dead keys ALTGR) so I just went to the keyboard settings and added the layout, then deleted the old one "English US (dead keys)", logged out and selected the new one "English US (dead keys ALTGR)", logged back in and then restarted, and now I can't boot into Ubuntu, all I get is Grub but when I enter to Ubuntu I get a black screen and the Caps Lock light blinking.
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Sep 23, 2010
after having some boot issues not so long ago, i was pointed in the direction of rescatux, which solved my problem at the time. now im having a number of other issues. i am dual booting isodora mint and lucid ubuntu.when my lucid distro is working, it often becomes totally unresponsive during everyday tasks and when i go to restart (or any of the other options) from the shut down menu, i get the window appearing blank.upon rebooting (by pressing ENTER, which works even though there are no buttons within the window), it tells me to either insert boot media or there is a grub failure. this happens almost every session on the computer.
on the times when it says 'insert boot media', generally speaking turning it off for an extended period tends to work. the times when a grub failure occurs, going through rescatux's rescap leads to no other partitions being identified at least 90% of the time.is this something that anyone recognizes the signs for and can offer me a solution? or does this sound like an intermittent hardware problem?
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