Sudo nano etc/hosts can't save

Hi all,
Please help sorting my terminal, I'm having problem with my iTune evrytime I want to update or restore my ipad or iphone, it keep saying "this device isn't eligible for the requested build"
Now I tried to edit the etc/hosts using the Terminal, but suddenly all the script
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1          localhost
255.255.255.255          broadcasthost
::1             localhost
fe80::1%lo0          localhost
#74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com
are all gone i think i accidentally deleted it. so what i did was copy this from forum and paste it to terminal.
But i'm having problem to save it when I press ^O it goes like this:
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1          localhost
255.255.255.255          broadcasthost
::1             localhost
fe80::1%lo0          localhost
#74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com
File Name to Write: etc/hosts
^G Get Help         ^T To Files         M-M Mac Format      M-P Prepend
^C Cancel           M-D DOS Format      M-A Append          M-B Backup File
and I dont know how to save it. when I press ^X doesn't save at all.
Please Help me.
Thank you in advance.

Thanks.
What's this "sudo dscacheutil -flushcache"???
Why show this "when the system is booting. Do not change this entry."????
Can i add what i want between 127.0.0.1 localhost and 255.255.255.255 broadcasthost?
Why is saying i can't change the file, why can i unprotect? Explain me.
Thanks in advance
Message was edited by: NunoPortugal

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sudo chmod 644 /etc/hosts
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Those are the settings on my iMac.
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Message was edited by: BobHarris

How to save etc/hosts

Hi all,
Please help sorting my terminal, I'm having problem with my iTune everytime I want to update or restore my ipad or iphone, it keep saying "this device isn't eligible for the requested build"
Now I tried to edit the etc/hosts using the Terminal, but suddenly all the script
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1          localhost
255.255.255.255          broadcasthost
::1             localhost
fe80::1%lo0          localhost
#74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com
are all gone i think i accidentally deleted it. so what I did was I copy this from forum and paste it to terminal.
But i'm having problem how to save it, when I press ^O it goes like this:
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1          localhost
255.255.255.255          broadcasthost
::1             localhost
fe80::1%lo0          localhost
#74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com
File Name to Write: etc/hosts
^G Get Help         ^T To Files         M-M Mac Format      M-P Prepend
^C Cancel           M-D DOS Format      M-A Append          M-B Backup File
and I dont know how to save it. when I press ^X doesn't save at all.
Please Help me.
Thank you in advance.

Well lets make things easier, get out of Terminal by just Quiting it or Force Quit.
Download the free TextWrangler here
http://www.barebones.com/products/textwrangler/download.html
Now under the File Menu >Open File by Name
/etc/hosts
It should look like this, if not then just copy and paste it in.
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1       localhost
255.255.255.255 broadcasthost
::1             localhost
fe80::1%lo0     localhost
Now save it and give it your admin password and that's it. Easy as pie.
Terminal's pico and vi editing programs have a lot to be desired, but serve the basic puposes.
With Terminal you need to enter
sudo pico /etc/hosts
then enter your admin password to access a system file.
It can only be done via a Admin account, however with TextWrangler not only is it much easier, you can also access system files from a Standard user account.
the two lines
#74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com
You have there are "commented out" with the "#" symbol, basically your telling the computer to "ignore this line"
Why you think messing with your /etc/hosts file is going to solve your primary issue with iTunes/iPad/iPhone is beyond me.
Did you ever think that perhaps your two devices are too old for the "requested build"?

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Also make that password change.
Look in System Preferences -> Accounts to see if your friends added any new admin accounts or granted an existing account admin access.
If they know how to create ssh-keygen keys, they could have deposited a key in your /private/var/root/.ssh/authorized_keys2 file.
There are any number of additional tricks they could have done, if they had admin access. I'm just scratching the surface.
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[15:45:09][rabbie@sandnigga:~]#
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Date: Wed, 06 Jul 2011 20:06:43 GMT
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Last-Modified: Thu, 24 Mar 2011 11:40:59 GMT
ETag: "62206ad-6f-49f38f37ec8c0"
Accept-Ranges: bytes
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/etc/hosts: line 7: 127.0.0.1: command not found
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Sudo nano etc/hosts can't save

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