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I'm trying to create an exception file to disable my ethernet as I think it's responsible for my 350s+ boot times, please see section of dmasg below :-

[ 3.750961] sd 6:0:0:0: [sdb] Attached SCSI removable disk [ 364.079424] ADDRCONF(NETDEV_UP): eth0: link is not ready

I'm following this answer Disable Ethernet permanently to speed up boot time and I've created the file but I can't save the edited version, the permissions tab tells me it's owned by root.

Any help is most appreciated. I'm a proper linux newbie, trying to get it to work on this laptop is my first foray into Ubuntu. I read messing with the root 'account' is not something for people who don't know what they're doing (i.e. me!). Please be gentle :-)

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up vote 5 down vote accepted

You need to open the terminal (ALT+CTRL+T) then enter:

gksu gedit /path/to/file.conf

Enter your password, then edit the file and save.

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In reply to edit: "Never use sudo with GUI software" I never knew about that as it always worked fine for me, could you do me a favor and explain why? – Steve Sep 6 '12 at 20:23
Actually, it can cause extraneous files to be left. However, you can use nano if you know how. – hexafraction Sep 6 '12 at 20:34

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