[SOLVED] Make a file not overwriteable

ted_chou12 · 08-22-2012, 04:27 PM

Hi, I don't know why, whenever I "touched" my admin network options, it tries to overwrite my /etc/resolve.conf file, and this causes me not able to connect to the www properly. I have to take some time to figure out this problem when it occurs and I have to login as root to edit the file. I wish to make the file not overwriteable. I already chmod the file to 444 only, but it seems still to be able to be overwrited, the system seems to have the power of root. I wonder if I could "fix" the file somehow so that the system can't modify it.
Thanks,
Ted

Habitual · 08-22-2012, 04:33 PM

sudo chmod 0000 /path/to/file ?

TobiSGD · 08-22-2012, 04:37 PM

Code:

chattr +i /etc/resolv.conf

will set the immutable flag for the file in question. For more info on chattr have a look at

Code:

man chattr

sag47 · 08-22-2012, 04:39 PM

Set the file to be immutable.

Code:

chattr +i /etc/resolv.conf

To disable it just

Code:

chattr -i /etc/resolv.conf

edit: ah tobi beat me to it

ted_chou12 · 08-22-2012, 04:52 PM

Thanks!

SharpyWarpy · 08-22-2012, 08:02 PM

I use

Code:

chattr +i cover_image.jpg

on front cover images of albums. Since I keep the front cover images in the same directory as the mp3 files making the image immutable helps me avoid mistakes like

Code:

id3v2 -a Foreigner *

in which case the poor image would have undesirable id3 tag information were it not immutable. That's just one example. And my 2 cents worth.