Can not edit resolv.conf
Solution 1
Stumbled on this problem on CentOS8.
The file may be marked immutable:
# lsattr /etc/resolv.conf
----i--------------- /etc/resolv.conf
Remove the immutable flag as follows:
# sudo chattr -i /etc/resolv.conf
# lsattr /etc/resolv.conf
-------------------- /etc/resolv.conf
Source: https://forums.centos.org/viewtopic.php?t=73182#p307891
Solution 2
The proper way to edit resolv.conf if to add nameserver xxx.xx.xxx.xxx
lines to either base, head, or tail files in /etc/resolvconf/resolv.conf.d
. They belong to root, but you can edit them with sudo ( or gksu if you prefer graphical text editors ).
Although you ask for editing resolv.conf, there's another way to sent dns in ubuntu that doesn't involve resolv.conf. Look at the line 18 of my /etc/dhcp/dhclient.conf
file. Line 19 is also a practical way to do it.
1 # Configuration file for /sbin/dhclient, which is included in Debian's
2 # dhcp3-client package.
3 #
4 # This is a sample configuration file for dhclient. See dhclient.conf's
5 # man page for more information about the syntax of this file
6 # and a more comprehensive list of the parameters understood by
7 # dhclient.
8 #
9 # Normally, if the DHCP server provides reasonable information and does
10 # not leave anything out (like the domain name, for example), then
11 # few changes must be made to this file, if any.
12 #
13 option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
14 #send host-name "andare.fugue.com";
15 send host-name = gethostname();
16 #send dhcp-client-identifier 1:0:a0:24:ab:fb:9c;
17 #send dhcp-lease-time 3600;
18 supersede domain-name-servers 208.67.222.222,208.67.220.220,8.8.8.8;
19 # prepend domain-name-servers 208.67.222.222,208.67.220.220;
20 request subnet-mask, broadcast-address, time-offset, routers,
21 domain-name, domain-name-servers, domain-search, host-name,
22 dhcp6.name-servers, dhcp6.domain-search,
23 netbios-name-servers, netbios-scope, interface-mtu,
24 rfc3442-classless-static-routes, ntp-servers,
This sets my dns and lets me browse webs (and nnm-tool command confirms all three dns are used) no matter what i write in my resolv.conf. So try this
Solution 3
I guess you are having a red color resolv.conf in /etc/
-
Add these commands:
sudo nano resolv1.conf nameserver 8.8.8.8
-
Save it.
sudo rm resolv.conf sudo mv resolv1.conf resolv.conf
Reboot.
That should be Ok.
Solution 4
If you are using standard Ubuntu then the answer is: Don't edit /etc/resolv.conf but use resolvconf methods to configure what gets written to resolv.conf. There is other documentation and there are other answers in AskUbuntu which cover how to do that.
If you are using a machine that your company has configured other than in standard Ubuntu ways (e.g., so as not to use resolvconf to manage resolv.conf) then you should ask your company IT support department for instructions. Assuming that these instructions really do involve editing /etc/resolv.conf, you should (1) make sure that /etc/resolv.conf is not a symbolic link or remove the symbolic link if it's there; then do (2) sudo vi /etc/resolv.conf
and edit the file.
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iec2011007
Updated on September 18, 2022Comments
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iec2011007 over 1 year
I am using Ubuntu 14.04 and I have to edit the
resolv.conf
fileSo this is what I am trying to do
sudo su vi /etc/resolv.conf
But when I try to edit it says the file is read only
When I try to do
chmod +w /etc/resolv.conf
it gives the errorOperation not permitted
How to edit it. I have to edit as this laptop was given to me by company and they configured the nameserver but when I try to use it at home then my wifi though connected but I am not able to use Internet.
If I ping 8.8.8.8 it is working
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Admin about 9 yearsBy the way, there's never any reason to run
sudo su
. If you have activated the root account, usesu
alone and if not, usesudo -i
to get a root shell.sudo su
is pointless.
-
-
Mantra about 9 yearsThe OP is already using
sudo su
, thenvi
to edit the file. -
Sergiy Kolodyazhnyy about 9 yearsHe asked what is the proper way of editing
/etc/resolv.conf
, which is what I answered. -
iec2011007 about 9 yearsI already told that with using sudo also I am not able to change the content it says operation not permitted please help me to edit
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Sergiy Kolodyazhnyy about 9 yearsWell, in that case you have two separate questions there. Can you edit using sudo any other file ?
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iec2011007 about 9 yearsThe nameserver which I want to add "127.0.0.1" is present in base but then also I am not able to access internet. Ping og 8.8.8.8 is successful
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iec2011007 about 9 yearsWhich type of file like at what location
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Sergiy Kolodyazhnyy about 9 yearsWell, how about /etc/bash.bashrc ? What happens when you try to
sudo su
and thenvi /etc/bash.bashrc
? by the way, what is the output ofls -l /etc/resolv.conf
? As for your "127.0.0.1" nameserver, you might want to read this question -
Sergiy Kolodyazhnyy about 9 yearsUm, what else you could try is reconfigure for dynamic updates
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iec2011007 about 9 yearsFor ls it says -rw-r--r-- 1 and trying the above commands opened the file and it is editable while without sudo it is not
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Dan M. CISSOKHO over 3 yearsthank you , you saved my day