Porteus

Posted: **13 Aug 2022, 21:11**

I am using Porteus v5.0 in always fresh mode. Today I tried to change DNS nameservers by shell script. I did this :

sudo -s<<NW
echo "nameserver 208.67.222.222" >>/etc/resolv.conf
echo nameserver 208.67.220.220" >>/etc/resolv.conf
nmcli networking off
nmcli networking on
NW

I checked whether DSN nameserver changed or not by :

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sudo nmcli

command as @Blaze's suggested.
The thing I noticed that, when I restart the networking service, DNS nameserver file resetted, in other words changes deleted.
But, when I did @Blaze's suggested ( in the link https://askubuntu.com/questions/2321/wh ... the-dns-ip by using GUI of network manager and changed DNS name servers) then, after "off & on" of "networking" service worked and changed DNS settings.

Therefore, I could not find a pure shell script solution to change DNS nameservers yet

. If anybody know, please share with us

Posted: **17 Aug 2022, 22:04**

Hi,
Even if the topic has already been discussed in chat, here would be my suggestion.
Why do you want to edit DNS name servers by using a shell script?
The entries of resolv.conf are generated by NetworkManager at startup.

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root@azer:head -n 1 /etc/resolv.conf
# Generated by NetworkManager

root@azer:nmcli conn show
NAME                UUID                                  TYPE      DEVICE
xyz              ...................................      wifi      wlan0

insert nameserver

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root@azer:nmcli conn modify "xyz" ipv4.dns  "208.67.222.222 208.67.220.220"
root@azer:nmcli networking off && nmcli networking on

copy the corresponding file /etc/NetworkManager/system-connections/xyz.nmconnection into the filesystem at boot time.
maybe it helps ?

Posted: **21 Aug 2022, 17:18**

Thanks @itrukrakso, of course it helps. I will try it and write the solution here

I try to do it by script because I am using Porteus from USB in always fresh mode

Porteus

Changing DNS nameservers by shell script

Changing DNS nameservers by shell script

Changing DNS nameservers by shell script

Changing DNS nameservers by shell script