Dear LQ members
I am running Linux Mint 14 64 bit on my system.Each time I set my NIC to 100mps Full Duplex using sudo ethtool -s eth0 speed 100 duplex full. It work but when I try to have it permanent in etc/network/interfaces with an add in command.My network NIC will not work after a restart.

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
pre-up /usr/sbin/ethtool -s eth0 speed 100 duplex full (This is add in command to have it permanent)

After a restart,my network NIC will be down and after deleting the command and restart the pc, the network will be up again.Can I know which part of the command is wrong and do I need to create any other things to have it permanent

Thank you

If it worked by the terminal then it should work when hardcoded into the the config file.
Only... here in the given example it is evident that the add-in command is just misplaced. The init scripts in the /etc/init.d folder may have pointed to another *.conf file or, maybe, the script itself bears its own config variables. (I am no longer using Mint, there is no guaranty if I pretend to point to you which conf file.)

You may try use "find" or "grep" all over the /etc to locate the proper configuration file to your iface.

Hope this hint can help you.

Good luck.

Hi malekmustaq
Thank you for your reply but I don't really understand what you have mention.A step by step will be very welcome. Anyway thank you for your good hearted reply.

Dear LQ member
Is there anyone able to help me to set my network card speed to 100mps full duplex instead of Auto Negotiation each time after reboot in Linux Mint 14 64bit? Below is the config file from Terminal

user@user-System-Product-Name ~ $ sudo ethtool eth0
[sudo] password for user:
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric
Link partner advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on <------- (Set this permanent to OFF instead of doing it each time I reboot the system)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes
user@user-System-Product-Name ~ $ sudo ethtool -s eth0 autoneg off
user@user-System-Product-Name ~ $ sudo ethtool -s eth0 speed 100 duplex fulluser@user-System-Product-Name ~ $ sudo ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes
user@user-System-Product-Name ~ $

The below file is from etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
pre-up /usr/sbin/ethtool -s eth0 speed 100 duplex full <---- If I add this to my etc/network/interfaces, my network will be down after I restart the system and I will have delete it and restart my system then my network will be up again.


Please all help if possible. Step by step solution is very welcome

Thank you