Tag Archives: ip

How to use the ip command to bring up/down the network interface on Linux

Posted on January 21, 2018 by SoCRaT

The ip command is replacing ifconfig, which is getting deprecated and some distros have already removed it. To bring a network interface down, simply run the following: sudo ip link set enp0s25 down To bring it back up: sudo ip … Continue reading →

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Fix Slow SFTP/SCP File Upload Rate and Stalling caused by TCP SACK

Posted on July 26, 2017 by SoCRaT

In brief, sometimes a conflict occurs between some firewalls and the TCP SACK. In my case, the upload was severely affected and reached upload speeds of a few kilobytes over a LAN! The following command disables TCP SACK and fixes … Continue reading →

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How to configure network settings in CentOS (from dhcp to static)

Posted on October 25, 2014 by SoCRaT

It’s a bit different from what we’re used to do in Ubuntu, here are the instructions, assuming our network interface is eth0: Take a backup from the “/etc/sysconfig/network-scripts/ifcfg-eth0” file, e.g. by the following command: “cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0.bak” Open the “/etc/sysconfig/network-scripts/ifcfg-eth0” file for … Continue reading →

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