Tag Archives: Linux

Setting Proxy in Linux

Posted on November 27, 2015 by infologs

Through command line export http_proxy=http://proxyhost:port export https_proxy=http://proxyhost:port export ftp_proxy=http://127.0.0.1:3128 With authentication export http_proxy=http://user:password@host:port/ export https_proxy=http://user:password@host:port/ If the password is having special characters use the hex key code instead. Eg: If password is P@ssword use P%40ssword. %40 is the hex keycode … Continue reading →

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Assign VLANs with OpenVswitch fake bridges

Posted on July 6, 2015 by infologs

Lets create the fake vlan bridge vlan101. The syntax is ovs-vsctl add-br <fake bridge> <parent bridge> <VLAN> root@ubuntu:~# ovs-vsctl add-br vlan101 switch0 101 root@ubuntu:~# ovs-vsctl show 3bd99bd5-2e3b-41b8-8d84-66a75ebb97cc Bridge “switch0” Port “switch0” Interface “switch0” type: internal Port “vlan101” tag: 101 Interface … Continue reading →

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OpenVswitch Networking for LXC Continers

Posted on July 6, 2015 by infologs

Using the libvirt we can attach the LXC container to the OVS switches as the same way we do it for KVM vms Lets create an OVS bridge root@ubuntu:~# ovs-vsctl add-br switch0 root@ubuntu:~# ovs-vsctl show switch0 3bd99bd5-2e3b-41b8-8d84-66a75ebb97cc Bridge “switch0” Port … Continue reading →

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Provision LXC containers using Libvirt

Posted on June 25, 2015 by infologs

Install the libvirt if not already installed apt-get install libvirt-bin Create a XML definition file for the new lxc container cat test-container.xml <domain type=’lxc’> <name>test-container</name> <memory>127680</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <clock offset=’utc’/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/lib/libvirt/libvirt_lxc</emulator> <filesystem type=’mount’> … Continue reading →

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Define the network through virsh

Posted on June 22, 2015 by infologs

This post will show you how to define a new network in libvirt. Below network has two trunked VLAN portgroups and an untagged portgroup. [root@centos7 ~]# cat ovs.xml <network> <name>ovs</name> <uuid>cdbd8024-bb4e-4b98-8ef0-e5eeff673e48</uuid> <forward mode=’bridge’/> <bridge name=’OVS-br0’/> <virtualport type=’openvswitch’/> <portgroup name=’trunk1′> <vlan … Continue reading →

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OpenVswitch installation in Centos7

Posted on June 22, 2015 by infologs

Download the required packages though yum yum -y install wget openssl-devel gcc make python-devel openssl-devel kernel-devel graphviz kernel-debug-devel autoconf automake rpm-build redhat-rpm-config libtool Prepare the directories for building the RPM, download source and build mkdir -p ~/rpmbuild/SOURCES cd ~/rpmbuild/SOURCES/ wget … Continue reading →

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How to attach LXC container to OVS (OpenvSwitch)

Posted on June 19, 2015 by infologs

By default lxc containers will be attached to the Linux bridge lxcbr0 Create a new LXC container lxc-create -n ubuntu -t ubuntu Check the bridge configuration root@ubuntu:/var/lib/lxc/ubuntu# brctl show bridge name bridge id STP enabled interfaces docker0 8000.000000000000 no lxcbr0 … Continue reading →

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Ubuntu Brightness resetting to Maximum on every Restart

Posted on September 21, 2012 by infologs

Fix this by adding the below parameter to /etc/rc.local echo X > /sys/class/backlight/acpi_video0/brightness Replace the the X with the preferred brightness value 0-10. This solution is not perfect as it will not set to the new value if you change … Continue reading →

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USB Mouse stops working in Ubuntu Laptop

Posted on September 21, 2012 by infologs

Yes, some times it is really frustrating that the simple things in Linux stops working and you don’t have any clue about what setting need to be changed. I think that’s why it is still not the preferred desktop OS … Continue reading →

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iSCSI Initiator Settings

Posted on August 13, 2012 by infologs

There are couple of setting you can tweak on the initiator. Initiator Name Edit the /etc/iscsi/initiatorname.iscsi file and replace the number with your initiator hostname. InitiatorName=iqn.1994-05.com.redhat:node1 Restricting iSCSI interface If there are multiple ethernet interfaces, it is possible to restrict … Continue reading →

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