Technology , Life & Beyond
though my CPU ideal time is bery high, the mouse lagg or jerk most of the time
here is my top looks like
tried apt-get update and upgrade but no luck,
got this solution over google search and seems helpful.
Fix:
sudo -i
echo N> /sys/module/drm_kms_helper/parameters/poll
echo "options drm_kms_helper poll=N">/etc/modprobe.d/local.conf
it is moving much faster and better, "PLEASE DONT CHANGE MOUSE SETTINGS AFTER THIS"
jwhois is a whois client that accepts both traditional and finger-style queries. You can install the same using yum in Centos and apt-get in Ubuntu systems
Centos :
yum -y install jwhois
Ubuntu
sudo apt-get install jwhois
In Centos/ Redhat systems you can run the command whois
# whois ajayadas.com
[Querying whois.verisign-grs.com]
[Redirected to whois.godaddy.com]
[Querying whois.godaddy.com]
[whois.godaddy.com]
Domain Name: AJAYADAS.COM
Registry Domain ID: 1545424198_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.godaddy.com
Registrar URL: http://www.godaddy.com
Update Date: 2013-05-12T10:55:01Z
Creation Date: 2009-03-04T22:04:18Z
Registrar Registration Expiration Date: 2017-03-04T22:04:18Z
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
But in Ubuntu based systems you have to run jwhois
$ jwhois ajayadas.com
knockd – a port-knocking server . It’s amazing and I feel it’s an essential tool to secure the ports.
Here i setup knockd server for Open-SSH in ubuntu
#1: Install Knockd
$ sudo apt-get install knockd
up on installation, you will get a message says knockd is disabled
#2 : First need to configure the files before we start the service , edit knockd.conf file
$ sudo vim /etc/knockd.conf
this is how my file looks like
[options]
UseSyslog
[openSSH]
sequence = 7000,8000,9000
seq_timeout = 5
command = iptables -D INPUT -p tcp –dport 22 -j DROP
tcpflags = syn
[closeSSH]
sequence = 9000,8000,7000
seq_timeout = 5
command = iptables -A INPUT -p tcp –dport 22 -j DROP
tcpflags = syn
#3: Edit /etc/default/knockd file to enable the service
$ sudo vim /etc/default/knockd
my file looks like this
################################################
#
# knockd’s default file, for generic sys config
#
################################################
# control if we start knockd at init or not
# 1 = start
# anything else = don’t start
#
# PLEASE EDIT /etc/knockd.conf BEFORE ENABLING
START_KNOCKD=1
# command line options
KNOCKD_OPTS=”-i eth1″
#4 Start the service
sudo service knockd start #<– start server
sudo service knockd stop #<– stop server
sudo service knockd restart #<– restart server
sudo service knockd status #<– see status server
#5: how to use knock
From client machine try this (you might need to install knockd)
knock -v 192.168.1.2 7000, 8000, 9000
you will see
hitting tcp 192.168.1.1:7000
hitting tcp 192.168.1.1:8000
hitting tcp 192.168.1.1:9000
Whala! now you can ssh into the machine
ssh ajay@192.168.1.1
To get started, press Ctrl – Alt – T on your keyboard to open Terminal. or open your gnome-Terminal (If installed)
When it opens, run the commands below to install SSH Server.
sudo apt-get install openssh-server That's it! , if you need to change default port and stuff , edit the below file sudo vi /etc/ssh/sshd_config
or
sudo gedit /etc/ssh/sshd_config For a simple and quick SSH client, click here to download Putty.
We can manually edit these files using a text editor like vim:
sudo vim /etc/hosts sudo vim /etc/hostname
In /etc/hostname simply overwrite the existing hostname with a new one. In /etc/hosts
you will find the hostname on the line beginning 127.0.0.1 – overwrite only the hostname with the new one, and then reboot.
