clamav Signatures not Updating Ubuntu Linux | Clamav will sometimes have trouble downloading updates for some reason or another. I’ll show you how to fix this in Ubuntu Linux! First, stop clamav: $ sudo /etc/init.d/clamav-daemon stop $ sudo /etc/init.d/clamav-freshclam stop Next we are going to manually download the latest signatures from clamav’s website and place them into the proper location in Ubuntu.
Fast Host Discovery with nmap | The easiest way to do host discovery is with nmap. nmap of course offers a variety of ways to probe and map out detected hosts and poke at any open ports or services. But as for a quick discovery, ICMP is ideal to just get a quick assessment of online hosts. I’ll show you how!
Example Interview Questions for Networking or Linux Jobs | Below are a few good interview questions for networking or Linux related jobs. These will give a relatively good assessment if the candidate has good knowledge of some fundamentals. Alternatively, this makes a great study guide if you are applying for any networking or Linux related jobs. Wikipedia is the best guide and much better
How to Manually Edit ufw Rules on Ubuntu Linux | ufw is the great command line app for managing iptables in Ubuntu. While any changes should use the ufw command, it is possible to rather manually edit user created ufw rules in cases where that might be desirable. The file location is: /lib/ufw/user.rules For ipv6 rules, the file is: /lib/ufw/user6.rules As with iptables, rules are
bing – Measure Bandwidth from Command Line | The command line program bing measures bandwidth between two point to point locations. This is an excellent tool for testing throughput or interfaces. Here is how it works! Install bing: $ sudo apt-get install bing The syntax is: $ sudo bing [host1] [host2] bing works by sending an ICMP echo request and measuring the delay
ss – the alternative to netstat | An alternative to netstat is the utility ss. ss dumps socket statistics in a clear and more simple view as compared to netstat. Let’s check it out! With no options specified, ss displays a list of TCP sockets with established connections. This is useful on a server to see what clients are connected. The option
How to login via SSH to Amazon EC2 instance | After launching a Linux Amazon EC2 instance, you can ssh in by using the private key (key pair download) provided in the AWS console. I’ll show you how! 1. In the AWS console, a key pair can be generated. Download the key pair (private key, .pem file) from the console. 2. Next, move this .pem
Install EPEL Repository for CentOS 6 | The Fedora EPEL Repository provides many additional packages that are for use with either Red Hat or CentOS. I’ll show you how to add this repository for CentOS 6! Run the following command (you do use sudo, right?!): 32bit: $ sudo rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm 64bit: $ sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm Now enjoy 7674 additional packages
Install Drupal 7 in Ubuntu 12.04 | Drupal 7 is provided in Ubuntu 12.04. I’ll show you how to get it up and running! 1. Install the package drupal7: $ sudo apt-get install drupal7 2. Create the following apache site configuration file: $ sudo nano /etc/apache2/sites-available/drupal7 Alias /drupal7 “/usr/share/drupal7″ < Directory /usr/share/drupal7 > Options -Indexes FollowSymLinks MultiViews < /Directory > 3. Enable
Change sudo default password cache | sudo’s default password cache time is 5 minutes. To change the default time, it is possible to edit a setting in /etc/sudoers as desired. I’ll show you how! Edit /etc/sudoers with your desired text editor, or as standard with sudo visudo: $ sudo visudo For example, to increase the timeout to 30 minutes for user