5 commands to check memory usage on Linux

Memory Usage On linux, there are commands for almost everything, because the gui might not be always available. When working on servers only shell access is available and everything has to be done from these commands. So today we shall be checking the commands that can be used to check memory usage on a linux system. Memory include RAM and swap. It ...

Open http port ( 80 ) in iptables on CentOS

Iptables firewall I was recently setting up a web server on centos with nginx and php. The installation of nginx was fine, but the http port of the system was not accessible from outside. This is because centOS by default has some iptables firewall rules in effect. Only the ssh port (22) was accessible and remote shell worked. So its necessary ...

Monitor disk io on linux server with iotop and cron

Iotop - Disk Input Output usage Recently my server was giving notifications of disk io activity rising above a certain threshold at regular intervals. My first guess was that some cronjob task was causing that. So I tried to check various cron tasks to find out which task or process was causing the io burst. On servers specially its always a ...

Install the Pantheon desktop on Ubuntu

Pantheon desktop environment Pantheon is a new desktop environment that comes with elementary OS. It has a mac like look and feel and has been designed very well. It looks superb specially on laptops and can give you a cool looking desktop that you want to show off. It can be installed on Ubuntu if you want to get the elementary OS ...

Elementary OS 0.2 Luna review – now that’s more like it

Elementary OS - Luna Elementary OS 0.2 Luna is a new Linux distro that has become quite popular recently. It is based on Ubuntu 12.04 LTS and has a visual design that resembles Mac OS very closely. This is the second version of elementary OS and the previous one was codenamed Jupiter. Elementary introduces a new desktop environment called Pantheon along with ...

Install virtualbox guest additions on elementary OS 0.2 luna

Elementary OS Luna Elementary OS is a great distro in the Ubuntu family of linux distros that offers a mac like look and feel on the desktop. It features a completely new desktop environment called Pantheon that is built atop GTK libraries. The desktop itself looks very stylish but very user-friendly and intuitive at the same time. And it looks great ...

Linux mail command examples – send mails from command line

Send mails from command-line Being able to send emails from command-line from a server is quite useful when you need to generate emails programatically from shell scripts or web applications for example. This tutorial explains, how to use to the mail command on linux to send mails from the command-line using the mail command. How the mail command works For those who are curious ...

Precise Puppy 5.7.1 review – a small and swift linux distro

Puppy Linux - the Precise variant Precise Puppy is a puppy linux variant that is "based" on Ubuntu 12.04 precise. It is designed as a small and fast distro that can run on older hardware with low resources. It is intended to be run in live mode rather than installing on the hard drive. The iso file can be burnt to ...

25 simple examples of Linux find command

Linux find command The Linux find command is a very useful and handy command to search for files from the command line. It can be used to find files based on various search criterias like permissions, user ownership, modification date/time, size etc. In this post we shall learn to use the find command along with various options that it supports. The ...

Setup a chroot environment on Ubuntu with debootstrap

Chroot Chroot provides a way to setup an isolated environment inside an OS, where specific applications can run without interacting with the rest of the system. It is also called a jail and is often used to create a test environment for applications which may not be directly installed on the system due to various concerns like stability or security. Running 32 ...

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