RSSCategory: LINUX HOWTO

Linux id Command - Print user ID and group ID information

To log in into a computer, we need a username. Username is an identity to recognized by a computer. Based on it, computer will apply a set of rules to a someone that log in with that username. On Linux system we can use id command. What is id command id command is command which […]

December 21, 2013 | By
| Reply More

Linux iostat Command to Report CPU Statistics and I/O Statistics

A Central Processing Unit or CPU is the brain of the computer. All of processing command is run here. Input / Ouput or I/O also play critical roles. The disks is used to provide data to processor and keeps the data which has been processed by CPU. One of the methods for measuring processor utilization […]

December 20, 2013 | By
| Reply More

Linux vmstat Command - Tool to Report Virtual Memory Statistics

As we already know that computer must have memory which called RAM to make the computer works. RAM is refer to a physical memory that planted into the computer mainboard. This RAM is used to load applications such as browser, word processor and so on. So actually, programs that you are using are running on […]

December 17, 2013 | By
| Reply More

Add / Remove Software Using apt-get from Terminal In Ubuntu / Linux

I know that to be a ninja in the linux terminal is hard, but it is not impossible. With passion, hard work and dedication you can achieve whatever you want and if you want to be a 'killer' in the terminal you are in the right place. Are you the type of Ubuntu linux user […]

December 16, 2013 | By
| Reply More

Ksplice - Install Linux Kernel Updates without Reboot

Have you ever see this message after installing kernel updates? For System Administrators, server uptime is important. Productions servers which running mission critical application, must be running as long as possible. But in the other side, System Administrator have to apply patches to their servers in order to maintain the reliability of their servers. If […]

December 15, 2013 | By
| Reply More

Install And Learn How To Use ufw Firewall In Linux

Ubuntu does not have many open ports by default, but there are times when you want to restrict access to a port(ports) or a specific ip adress. Maybe you run a ssh server in your ubuntu machine and want to block everyone from connecting to it, except yourself. Have you ever thought how to accomplish […]

December 14, 2013 | By
| 3 Replies More

Linux lsusb Command to Print information about USB on System

Universal Serial Bus or USB was designed to standardize the connection of computer peripherals such as keyboards, pointing devices, printers, digital cameras, portable media players, disk drives and network adapters) - Source : Wikipedia Since it becoming a industry standard, now it’s hard to see a computer without USB port on it. The usage of […]

December 14, 2013 | By
| Reply More

Linux mpstat Command - Reports Processors Related Statistics

Generally today computer is using multiple processors. Or maybe 1 physical processor with 4 cores inside. On server side, more processors or cores means more power. But the other side, application also more power consumption. You may find a situation when your cpu utilization is high but you feel that you don't running anything. On […]

December 13, 2013 | By
| Reply More

Linux whoami command - Knowing Who is Logged In

Generally, on your console you will find a username is printed on the command prompt. But in some shell such as csh, by default you will not see your username there. So this command particularly is used with the shell which don’t print the username on their shell. How do I run whoami To run […]

December 12, 2013 | By
| Reply More

Linux dmesg Command to Print or Control the Kernel Ring Buffer

Sometime we underestimate the existence of logs. For system administrator logs is important. From log, we can analyze what cause an error. Linux has dmesg or Display Messages. Why we need to know about dmesg? Let’s start to explore it. What is dmesg dmesg is a command that print kernel messages into your screen. What […]

December 10, 2013 | By
| 2 Replies More

How to use Linux Netcat Command as Port Scanner

Hi linoxide readers! Today we will teach you how to perform port scanning with the TCP/IP Swiss Army Knife tool, netcat. What is Netcat? nc, also known as the TCP/IP swiss army knife is a feature rich network utility which can be used to read and write data to network connections using TCP or UDP. […]

December 10, 2013 | By
| Reply More

Linux w Command to See Who is Logged In And What Doing

As system Administrator, you must manage the users who logged in into your system. Allow them to do something, and restrict them do the rest. It’s a normal procedure for system Administrator. But you should not trust them 100% . People changed. Sometimes leak comes from inside, not from outside. To prevent that thing, you […]

December 10, 2013 | By
| Reply More

Linux cal and ncal Commands to Display Calender

Beside date command, Linux also has cal command to display calendar. As its name, cal just show you the calendar in many ways. There is also ncal command which have same function with cal. Let’s start. Run cal Cal is a built-in command which shipped in every Linux distribution. To run cal, just type cal […]

December 8, 2013 | By
| Reply More

Linux date command - Display and Set System Date and Time

Date on the operating system may only be considered as a timepiece. Especially on console mode, we do generally not see date as an important think. But for Administrator, this assumption is false. Do you know that a wrong date and time can make you can’t compile an application? Because date and time is important, […]

December 7, 2013 | By
| 3 Replies More