Author Archive: Pungki Arianto

Pungki , currently working as a Linux / Unix administrator for a banking company. He love to work in Linux / Unix since it's fun for him. He is also interested in information technology, information security and writing.

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15 Linux cp Command Examples - Create a Copy of Files and Directories

Copying files or directories is one of basic activity in every operating system. Backup activity is basically is creating a copy of files and directories. On Linux system, we can use cp command to do it. What is copy command As we mentioned above, cp command is a command to create copy of files and […]

January 14, 2014 | By
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Linux pwd command - Know Your Current Working Directory

Where you are inside a deep directory, sometimes you may want to know where exactly you are. With this pwd command, you can do it. What is pwd Pwd is a command to print name of current / working directory. When we are “lost” into a deep directory, we can always reveal where we are. […]

January 10, 2014 | By
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20 Linux ls Command Examples to Display the Entries of Directory

One of the basic command in Linux is ls. Without this command, we may find difficulties to explore the content if directories. This command must known by everyone who want to learn Linux. What is ls ls command is used to list files and directories. By default, it will be list the content of current […]

January 9, 2014 | By
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Install Nmon - Monitor Linux System Performance using Java Analyzer

There are a lot of resource monitoring tools on the internet. On of the most used monitoring tool is nmon. With this tool, you can almost monitoring everything. From CPU, Memory, Disks, Network and even Filesystem can be monitored by nmon. What is nmon and Java Nmon Analyzer Nmon is a short for Nigel’s performance […]

January 3, 2014 | By
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Lynis - Security Tool for Audit and Hardening Linux / Unix Systems

System administrator must have known about the importance of security. Maintaining servers are not just make the server is up and running but it should be secure too. Security is not coming by default. We need to tune-up the systems to fit our needs. Since security has a wide coverage, sometimes its easy for us […]

January 2, 2014 | By
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userdel Command - Delete User Account from Linux system

Maintaining users on the server means add them, modify them and delete them. When a user is no longer need on the system for any reasons, we should delete it to avoid security breach. On Linux system we have userdel command to delete a user What is userdel Userdel is a low level utility for […]

January 1, 2014 | By
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Linux free Command - Display Free and used Memory in the System

System administrator must maintain the health of their server. One of the critical component is memory. When server memory is full utilized, it can slow down the server performance. To monitor memory utilization, Linux have another command that called free. What is free command Free command is a tool that can display amount of free […]

December 28, 2013 | By
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Linux who command - Displays who is on the system

As a system administrator, we need to ensure who is on the system on a particular time. We must keep on eye to our servers. But of course we can’t do that for 24 hours a day. On Linux system, we can use who command to see who is on the system What is who […]

December 22, 2013 | By
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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
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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
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RemoteBox - A VirtualBox Client

Virtualization is becoming a technology trend. The need of resource efficiency, energy efficiency and save money are one of the main reasons why we need virtualization. Virtualization is intended to servers or data centers. But now, users can also try or enjoy virtualization with VirtualBox. VirtualBox is free and it is intended for those who […]

December 19, 2013 | By
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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
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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
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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
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