How to Configure FTP Server in Linux RHEL 6

In this post i will show how to install Very Secure FTP (Vsftpd) and how to configure ftp server in linux Red Hat Enterprise Linux 6 (RHEL 6). Vsftpd is a GPL licensed FTP server for UNIX systems, including Linux. It is secure and extremely fast and it is stable. As an example I will install […]

7 Useful Linux Utilities

There are 7 useful linux utilities that you must install on new linux server. Most Linux distributions are equipped with tons of linux command utility, but if you have installed minimal operating system, all these software will not exist. These tools will very useful in your troubleshooting and will help to find possible causes of […]

How to Install VMware Tools on Red Hat Enterprise Linux 6.2 (RHEL 6.2)

This post will shows how to install VMware Tools on Red Hat Enterprise Linux 6.2 (RHEL 6.2). VMware Tools is a group of utilities that enhances the overall performance of the virtual machine’s guest operating system (OS) and improves management of the virtual machine (VM). This is one of important components in order to provide […]

How to Remove Volume Group and Physical Volume on LVM

Basically, adding and removing LVM will always involves these three logical “layers” which are Physical volumes (pv), Volume groups (vg) and Logical volumes (lv). This post assumed that the Logical volumes haven’t created. In certain situation, linux administrators are required to remove the existing Physical Volume or Volume Group only. It is possible to perform […]

How to Secure OpenSSH (SSHD) on Linux

OpenSSH is a open source alternative to the proprietary Secure Shell software. It is also the SSH connectivity tools that allows you to remotely login, transfer remote file via scp or sftp. It was created as an open source alternative to the proprietary Secure Shell software. OpenSSH options are controlled through the /etc/ssh/sshd_config file. In […]

How to Check Disk Read Write Speed in Linux

Measuring sequential disk performance is easy in linux as every modern Linux distribution comes with a command line utility called hdparm. Hdparm is a free tool to measure sequential disk performance which is primarily used to tune and optimize disk parameters. It is important to read hdparm man page and perform full backup before using […]

How to Remove a Logical Volume on CentOS 6.3/RHEL6

In previous post, i have cover the steps to create additional Logical volume manager (LVM). In certain situation, linux administrator is required to remove the existing logical volume. It is possible to perform the required task if that system administrator has the right skill on linux. Otherwise, they will put themselves and the organization in […]

How to Create Additional LVM on CentOS 6.3

This post will covers the steps to create additional Logical volume manager (LVM) on CentOS 6.3. This will very useful when the production system facing run out of disk space to store data. Sometimes there is another request for them to create additional LVM for new system or to store data. It is possible to […]

How to Add Webtatic Repository on CentOS 6.3

This post covers the steps on how to setup additional yum repository using Webtatic. Webtatic yum repository is a repository containing updated web-related packages for CentOS and Redhat Enterprise Linux (RHEL). Webtatic goals are to provide CentOS/RHEL administrators with the latest stable minor releases of web development/hosting software, which are not provided in CentOS/RHEL distribution […]

How to Check Postfix Version

This short guides shows how to quickly check your postfix mail server version. Basically, postfix is a open-source mail transfer agent (MTA) that routes and delivers electronic mail. Postfix is an alternative for Sendmail service which provide the same function. Please execute the following command : postconf -d | grep mail_version Examples : [root@centos62 ~]# […]

How to Switching or Changing Between Different Runlevels on Linux

The runlevel is a software configuration of the system which allows only a selected group of processes to exist. Usually runlevel 0, 1 and 6 are the same and reserved for the following purposes : 0 – halt 1 – single mode 6 – reboot Meanwhile runlevel 2,3,4 and 5 used for the following : […]

How to Check and Display Runlevel on Unix or Linux System

This example shows the correct ways to check run level on unix or linux server. The runlevel is a software configuration of the system which allows only a selected group of processes to exist. The processes spawned by init command/process for each of these runlevels are defined in the /etc/inittab file. Usually runlevel 0, 1 […]

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