LINUX HOWTO

You can find some interesting articles & guides on Linux based softwares here.

How to Check Linux Shared Memory using ipcs Command

Shared Memory

Shared memory is the memory that may be accessed by multiple processes; i.e. a memory region that can be shared between different processes and a better way of passing data between two processes. Shared memory is the fastest form of [...]

Bobbin Zachariah 10:45 pm

How to Flush Routing Table from Cache in Linux

Routing Table

In this article, I will describe how to flush routing table in Linux using terminal commands. A routing table in computer networking is a data table that's stored on a router or network server which lists the routes to particular network destinations. Usually, each [...]

Bobbin Zachariah 10:39 pm

How to Create Swap File/Partition on Linux

Swap Linux

Swap memory is required when the system requires more memory than it is physically available. The kernel swaps out less used pages and gives memory to the current process that needs the memory immediately. So a page of memory is [...]

Bobbin Zachariah 10:37 pm

How to View Attached/Allocated Luns on Linux

Storage Lun

When you are working in a storage environment, it is often desirable to add, remove or re-size storage devices while the operating system is running and without rebooting. But instead of doing theses operations, you can most need to identify/show [...]

Bobbin Zachariah 10:36 pm

How to use XDMCP for Remote Desktop Access on Linux

XDMCP Linux

In this article, I will show you how to configure your Linux system to use graphical (GUI) login with XDMCP service to access remote GUI. Most Linux admins work from shell and there is not much requirement to connect to [...]

Bobbin Zachariah 9:16 pm

How to Backup LVM Configuration on Linux (vgcfgbackup & vgcfgrestore)

LVM Backup

Due to several reason a volume group may become corrupted after unintended user intervention. LVM will not be aware of this situation unless the alternate is already on the volume group, and may allow to add the alternate path to [...]

Bobbin Zachariah 9:14 pm

Setup Passwordless Ssh Login Between Linux Systems

ssh-password-less

Hi all, today we'll gonna learn how we can setup Passwordless SSH login to Linux systems. Only the workstations having the correct matching key pair (private and public) will be allowed to logon to the SSH server, without the key [...]

Bobbin Zachariah 9:12 pm

How to Create Partition in Linux

df-h

In this tutorial, let's learn how to create a partition on Linux using fdisk commands. Fdisk is a command line utility that provides disk partitioning functions for various operating systems. It was originally developed by IBM in 1983 and since then [...]

Bobbin Zachariah 9:09 pm

Learn 5 Simple Tips to Fix Booting Issues in Linux

Booting Linux

As for many systems, you can use it every day but it can happen that for some reason, your Linux wont boot and you need to know how you can do in these situations. Some Linux distributions don't offer a [...]

Bobbin Zachariah 4:36 pm

How to Setup Ethernet Bonding in Linux

ethernet bonding

Ethernet bonding is a method of combining (joining) two or more network interfaces together into a single virtual NIC card which may increase the bandwidth and provides redundancy of NIC Cards. Linux allows to bond multiple network interfaces using a special [...]

Bobbin Zachariah 4:12 pm

How to Scan Lun on Vmware Running Redhat Linux Guest OS

Storage Linux

In this tutorial, I will show how to scan LUN from a Redhat Linux Vmware Guest OS (This example is from RHEL3). Once LUNs are mapped for VM's, it should be made visible to the OS. Below commands helps to [...]

Bobbin Zachariah 4:09 pm

3 Ways to Force Unmount in Linux Showing “device is busy”

NFS Linux

When you do an NFS mount, it sometimes shows "device is busy” status, in such case we need to perform force unmount in a graceful way. There are different ways and options we can try out if normal nfs unmount fails. [...]

Bobbin Zachariah 12:21 pm

Easy Steps Enabling SNMP and Configuration In Linux

SNMP Linux

Before I explain about Linux SNMP configuration, I'll let you know what is SNMP. Simple Network Management Protocol (SNMP) is a well known protocol for network management. It is really hard to manage large networks that have thousands of network device. [...]

jomos 12:17 pm

How to use Linux tr Command with Examples

Linux Tr command

The tr command is used in Linux for translating characters. it needs two sets of characters. It replaces occurrences of the characters in the first set with the corresponding character from the second set. For example, tr command can be used [...]

Bobbin Zachariah 12:01 pm