HOWTOS

This category includes the guide for various software installations on supporting hardware and programming ends.

How To Fix if Partition Table Entries not in Disk Order

The suggestion given below can help if your partition table is not in a proper disk order. From linux fdisk (fdsik /dev/), choose the advanced menu (by pressing x, afaik), then choose the entry for correcting partition ordering (press 'm' anytime [...]

Bobbin Zachariah 11:01 pm

How to Boot Linux Grub into Single User Mode

Single User Mode

GRUB is a GRand Unified Bootloader, the default bootloader in Linux. GRUB can be used to boot Linux in the single user mode. The single user mode is a restricted mode, that is used for maintenance purposes. In single user mode, the [...]

Bobbin Zachariah 11:20 am

How to Check LUN or SAN Disk in Linux

When you are working in a storage environment, it is often desirable to add, remove or re-size storage devices. Once storage is allocated we need to scan and verify allocated storage SAN disk. In this article, I will show commands to check/identify [...]

Bobbin Zachariah 10:38 am

How to Configure Netdump Client on Linux

Linux Netdump

Netdump is used to transport kernel core memory images to a remote server during a crash. In this article, I will show you some useful commands to setup netdump on Linux. 1) Check Netdump Package To check whether “netdump” package has already [...]

Bobbin Zachariah 7:28 am

How to List Linux Pci Devices Using lspci Command

The peripheral component interface is a computer bus used for attaching the hardware devices in a computer. 'lspci' command is used in Linux operating system to display all the information about these PCI buses of the system and devices which are [...]

Bobbin Zachariah 10:09 pm

How To Use Screen And Script Command In Linux

The screen is a terminal multiplexer. Using this, you can run any number of console-based-applications, interactive command shells, course-based applications, etc. You can use screen to keep running program after you accidentally close the terminal, or even after you log out and [...]

Bobbin Zachariah 6:44 pm

Rsync Command Examples in Linux

In this article, I would show the different rync examples to sync file/directories to the destination server. Rsync can recursively copy files and directory, copy symlinks as symlinks, preserve (permissions, group, modification time and ownership). The main advantages of the [...]

Bobbin Zachariah 6:32 pm

How to Use Linux Route Add Command

This article I will explain how to modify, remove or add static routes in Linux with route add command. Routing is the way that computers communicate on a local network or over the internet. When you want to talk to someone, [...]

Bobbin Zachariah 2:29 pm

How to Extend and Resize LVM Partition in Linux

extend resize lvm linux

Logical Volume Manager(LVM) allows the Linux kernel to manage large disk drives effectively. This allows users to create partitions from more than one disk and allows them to extend the filesystem size online within a few seconds. In this article, [...]

Bobbin Zachariah 11:51 am

Linux Scan for New Scsi Device to Detect New Lun without Reboot

How do you verify or scan once storage LUN is mapped or allocated to your system? In this article, I will show you how to scan scsi device on Linux system. Reboot is one option to see the allocated disk [...]

Bobbin Zachariah 11:42 am

Can dd Command Used To Wipe Data? Examples

Linux dd command

dd is a common Unix program whose primary purpose is the low-level copying and conversion of raw data. You can use this command backup whole hard drives, create a large file filled with only zeros, create and modify image files [...]

Bobbin Zachariah 11:30 am

How To Use Linux Kill Command

Linux Kill Command

The word kill itself shows its clear meaning and purpose. In Linux, kill command is used for terminating the process. The command kill sends the specified signal to the specified process or the process group. First we need find PID [...]

Bobbin Zachariah 11:27 am

Creating Logical Volume On Existing Volume Group In Linux

Create logical volume on existing VG (Volume group) First make sure you have proper space to create new lv. From the below output, you can see there is enough space to have a new lv: #vgdisplay /dev/vg01 --- Volume group [...]

Bobbin Zachariah 11:22 am

CPU Bottleneck - How To Use Vmstat, Mpstat and SAR Commands

Linux CPU

One of the main functions the kernel or Operating System is Memory Management. When process try to access physical memory, if physical memory not free, than kernel move the inactive processes to virtual memory then it is called Paging. To know [...]

Bobbin Zachariah 11:27 am