Archives

Sun
17
Feb
Satish Tiwary's picture

soft links and hard links in linux

hard links and sofft links in linux

This tutorial is all about how to create  and manage Soft links and Hard links to files in your linux system.Names for files are stored on disk in directories.Only the names of Files are stored in directory;the actual disk space is somewhere else.So it clearly means that  the names and the actual storage for the things being named are in separate places.The name of a file is kept in a directory separate from the storage space i mean hard disk For the things it names due to which multiple names and names in multiple directories; all the names refer to the same storage space.The actual data stored in a file or directory in linux machine disk is managed by data structers "Inodes".So as we know a user can linked a file with many files, so it becomes difficult to find original file when a file is chain linked with so many files.So here we will use readlink utility to find all the linked files.

Sat
16
Feb
Satish Tiwary's picture

df command in linux

DF command in Linux

df(Disk Filesystem) Provides Disk space usage of our File System.

df is a command line utility mostly used for checking disk space utilization in Linux.

 

Now Let us see what happen when we type df on terminal of a linux machine.

 

Sat
16
Feb
Satish Tiwary's picture

du command in linux

du command in linux

du command line utility  mostly used to display or find information related to hard disk and disk usage.

du utility Explanation:-

1.du command is used to see the disk usage.
At present i am inside the /var/ftp/ Directory and i want to see the complete Disk Usage Statistics of this
Directory and it's sub-directories.

[root@satish ftp]# du
10584   ./Server/repodata
2638388 ./Server
2638392 .

 

2.Now to see the above statistics in human readable format use option -h with du

 

Thu
07
Feb
Sarath Pillai's picture

YUM repository and package management: Complete Tutorial

YUM Repository Tutorial

Every operating system must have some or the other way to install a program. What's important is the fact that the user must not be given the responsibility of managing the overhead involved in the installation of the program.

You would ask,what's the overhead involved in installing a program?

Yes there are several overheads involved in installing a program in a computer Like the following.

Mon
04
Feb
Sarath Pillai's picture

IPERF: How to test network Speed,Performance,Bandwidth

Internet Speed Test in Linux

Testing network performance in terms of speed and bandwidth is a norm in both production and non-production environment.

A detailed report of speed and bandwidth analysis is very much necessary for the deployment of network dependent application servers. Also sometimes you need to double check the speed of your network throughput while troubleshooting. All these requires a reliable network performance testing tool. This post will be concentrating on one such tool called as "iperf".

IPERF is an open source tool that can be used to test network performance. Iperf is much more reliable in its test results compared to many other online network speed test providers.

Fri
01
Feb
Sarath Pillai's picture

Linux System IO monitoring

Linux IO monitoring

"Every thing is a file", is a very famous Linux philosophy. There is a reason for this philosophy to get famous. The main reason behind this is the fact that, Linux operating system in itself works on the same philosophy.

You might think that how can an operating system work on a philosophy like "Everything is a file".

Its because, Linux operating system consider's and work's with the below devices, by the same way we open and close a file.

Sat
26
Jan
Sarath Pillai's picture

Linux grub(Grand Unified Bootloader) tutorial

grub tutorial

It will be impossible to boot/start a Linux, or any other operating system, without the help of a boot loader. Boot loader plays a major role in bring up the system into running state. Infact the boot loader is the first program, that run's, when a computer is switched on.

Boot loader is the one, who transfers' control to an operating system kernel. Linux booting process requires special attention, and will be doing a dedicated post on that. In this post, we will be concentrating on GRUB(Grand Unified Boot loader), the default boot loader, for many Linux distributions.

Tue
22
Jan
Satish Tiwary's picture

ifconfig utility for linux users

ifconfig command in linux

Ifconfig stands for "Interface Configuration" .It is a utility for Linux machines  to configure,assign,add,delete,control and query network interface in Unix/Linux machine.

Common Linux users uses IFCONFIG command to assign ip address and netmask to an interface or to disable or enable a given interface.

Lets see how a Linux admin or a linux geek can have fun with this simple command.

slashroot is today will explain the power, the real strength of ifconfig command.

 

1.Show Network Devices and configuration and all network setting

Wed
16
Jan
Satish Tiwary's picture

Linux Touch command in detail

linux touch command tutorial

Linux Touch command in detail

Hiiee... everyone!!

Today i am going to explain in detail about the most used command in unix/linux history "touch command".New guys to linux want to know about the touch command in linux.

touch command in unix and touch command syntax in Linux/unix machine

Here we have explained touch command in linux with examples

Tue
15
Jan
Sarath Pillai's picture

What is TCP ping and how is it used

TCP Ping

There can be instances where a remote host, has blocked ICMP traffic towards it. Due to which you cant ping the host, to check its presence. In this kind of a situation, what you can do to check the host's presence is to telnet to a known port or to try making a TCP connection to the host.

Whenever you try to establish a TCP connection to the remote host, the remote host will either accept the connection or refuse the connection by sending a RST package. Even this information is more than enough to confirm the presence of the host.

So below two methods can be used to determine whether the host is online or not, whenever PING is disabled or blocked.

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