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  • Data Center Solution

    A data centre is a facility where companies can keep and operate most of the ICT infrastructure that supports their business. IT host the most critical systems that are vital to the continuity of daily operations...

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  • Monitor your network and systems like a hawk

    There are some perfact open souce solution for monitoing your Network devices and server system's health. Nagios, Cacti, WhatsUpGold and Smokeping are the leading monitoring tools among them...

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  • Email service and Security

    Now a days life without email service is unthinkable and E-mail service is quite expensive. As always linux gives us the answer with a strong mail service named postfix...

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  • Data Center Solution

    A data centre is a facility where companies can keep and operate most of the ICT infrastructure that supports their business. IT host the most critical systems that are vital to the continuity of daily operations...

    Read More
  • Monitor your network and systems like a hawk

    There are some perfact open souce solution for monitoing your Network devices and server system's health. Nagios, Cacti, WhatsUpGold and Smokeping are the leading monitoring tools among them...

    Read More

Friday, July 9, 2021

How to solve a problem of NFS 'permission denied'

1. Created a new user at the QNAP server named 'username' and gave him full permission on the desired folder. For example, let's share the 'media' folder.2. Mounted the partition from the client machine[root@redhat ~]# mkdir /opt/mymedia/[root@redhat ~]# mount -t cifs -o username=username,password=user's_password,uid=application_name,gid=application_name //192.168.1.1/media /opt/mymedia/Testing:[root@redhat ~]# cd /opt/mymedia/[root@redhat mymedia]# lltotal 2-rwxr-xr-x 0 nginx nginx  7 2020-12-15 12:44 100.txt-rwxr-xr-x 0 nginx...

Friday, May 21, 2021

How to monitor hardware RAID array status from Linux

 First check which raid card we are using:To find out which RAID you are using, just type one command to the command line:[root@school ~]# lspci -vv | grep -i raid15:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS-3 3108 [Invader] (rev 02) Kernel driver in use: megaraid_sas Kernel modules: megaraid_sasThere may be several responses to this request: 1. Hewlett-Packard is your HP RAID array 2. 3ware is your 3ware RAID array 3. megaRAID is your MegaRAID arrayIf we do not receive a response or some other answer,...

Sunday, October 12, 2014

MYSQL ERROR 1051 (42S02): Unknown table corrupttablename

Very rare we got a message to the browser saying "Unknown table tablename". Though we have the database and the table properly to the server. To solve the issue, we need to follow the below steps- ERROR 1051 (42S02): Unknown table corrupttablename [root@db ~]# service mysqld stop[root@db ~]# mv /var/lib/mysql/database_name/corrupttablename.frm /tmp[root@db ~]# service mysqld sta...

Wednesday, August 27, 2014

How to capture network traffic using Wireshark & TCPdump

How to capture network traffic using Wireshark & TCPdump Using Wireshark (Grafical interface) Install wireshark: mahidul@mtr:~$ sudo apt-get install wireshark Or, download it from official site https://www.archlinux.org Error: Wireshark not listing interfaces on Ubuntu 12.04 precise pangolin Solution: mahidul@mtr:~$ sudo dpkg-reconfigure wireshark-common mahidul@mtr:~$ sudo usermod -a -G wireshark $USER mahidul@mtr:~$ sudo reboot Reference: http://it-connects.co/wireshark-not-listing-interfaces-on-ubuntu-12-04-precise-pangolin/ Using...

Friday, June 13, 2014

Burning CD/DVD using CLI in linux (redhat/debian/ubuntu)

Burning CD/DVD using CLI: 1. find cdrom/dvdrom 2. make an iso     i. create an iso     ii. create an iso from collecting data from diffrent location     iii. add new data to an existence iso 3. burn the disk (cd/dvd)     i. single session burning     ii. Multi-session burning     iii. Blank a disk for re-writing cd/dvd (re-writable disk) 1. First findout the cd drive. Here my cd/dvd rom is dev=1,0,0 root@mahidul:~# cdrecord --devices wodim: Overview of...

Monday, June 2, 2014

Install and Configure Hudson in redhat 6.x

Install and Configure Hudson in redhat 6.x Packages Requirements: . Java . Apache . Apache-tomcat Installing java: Download the leatest java from http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html#jdk-7u10-oth-JPR [root@hudson~]# mkdir -p /usr/jdk [root@hudson~]# tar -zxvf /Packages/jdk-7u10-linux-x64.tar.gz -C /usr/jdk/ [root@hudson~]# ls /usr/jdk/jdk1.7.0_10/ Installing Apache2: [root@hudson~]#...