Author: Rumi

Hasan T. Emdad is an ICT Solution Architect, Project Manager with 12+ year expertise in HW selection, OS expertise on Linux and MS, Supervising Application SW on Pearl, Java, dot Net and PHP with DB experience of MySQL, Postgre, MS and Oracle. He was involved in setting up several Turn Key ICT including Telecom based projects on various government and autonomous bodies in the country. Developed more than 50 applications running with different operators and users. Managing a team of more than 10 in-house engineers and developers and manages an outsourcing team experts and contributors. Very recently engineered Public Key Infrastructure (PKI) on Enterperise and Root Certifying Authority and deployed scalable Cloud Computing and Managed Services. He has post graduated (MBA) from University of Dhaka, Bangladesh.

Linux service restart shell script

Rumi, November 29, 2013November 29, 2013

I badly needed a script that would check if my running services (in this script it'll check varnish and apache2 services) are alive- if not, it'll restart the dead service and write a log. Pretty handy!

Using the DIV tag to display columns rather than tables

Rumi, November 15, 2013

The TABLE element may be a convenient way of producing stable layouts, but the W3C WAI guidelines are pretty clear that tables are for displaying tabular information, not for arranging page content. The DIV element is used as the basic layout element as it does not add any extra meaning…

.htaccess URL redirect

Rumi, November 13, 2013

# This allows you to redirect your entire website to any other domain Redirect 301 / http://mt-example.com/ # This allows you to redirect your entire website to any other domain Redirect 302 / http://mt-example.com/ # This allows you to redirect index.html to a specific subfolder Redirect /index.html http://example.com/newdirectory/ # Redirect…

OpenFiler Installation On Headless NAS

Rumi, November 12, 2013

So, you have a Dell 715N nas or similar and wish to install OpenFiler onto it? This nas is headless, it has no USB ports, no CDROM, no floppy. It’s only connection to the outside world is it’s serial port and it’s network interfaces (2). You may or may not…

Nginx wordpress fancy URL or permalink fixing

Rumi, November 12, 2013

If your wordpress is installed in the root directory i.e. yourdomain.com, you can use the following directives- location / { try_files $uri $uri/ /index.php?$args; } # Add trailing slash to */wp-admin requests. rewrite /wp-admin$ $scheme://$host$uri/ permanent; location ~* \.(jpg|jpeg|png|gif|css|js|ico)$ { expires max; log_not_found off; } Or if your wordpress is…

Reset the root password in Debian or Ubuntu

Rumi, November 9, 2013

In order to boot into the recovery mode on Debian or Ubuntu, hold down SHIFT key after powering on your Linux machine. You will then be presented with GRUB menu. Select “recovery menu” option by pressing down arrow key. Do not press ENTER at this point, but rather press “e”…

NTP Adjust date on Linux

Rumi, October 27, 2013December 8, 2013

If you want to set date/time on linux manually (instead of using synchronization like ntp) you may use the date command to do it. Login as root and run the following command, it will show you the current date/time. [root@servername ~]# date Output will be like Tue Aug 23 12:32:22…

Install nginx using yum on CentOS or SL Linux

Rumi, October 25, 2013

Step #1: Install nginx repo Type the following wget command to install nginx yum configuration file: # cd /tmp CentOS Linux v6.x user type the following command: # wget http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm # rpm -ivh nginx-release-centos-6-0.el6.ngx.noarch.rpm RHEL v6.x user type the following command: # wget http://nginx.org/packages/rhel/6/noarch/RPMS/nginx-release-rhel-6-0.el6.ngx.noarch.rpm # rpm -ivh nginx-release-rhel-6-0.el6.ngx.noarch.rpm

Install Munin-node on RHEL or CentOS 6 or Scientific Linux 6

Rumi, October 25, 2013

rpm -Uvh http://ftp.uninett.no/linux/epel/6/x86_64/epel-release-6-8.noarch.rpm yum install perl-XML-SAX yum install munin-node And voila!

Install htop on CentOS 5 or 6

Rumi, October 25, 2013

Install RPM for CentOS 5.x 32-BIT wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el5.rf.i686.rpm rpm -Uhv rpmforge-release*.rf.i386.rpm 64BIT wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el5.rf.x86_64.rpm rpm -Uhv rpmforge-release*.rf.x86_64.rpm Install RPM for CentOS 6.x 32-BIT wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.i686.rpm rpm -Uhv rpmforge-release*.rf.i386.rpm 64BIT wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm rpm -Uhv rpmforge-release*.rf.x86_64.rpm Install htop in CentOS Using YUM Once the repository is installed, all you need to do…