Servers

SSH login without password using RSA key authentication

With RAS key authenticating mechanism, you can login (using SSH ) to a server without providing the password. RSA is an algorithm for public-key cryptography. This process is most suitable for working automated process. For automating backups or run some jobs frequently in a trusted server this will contribute an important role. And the other advantage of RSA key authentication …

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Server / Network Documentation with SYSID

Documentation is always tedious task for system administrators, especially there are 50’s and 100’s of servers. Recently I planned to document all my servers. After a long search I reached SYSID site, it is an open source, nice VB Script and python script for creating  decent looking documents,   It is very nice to document windows servers and desktops, The project …

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SQL express 2008 with 10 GB support

SQL Server Express is now available with 10 GB Storage support. Earlier it was supported only 4GB. Now most SOHO users can use Microsoft SQL Express for their applications. It is ideal for websites and web based applications. It is coming along with a SQL management tool, reporting capabilities, full-text search, and spatial support. Compatible with all editions of SQL …

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SSH windows server with copssh – OpenSSH

Copssh is an ssh server for windows operating systems, this application is based on Openssh and cygwin. OpenSSH is a free solution for SSH server. And Cygwin is a Linux-like environment for Windows, cygwin1.dll is giving the functionality of Linux. By implementing copssh we can access our windows servers in a secure way.

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NAT with Port forwarding on Sun Oracle Virtual box

In a Guest OS with NAT network, out going traffic will show the host IP address. we use this mainly for access something form the guest OS. But some times we want to access the guest OS from the network. Normal case this is not possible and will reach only up to the Host server. It is possible through a …

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GlassFish Performance Tunning

GlassFish is an application/web server for deploying Java based web application. To obtain best performance in production environment, some modification has to be made to the default GlassFish installation. Tip 1:  Java Version Typically, many performance optimizations are always being incorporated in newer releases of Java SE.  Whenever possible, it is a good idea to upgrade to  the latest version …

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Know the service running in a port – Linux

In our previous article we explained the steps for windows. Here you can find the steps to identify the service running in a port on linux . Here we used commands “fuser” and “PS”. I am using apache2 web server  on port 80. Replace your port number with 80 (my example with port 80 ) Run following command to find …

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Find which application/service is running in a port – Windows

Most of the applications are using standard ports, some cases user or application will assign different ports for the application. For example Port 80 is the default port for IIS, if you are trying to start a different web applications it will say error message like “port 80 already in use” . Or you start the third-party web application before …

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keytool IUI to manage SSL Certificate in Glassfish Web Server

To setup SSL in different java based web servers like Apache, Tomcat, Glassfish, we generally use the keytool command line to create certificate, generate CSR etc…,  which is a bit complicated and confusing if you are not well versed with the keytool command line, We can make our life much more easier, by using Keytool IUI which is GUI version …

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