Every web hosting offers different support for applications, languages and operating systems. The two main operating systems are UNIX based and Windows based. Linux goes to the first category UNIX based operating systems. So if you want to run an application or script which requires a Linux environment you will need a Linux web hosting which is reliable, safe and can satisfy your needs. Of course the operating system is just one of the conditions of the web hosting different Linux web hosting also offer you different options and limits about bandwidth, hard disk space and customization.
When choosing a Linux web hosting you should carefully review all the extras it provides you with limit of bandwidth and hard disk space (may be unlimited), free domain names, shared or dedicated server and a lot of others but those are the most important. Of course if hard disk space is limited it will narrow the content you can post on your website thus making it less attractive and interesting. Limited bandwidth will restrict access to your website if exceeded, but it is strongly recommended to select a plan with unlimited bandwidth.
And the second most important extra is the shared or dedicated server. The shared Linux hosting means that the machine on which your website is hosted will also host the websites or applications of many other users thus lowering connection speed, compromising security and narrowing your access to directories and customization options! While the dedicated server is a bit more expensive it is for and only you to use. You will have full virtual access to the server and you will be able to run as many websites and applications on it without having to worry about any bandwidth or space limits. The full access will allow you to customize every available option on the server and hosting thus allowing you to create a hosting that is fully compatible with your ideas and needs. Offers that can provide you with exceptional performance, security and access. Depending on the plan you choose you will have different options to customize and limited or unlimited resources can be used for your website or application. And all those extras are provided to you with acceptable prices that anyone can pay.