Always keep in mind what the purpose of the graphic is. When you hit a quality level that is unsatisfactory, then back up to the lowest level that was still good enough for your purposes. If the reduced level looks good enough, then try another reduction. One strategy for selecting the best level is to start with a fairly high quality setting and if it looks OK, try reducing the quality a bit.
You should always select the lowest quality that is still suitable for your purpose. Or you might be asked to select a percentage from 0% (lowest quality) to 100% (highest quality). You might be given a number range, for example 0 (lowest quality) to 12 (highest quality). You might just see a few choices like: low, medium, high, or maximum. When you export to JPG from an image editing program, you’ll be prompted to select the quality level you want. It’s easiest to compress a JPG (also called JPEG) because there’s just one thing to consider: quality. For information about compressing PNGs or GIFs, please scroll down this page.
We’ll take a look at how to get the best compression in each of the three file types starting with JPEGs. If you have a simple graphic with few colors and solid areas, then your best choice will be a GIF or PNG-8. If a similar photo needs to have lossless compression or transparent areas, then a PNG-24 will be required. If your image is a photo with lots of colors or an illustration with gradations and you want to squeeze the file size down, JPEG will probably be your best choice. The more compression, the smaller the file will be and the faster it will load on a webpage.īut first, you’ll need to decide which of the three file formats you want to use. In most image editing applications this is done by the selections you make in the “Save As” or “Export As” dialog box when saving a PNG, JPG, or GIF. Use the feedback form below to ask any questions or share your comments with us.The primary way to reduce the file size of an image is by increasing the amount of compression. That’s all for now! Always remember that the first step to getting your own SSL certificate from a CA is to generate a CSR. For more information about OpenSSL command, see its man page: $ man openssl Then follow the rest of the instructions to initiate activation of your SSL certificate. In this example, we created a CSR for a multiple domain certificate purchased from Namecheap. Then in a window such as the one below, paste your CSR in the correct input field. Then go back to your CA’s website, log in, go to the page will contain the SSL certificate you purchased, and activate it. Generate CSR in LinuxĪfter creating your CSR, view the contents of the file using a cat utility, select it and copy it. This information is critically checked by the CA before issuing your certificate.
Note that your answers should match information in legal documents regarding the registration of your company. -out specifies the filename to write the CSR to.Īnswer correctly, the questions you will be asked.-keyout specifies the filename to write on the created private key.-newkey rsa:2048 creates a 2048-bit RSA key.req enables the part of OpenSSL that handles certificate requests signing.
$ openssl req -new -newkey rsa:2048 -nodes -keyout -out Then issue the following command to generate a CSR and the key that will protect your certificate.
To create a CSR, you need the OpenSSL command line utility installed on your system, otherwise, run the following command to install it.
Creating a CSR – Certificate Signing Request in Linux In this article, we will demonstrate how to create a CSR ( Certificate Signing Request) on a Linux system. The first step towards acquiring an SSL certificate issued and verified by a CA is generating a CSR (short for Certificate Signing Request). On the other hand, for sensitive, public-facing production services, applications or websites, it is highly recommended to use a certificate issued and verified by a trusted CA.
They can be generated for free using OpenSSL or any related tool. Self-Signed Certificates are commonly used in test environments for LAN services or applications. SSL Certificates fall into two broad categories: 1) Self-Signed Certificate which is an identity certificate that is signed by the same entity whose identity it certifies-on signed with its own private key, and 2) Certificates that are signed by a CA ( Certificate Authority) such as Let’s Encrypt, Comodo and many other companies.