Redirect file

If you do not know how to create a backup, check out our step-by-step guide. You can either create one or use a dedicated plugin. To modify our functions. Those are the old and the new slug. These values will act as your from and to URL, so you should customize them. After customizing the code with your own slugs, save the changes and activate the snippet. From now on, visitors will be redirected to the destination link.

Above, we have shown you how to redirect a page in WordPress. But what if you want to add multiple redirections to your page?

You can add various options by including an if conditional in the snippet. For example, have a look at the snippet below:. Make sure you update the snippet after modifying it. This way, you can use the Code Snippets plugin to redirect a WordPress page. First, you need to access the. If you have access to the WordPress dashboard, using a file manager is the easiest option. In this tutorial, we will use a plugin called File Manager. By default, you will see the. Now, the plugin will download the file to your local computer.

After that, select the Code Editor option to start editing and customizing the. When someone lands on the old-url permalink , they will be immediately redirected to new-url slug.

Simply adjust the code according to your requirements. Similar to what we saw above, you can add multiple redirection options by using if conditionals.

Now when someone enters the old URL in a browser, the. You can test it by entering the old URL using an incognito window in your browser. In this case, the server can send back a See Other response for a URL that will contain the right information.

If the reload button is pressed, only that page is redisplayed, without replaying the unsafe requests. In this case, the response is a See Other redirect that links to a page indicating that the action has been scheduled, and eventually informs about its progress, or allows to cancel it. Redirects can be set either in the server config file or in the. RedirectMatch does the same, but takes a regular expression to define a collection of affected URLs:.

If you don't want a temporary redirect, an extra parameter either the HTTP status code to use or the permanent keyword can be used to set up a different redirect:. It is more flexible, but a bit more complex. To apply a redirect to a directory or only certain pages, use the rewrite directive:.

Redirection loops happen when additional redirections follow the one that has already been followed. In other words, there is a loop that will never be finished and no page will ever be found.

Most of the time this is a server problem, and if the server can detect it, it will send back a Internal Server Error. If you encounter such an error soon after modifying a server configuration, this is likely a redirection loop. Sometimes, the server won't detect it: a redirection loop can spread over several servers which each don't have the full picture.

In this case, browsers will detect it and display an error message. Firefox displays:. Firefox has detected that the server is redirecting the request for this address in a way that will never terminate. In both cases, the user can't do much unless corruption is happening on their side, like a mismatch of cache or cookies. There are several types of redirects, sorted into three categories: Permanent redirections Temporary redirections Special redirections.

Others may or may not be changed to GET. Others changed to GET body lost. Better than when non- GET operations are available on the site. Indicates that the cached response is still fresh and can be used. Here we will pipe the output of the stat command into grep to pull only last modified time of the file.

The stat commands output enters the pipe and passed to grep for processing. When grep finishes processing the data, it sends the output to standard output stdout. Standard error stderr is the destination for all error messages from a process.

By default, this is the display screen but just like standard out, it can be redirected. Mistyping will certainly lead to an error displayed on the screen if you use the command line often. This is an example of standard error stderr. Just like the other streams, you can redirect stderr to a file. Often used in scripting, but handy to know for anyone using the command line.

But this time, we have to specify that we want to redirect stderr by using the file descriptor. As shown in the table and diagram above, the file descriptor for stderr is 2. So we would redirect it like so:. As we discussed in the stdout section, using the single bracket redirection will result in overwriting any data that is currently in the file.

You cannot directly pipe stderr to another command. This is by design to allow for complete error reporting. Here is an example of trying and failing to pipe stderr into grep.

However, as with most things Linux, there are multiple ways to accomplish the same task. You can redirect stderr to stdout using their file descriptors, then pipe it through grep. Non-Standard redirection requires file descriptors. Below we will outline some additional redirects using file descriptors. File descriptors are used to redirect streams. However, you can do a lot more with file descriptors, much more than we will cover here.

The intention of this section is to give you a elementary understanding of file descriptors and making you comfortable with their basic usage. The above command sends stdout File Descriptor 1 to ouput. We can verify by reading those files. You can redirect both stderr and stdout to a single file if you wish.

For this we can either redirect stderr to stdout, then stdout to a file like so:. Either command produces the same result, all stdout and stderr were sent to the alloutput. If you are writing a script and want to redirect data streams without appending the redirect operator or every line, you can use the exec command like this.

Knowing the standard streams, file descriptors and redirection are an important part of being proficient on the command line. In this article we covered a lot but still only scratched the surface.