The basic uses of `sed` command are explained in this tutorial by using 50 unique examples. https://www.tutorialspoint.com/sed/sed_regular_expressions.htm A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipeline). If you want to match a literal parenthesis you can escape it with a \. Input: this string contains (parentheses) Desired output: this string contains parentheses. In this article, let us review some interesting workarounds with the “s” substitute command in sed with several practical examples. Splunk, Splunk>, Turn Data Into Doing, Data-to-Everything, and D2E are trademarks or -->/<\1>/' File.XML Here, the -r enables extended regular expression syntax so we can use to capture a group (without needing to escape the parentheses) and then refer to the captured text as \1. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. ’, ‘ + ’, parentheses, and braces (‘ {} ’). Tag: regex,sed. I know square brackets have special meaning in a regex so I'm escaping them by prepending with a backslash. A sed program consists of one or more sed commands, passed in by one or more of the -e, -f, --expression, and --file options, or the first non-option argument if none of these options are used. I am trying to convert "(A=hi) OR (B=bye)" to "(A=hi) NOT (B=bye)" using sed. And, if you DID need to include the parenthesis, you only need to escape them in the first half of the sed command (the match part). I know it looks funny but it does work. Ie. names, product names, or trademarks belong to their respective owners. But this commands performs all types of modification temporarily and the original file content is not changed by default. You don't need to use any special space characters unless you really need to (i.e. In general, sed operates on a stream of text that it reads from either standard input or from a file.This means that you can send the output of another command directly into sed for editing, or you can work on a file that you've already created.You should also be aware that sed outputs everything to standard out by default. I wanted to know if there was a way to match all of those variations with one regex. So regexes are only used in the first part of the sed, not both parts ! I tried sed, sed 's/>\ \(. NOTES. All other brand Thanks, but that wasn't my question; I already know how to escape parentheses. So far I have the following command: This gives me the following error, since apparently the backslash isnt enough to escape the parentheses: Error in 'rex' command: Regex: missing closing parenthesis. Parentheses can be used to group items into a single logical item. sed -i -r 's/