Removing a sentence containing a word is a simple task when a correct regular expression is identified. This is just an exercise on solving similar problems.
sed is the best utility for making substitutions. Hence let's use
sed to replace the matched sentence with a blank.
Let's create a file with some text to carry out the substitutions. For example:
$ cat sentence.txt Linux refers to the family of Unix-like computer operating systems that use the Linux kernel. Linux can be installed on a wide variety of computer hardware, ranging from mobile phones, tablet computers and video game consoles, to mainframes and supercomputers. Linux is predominantly known for its use in ...