How To Install re2 on CentOS 7
Introduction
In this tutorial we learn how to install re2 on CentOS 7.
What is re2
RE2 is a C++ library providing a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. Backtracking engines are typically full of features and convenient syntactic sugar but can be forced into taking exponential amounts of time on even small inputs. In contrast, RE2 uses automata theory to guarantee that regular expression searches run in time linear in the size of the input, at the expense of some missing features (e.g back references and generalized assertions).
We can use yum or dnf to install re2 on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install re2.
Install re2 on CentOS 7 Using yum
Update yum database with yum using the following command.
sudo yum makecache
After updating yum database, We can install re2 using yum by running the following command:
sudo yum -y install re2
Install re2 on CentOS 7 Using dnf
If you don’t have dnf installed you can install DNF on CentOS 7 first.
Update yum database with dnf using the following command.
sudo dnf makecache
After updating yum database, We can install re2 using dnf by running the following command:
sudo dnf -y install re2
How To Uninstall re2 on CentOS 7
To uninstall only the re2 package we can use the following command:
sudo dnf remove re2
References
Summary
In this tutorial we learn how to install re2 on CentOS 7 using yum and dnf.
