To install the PCRE (Perl 5 Compatible Regular Expression) library on a Debian-based Linux system, such as Ubuntu, you can use the apt-get or apt command.
To install the PCRE library using apt-get, run the following command:
sudo apt-get install libpcre3-dev
To install the PCRE library using apt, run the following command:
sudo apt install libpcre3-dev
This will install the PCRE library and the necessary development files, including header files and static libraries, which you can use to build software that uses PCRE.
If you are using a different package manager, such as yum on CentOS or dnf on Fedora, you can install the equivalent package for your system. For example, on CentOS you can run the following command:
sudo yum install pcre-devel
and on Fedora you can run the following command:
sudo dnf install pcre-devel