I got the error
"The PHP extension "apcu" must be installed and loaded in order to use the APCu backend"
in TYPO3.
Then I tried to install apcu by the following command.
sudo apt-get -y install gcc make autoconf libc-dev pkg-config
sudo pecl7.2-sp install apcu
On executing second command I got the error
"sudo: pecl7.2-sp: command not found".
Anyone please help me to solve this..