pecl 未找到命令

以安装swoole为例：#Ubuntu/Debian上是这样(php-pear包含pecl,php5-dev包含phpize,pecl依赖phpize)
apt-get install php-pear php5-dev pecl install swoole #CentOS/Redhat上应该是这样 yum install php-pear php-devel pecl install swoole #如果是自行编译的PHP(假设安装目录为/opt/php/7.0) /opt/php/7.0/bin/phpize /opt/php/7.0/bin/pecl