无法在Ubuntu上运行Cassandra服务器。权限拒绝错误

我可以在ubuntu上安装cassandra，但在执行以下命令时 巴拉那是用户

paranjai@ubuntu：~$/etc/init.d/cassandra start

收到以下错误

cat:/var/run/cassandra.pid:权限被拒绝无法为用户“cassandra”设置组id 验证用户“cassandra”时出错 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝 cat:/var/run/cassandra.pid:权限被拒绝

感谢您的帮助。谢谢使用sudo:

sudo /etc/init.d/cassandra start

使用sudo：

sudo /etc/init.d/cassandra start