ubuntu
添加Nginx官方的源：

sudo tee /etc/apt/sources.list.d/nginx.list << EOF
deb http://nginx.org/packages/mainline/ubuntu `lsb_release -cs` nginx
deb-src http://nginx.org/packages/mainline/ubuntu `lsb_release -cs` nginx
EOF

添加Nginx的公钥：

wget http://nginx.org/keys/nginx_signing.key
sudo apt-key add nginx_signing.key

sudo apt update
sudo apt install nginx

阅读全文

编辑配置文件
vim /usr/lib/systemd/system/mbsapi.service

阅读全文

错误描述：Permission denied: user=dr.who, access=WRITE, inode="/":hadoop:supergroup:drwxr-xr-x

我们可以通过修改core-site.xml，配置为当前用户

<property>

    <name>hadoop.http.staticuser.user</name>

    <value>hadoop</value>

</property>

阅读全文

将新的hosts文件拷贝到其它三台服务器中

scp /etc/hosts root@slave1:/etc
scp /etc/hosts root@slave2:/etc
scp /etc/hosts root@slave3:/etc

实现免登

scp ~/.ssh/id_dsa.pub hadoop@slave3:~/.ssh/master.pub
ssh hadoop@slave3 "cat ~/.ssh/master.pub>> ~/.ssh/authorized_keys"

阅读全文