CENTOS 7 安装Transmission-daemon

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Step 1. First, you need to enable EPEL repository on your system.

yum install epel-release
yum -y update

Step 2. Installing Transmission.
Just run the following command to install Transmission:

yum install transmission-cli transmission-common transmission-daemon

Once complete, you can verify Transmission is installed by running the below command:

systemctl start transmission-daemon.service
systemctl stop transmission-daemon.service

Step 3. Configuration Transmission.
Edit the transmission settings.json config file:

nano /var/lib/transmission/.config/transmission-daemon/settings.json

OK now let’s edit the settings (to your liking) and don’t forget to save.

"rpc-authentication-required": true,
"rpc-enabled": true,
"rpc-password": "mypassword",
"rpc-username": "mysuperlogin",
"rpc-whitelist-enabled": false,
"rpc-whitelist": "0.0.0.0",

After editing and saving the settings.json file, start the transmission daemon:

systemctl start transmission-daemon.service

Step 4. Accessing Transmission.
Transmission BitTorrent Client will be available on HTTP port 9091 by default. Open your favorite browser and navigate to http://yourdomain.com:9091 or http://server-ip:9091. You should be greeted with the Transmission WebUI. After logging in, you will notice that the value for the rpc-password inside the settings.json file will be hashed. If you are using a firewall, please open port 80 to enable access to the control panel.

trouble shooting

在客户端访问服务端的 9091 端口打不开

检查 firewalld 是否启动，需要检查 tcp 9091 端口是否放行。注意 transmission 需要在一个端口（默认51413）监听，必须在 firewalld 中放行 tcp、udp 的这个端口。
sudo firewall-cmd --permanent --add-service=transmission-client,
这个 transmission-client 估计是在安装 transmission 的时候自动创建的。
检查本机的 9091 端口是否在 listening ss -lnp | grep 9091

修改下载路径到 /home/red/transmission

• add red to the transmission group

sudo usermod -a -G transmission red

• change the folder ownership

sudo chgrp -R transmission /home/red/transmission/

• grant write access to the group

sudo chmod -R 770 /home/red/transmission/

• Stop the deamon with

sudo systemctl stop transmission-daemon.service
The last thing to do is change the file creation mask, so that the downloaded files would be writeable by red.
sudo vim /var/lib/transmission/.config/transmission-daemon/settings.json
and change "umask": 18 to "umask": 2.
start tranmission-daemon
sudo sudo systemctl start transmission-daemon.service

修改 setting.json 设置默认下载路径

修改下面两个地方 修改配置需要提前 stop transmission-daemon

"download-dir": "/home/red/transmission",
"incomplete-dir": "/home/red/transmission",