注意：以下の記事を参考にされ、問題が生じた場合、責任は負いかねます。
I am a Manjaro linux user (one of Arch linux clone). So I use Arch tools, following setup.
aria2p : download helper. CLI tool using python.
Command-line tool and Python library to interact with an aria2c daemon process through JSON-RPC.
Aria2を利用した軽量なdownload toolです。
Aria2の利用者で、vimmerのような人たちに興味を持って頂けそうな気がします。
開発は最近なのか、関心が薄いのか、netであまり取り上げられいません。
1. まずAria2から
aria2 は軽量なマルチプロトコル&マルチソースのコマンドラインダウンロードユーティリティです。HTTP/HTTPS, FTP, BitTorrent, Metalink をサポートしています。aria2 はビルトインの JSON-RPC と XML-RPC インターフェイスで操作することができます。
https://wiki.archlinux.jp/index.php/Aria2#.E5.8F.82.E7.85.A7
Aria2 is one of best download utility. It can download files not only from web, but also from torrent or metalink and etc.
If you use Aria2 as daemon, you can download files on background and also use it from remote PCs.
2. aria2p sample screen shot
There are many download helpers usig aria2. But most of them use GUI.
But aria2p runs on terminal as CLI tools and very light. I love it. 
Here is a sample gif movie of aria2p from its git page.
3. Aria2. install & setup
I am a Manjaro linux user (one of Arch linux clone). So I use Arch tools, following setup.
3-1. install Aria2
yay -S aria aria2c-daemon
3-2. Aria2 run as daemon
Create download directory & permission 777, because Aria-daemon can save files there.
Aria-daemon runs as user=aria2c, group=aria2c.
## create a directory somewhere. Here is sample.
mkdir -p aria_dw
chmod 777 aira_dw
3-3. Edit config.
sudo vim /etc/conf.d/aria2c.conf
.....
## download dirctory
## set permission 777
dir=aria_dw
## set RPC token
rpc-secret=hoge # exchange "hoge" to others, for security.
....
## set proxy, if needed.
#all-proxy=http://127.0.0.1:3128
## other setting, if needed.
....
3-4. run Aria2 as daemon using systemctl
sudo systemctl enable --now aria2cd
confirm
sudo systemctl status aria2cd
● aria2cd.service - aria2c Service
Loaded: loaded (/etc/systemd/system/aria2cd.service; disabled; preset: disabled)
Active: active (running) since .......
Invocation: fed87108916a4e95a3b546ee6d2bc1d5
Process: 16556 ExecStart=/usr/bin/aria2c -D --conf-path=${ARIA2C_CONF} --save-session-interval=180 >
Main PID: 16557 (aria2c)
Tasks: 1 (limit: 76947)
Memory: 10.7M
CPU: 804ms
CGroup: /system.slice/aria2cd.service
└─16557 /usr/bin/aria2c -D --conf-path=/etc/conf.d/aria2c.conf --save-session-interval=180>
.... systemd[1]: Starting aria2c Service...
.... systemd[1]: Started aria2c Service.
for test, aria2c run as daemon from user.
if you need an aria2c instance quickly, run the following command:
aria2c --enable-rpc --rpc-listen-all --rpc-secret=hoge
4. aria2p. install & set up
4-1. set up python local environmnet, using pyenv.
aria2p pkg exists in Arch's AUR, but not work...
So I have to use python local environment.
You can use other utils, not pyenv. But I do not know it works or not.
## install pyenv.
yay -S pyenv
pyenv install 3.7.6 # aria2p may work on 3.8.10 not 3.7.6.
4-2. install aria2p
use 3.7.6 here, but newer python version might be OK.
pyenv local 3.7.6
pip install aria2p[tui]
4-3. find path of aria2p & create alias
which aria2p
$HOME/.pyenv/versions/3.7.6/bin/aria2p
create alias
options are explained at git page
alias aria2p=' $HOME/.pyenv/versions/3.7.6/bin/aria2p -s hoge
alais aa0=' aria2p'
## connect Aria2c running on remote PC (192.168.1.254)
aaa(){ $HOME/.pyenv/versions/3.7.6/bin/aria2p -H http://192.168.1.254 -s hoge}
## add download file links to aria-daemon.
aab() { echo "aria2p add\n" ;
$HOME/.pyenv/versions/3.7.6/bin/aria2p -H http://192.168.1.254 -s hoge add "$@"
&& aaa}
4-4. sample for usage
add dowload link to Aria2c & start download using aria2c.
$HOME/.pyenv/versions/3.7.6/bin/aria2p -H http://192.168.1.254 -s hoge add\
http://host.robots.ox.ac.uk/pascal/VOC/voc2012/VOCtrainval_11-May-2012.tar
## or use alias
aab http://host.robots.ox.ac.uk/pascal/VOC/voc2012/VOCtrainval_11-May-2012.tar
sample screen shot
type F6, sort menu shows up at left.
5. menu screen
escape : cancel the menu and move top menu
F1, ? : help
space : toggle pause/ resume download
become "paused/active" inside the orage window.
F9, del : remove download, and choose delete files or not from this menu.
Links are removed, but saving files is not deleted on my PC, I should delete files later.
6. command options
aria2p -h
Global options:
-h, --help Show this help message and exit. Commands also accept
the -h/--help option.
-p PORT, --port PORT Port to use to connect to the remote server.
-H HOST, --host HOST Host address for the remote server.
-s SECRET, --secret SECRET
Secret token to use to connect to the remote server.
-L {TRACE,DEBUG,INFO,SUCCESS,WARNING,ERROR,CRITICAL}, --log-level {TRACE,DEBUG,INFO,SUCCESS,WARNING,ERROR,CRITICAL}
Log level to use
-P LOG_PATH, --log-path LOG_PATH
Log path to use. Can be a directory or a file.
-T CLIENT_TIMEOUT, --client-timeout CLIENT_TIMEOUT
Timeout in seconds for requests to the remote server.
Floats supported. Default: 60.0.
Commands:
add Add downloads with URIs/Magnets/torrents/Metalinks.
add-magnets (add-magnet)
Add downloads with Magnet URIs.
add-metalinks (add-metalink)
Add downloads with Metalink files.
add-torrents (add-torrent)
Add downloads with torrent files.
autopurge (autoclear)
Automatically purge completed/removed/failed
downloads.
call Call a remote method through the JSON-RPC client.
pause (stop) Pause downloads.
remove (rm, del, delete)
Remove downloads.
resume (start) Resume downloads.
show Show the download progression.
top Launch the top-like interactive interface.
listen Listen to notifications.
reference
aria2p git
aria2 manuual page
Aria2 from Arch page
aria2c-daemon from AUR
aria2p AUR but not work
b1337xyz's cofigs
b1337xyz's script