automatically modified aria2.conf’s bt-tracker value with "https://cdn.jsdelivr.net/gh/ngosang/trackerslist/trackers_best.txt" when startup (sleep several seconds for internet connection, recomended)

gistfile1.txt

#!/usr/bin/env bash
# set -euo pipefail

# aria2
# aria2c --conf-path=/home/wd/.aria2/aria2.conf -D

# update tracker list
# last_run_timestamp=Fri Nov 20 09:25:58 PM CST 2020
tracker_lists=`curl https://cdn.jsdelivr.net/gh/ngosang/trackerslist/trackers_best.txt | grep -v '^\s*$' | sed ":a;N;s/\n/,/g;$!ba"`
# echo $tracker_lists
if [ -n "$tracker_lists" ]; then
    echo $tracker_lists
    sed -i "/^bt-tracker=*/cbt-tracker=$tracker_lists" /home/wd/.aria2/aria2.conf
    sed -i "/^# last_run_timestamp*/c# last_run_timestamp=`date`" /home/wd/.aria2/aria2.conf
    sed -i "/^# last_run_timestamp*/c# last_run_timestamp=`date`" /home/wd/.config/autostart-scripts/aria2.sh
fi

# if process aria2c exist, then kill it
is_aria2c_exist=`ps -ef | grep -m 1 aria2 | grep -v "grep" | wc -l`
if [ "$is_aria2c_exist" != "0" ]; then
    pid=`ps -ef | grep -m 1 aria2c | awk '{print $2}'`
    kill $pid
    # killall aria2c
fi

sleep 0.5
aria2c --conf-path=/home/wd/.aria2/aria2.conf -D