將一列數據用逗號隔開合併成一行數據

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#!/bin/bash

for i in `seq 1 10`;do echo $i;done > ./test.txt

while read line;do var="$var,$line";done < test.txt

echo $var|sed 's/^,//g;s/,$//g'

1,2,3,4,5,6,7,8,9,10