How to use a bash script in which the loop execution terminal Ming 'l-CodePudding

 
#!/bin/bash 
For num 1 2 3 in 
Do 
For char in 0 1 2 3 4 5 6 7 8 9 
Do 
Echo $num $char 
TrainDT="Lin" ${num} "train_" ${char} ". TXT "
TestDT="Lin" ${num} "val_" ${char} ". TXT "
The cat $train & gt; Ijcnn1tr. TXT 
The cat $testds & gt; Ijcnn1ts. TXT 
 CMD="./libFM - task r - method MCMC - train ijcnn1tr. TXT - test ijcnn1ts. TXT - iter 100 - dim '1,1,2 - out the output ${num} ${char}. LibFM "
` ${CMD} `  
The done 
The done

How to loop in a shell script execution CMD command? Use the source, Dan didn't succeed,