bash, file read, loop, work

bash-file-read-and-work.sh

#!/bin/bash

k=1
input="t1"
while IFS= read -r var
do
    echo "$k ]"
    echo "$var"
    cat "$var"
    wc -l "$var"
    echo "------------------------------------------------------"
    (( k = k + 1 ))
done < "$input"

# ---------------------------

#!/bin/bash

k=1
n_stt=200
n_end=250
input="f_list.txt"

rm test-files.txt train-files.txt

while IFS= read -r var
do
	if (( k > n_stt && k <= n_end  )); then
		echo "$k is test"
                echo $var >> test-files.txt
        else
		echo "$k is train"
                echo $var >> train-files.txt
        fi
    (( k = k + 1 ))
done < "$input"


# file remove that it has not current dir
#
#!/bin/bash


files=`ls *.jpg | cut -c 1,-24 | awk '{print "../seg-caries/" $1 "_all.png" }'`

for f in $files
do
    if [ ! -f "$f" ]; then
        del_f=`echo $f  | cut -c 15-38 | awk '{print "./" $1 ".jpg"}'`
        rm -f $del_f
        echo "del $del_f"
    fi
done

file read jpg and png and make merge list has .txt

$ cat test1.sh
#!/bin/bash

ppp="/label"
k=1
for file in *.{jpg,png}
do
#echo $file
if [ -f "${file:0:15}txt" ]
then
#echo "Good $k ==> $file"
echo "$ppp/$file" >> all_file.data
((k = k+1))
fi
done