Editing line with sed in for loop from other file - bash

Question

im new in bash,
Im trying to edit line with sed with for loop from other file.
Please tell me what i doing wrong in my small code?
Do i missing another loop?
#!/bin/bash
# read and taking the line needed:
for j in `cat /tmp/check.txt`; do
# replacing the old value with and value:
sed -i "s+/tmp/old_name/+/${j}/+gi" file_destantion.txt$$
#giving numbers to the logs for checking
Num=j +1
# moving the changed file to .log number ( as for see that it is changed):
mv file_destantion.txt$$ file_destantion.txt$$.log$Num
#create ne source file to do the next value from /tmp/check:
cp -rp file_destantion.txt file_destantion.txt$$
done
On /tmp/check i have the info that i want to enter on each loop turn.
in /tmp/check:
/tmp/check70
/tmp/check70_1
/tmp/_check7007
In the end this is what i want it to be like:
.log1 > will contain /tmp/check70
.log2 > will contain /tmp/check70_1
.log3 will contain /tmp/check7007

Answer 1

I have found this solution worked for me.
#!/bin/bash
count=0
grep -v '^ *#' < /tmp/check | while IFS= read -r line ;do
cp -rp file_destantion.txt file_destantion.txt$$
sed -i "s+/tmp/old_name/+${line}/+gi" file_destantion.txt$$
(( count++ ))
mv file_destantion.txt$$ "file_destantion.txt$$.log${count}"
cp -rp file_destantion.txt file_destantion.txt$$
done
thank you very much #Cyrus for your guiding.