try

1.sh

@@ -0,0 +1,7 @@
+while read line 
+do 
+	if [[ $line == *"HACK"* ]]
+	then
+		echo "Found at line $line"
+	fi
+done < file.txt	

2.sh

@@ -0,0 +1,8 @@
+while read line 
+do
+       if [[ $line == *"1234567890"* ]]
+       then
+		echo found at line $line
+       fi		
+done < file.txt	
+

3.sh

@@ -0,0 +1,8 @@
+while read line
+do
+	if [[ $line == *"ftp"* ]]
+	then
+		echo found at line = $line
+	fi
+done < file.txt
+

4.sh

@@ -0,0 +1,8 @@
+while read line
+do
+	if [[ $line == *"hackIT"* ]]
+	then
+		echo found at line = $line
+	fi
+done < file.txt
+

Assignment_1/210357_Divyansh/1.sh

@@ -0,0 +1,7 @@
+while read line 
+do 
+        if[[ $line == *"HACK"* ]] 
+        then
+                echo "found at line = $line"
+        fi
+done < file.txt

Assignment_1/210357_Divyansh/2.sh

@@ -0,0 +1,7 @@
+while read line 
+do 
+        if[[ $line == *"0123456789 "* ]] 
+        then
+                echo "found at line = $line"
+        fi
+done < file1.txt

Assignment_1/210357_Divyansh/3.sh

@@ -0,0 +1,7 @@
+while read line
+do
+        if [[ $line == *"ftp"* ]]
+        then
+                echo "found at line = $line"
+        fi
+done < file1.txt

Assignment_1/210357_Divyansh/4.sh

@@ -0,0 +1,7 @@
+while read line
+do
+        if [[ $line == *"hackIT"* ]]
+        then
+                echo "found at line = $line"
+        fi
+done < file1.txt