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keep getting a shell error with el6 and el7

keep getting error if i execute the script directly.

bash: ./check_cpu_linux.sh: /bin/bash^M: bad interpreter: No such file or directory

if i comment out the shabang (#!/bin/bash) header. then i get this error.

./check_cpu_linux.sh
./check_cpu_linux.sh: line 36: $’r’: command not found
./check_cpu_linux.sh: line 38: $’r’: command not found
./check_cpu_linux.sh: line 40: $’r’: command not found
./check_cpu_linux.sh: line 46: $’r’: command not found
./check_cpu_linux.sh: line 58: $’r’: command not found
./check_cpu_linux.sh: line 63: $’r’: command not found
./check_cpu_linux.sh: line 68: $’r’: command not found
./check_cpu_linux.sh: line 70: syntax error near unexpected token `$'{r”
‘/check_cpu_linux.sh: line 70: `print_release() {