Shell Programming and Scripting

cp a/x.csv b/x.csv
if [ $? -ne 0 ]; then
count it as 1

cp a/d.csv b/f.csv

if [ $? -ne 0 ]; then
count it as 2( Incrementing the error count)

mv b/x.csv b/vin.csv
if [ $? -ne 0 ]; then
count it as 3( Incrementing the error count)

mv b/f.csv b/test.csv
if [ $? -ne 0 ]; then
count it as 3( Incrementing the error count)

If total error count is greater than 2 then 
Exit 1

#!/bin/bash

COUNT=0

cp a/x.csv b/x.csv 2>/dev/null
(( $? != 0 )) && (( COUNT++ ))

cp a/d.csv b/f.csv 2>/dev/null
(( $? != 0 )) && (( COUNT++ ))

mv b/x.csv b/vin.csv 2>/dev/null
(( $? != 0 )) && (( COUNT++ ))

mv b/f.csv b/test.csv 2>/dev/null
(( $? != 0 )) && (( COUNT++ ))

(( COUNT > 2 )) && exit 1

exit 0

count=0
cp a/x.csv b/x.csv || count=$((count + 1))
cp a/d.csv b/f.csv || count=$((count + 1))
mv b/x.csv b/vin.csv || count=$((count + 1))
mv b/f.csv b/test.csv || count=$((count + 1))
exit $((count > 2))