[ -f /var/log/old/$1.3 ] && mv /var/log/old/$1.3 /var/log/old/$1.4
[ -f /var/log/old/$1.2 ] && mv /var/log/old/$1.2 /var/log/old/$1.3
[ -f /var/log/old/$1.1 ] && mv /var/log/old/$1.1 /var/log/old/$1.2
[ -f /var/log/old/$1.3 ] && mv /var/log/old/$1.3 /var/log/old/$1.4
[ -f /var/log/old/$1.2 ] && mv /var/log/old/$1.2 /var/log/old/$1.3
[ -f /var/log/old/$1.1 ] && mv /var/log/old/$1.1 /var/log/old/$1.2