Bash - Scriptiing - for loop: rename files

#!/bin/bash
#
DIR=/home/kensipe/sbin/data.d/tmp

for file in $DIR/*.A
do
        mv "$file" "${file/.A/.B}"
done


Results:

[kensipe@localhost tmp]$ ls  -l
total 0
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.5o5P.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.aM48.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.JouO.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.Kt4W.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.msAl.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.NIAg.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.r82a.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.rhhO.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.roN3.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.sGjz.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.Wmmv.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.ZAlc.A
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.zwBy.A


[kensipe@localhost bash.d]$ ./rename1.sh
[kensipe@localhost bash.d]$


[kensipe@localhost tmp]$ ls  -l
total 0
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.5o5P.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.aM48.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.JouO.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.Kt4W.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.msAl.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.NIAg.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.r82a.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.rhhO.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.roN3.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.sGjz.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.Wmmv.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.ZAlc.B
-rw-------. 1 kensipe kensipe 0 Apr 10 16:38 file.zwBy.B