ls ll with regular express

#!/bin/bash

for f in $(ls | egrep 'mysql-bin.0[0-9]{5}$')
do
echo "process file: $f"
done



[root@localhost recovery]# ll mysql-bin.0[0-9][0-9][0-9][0-9][0-9]
-rw-r----- 1 root root 23022429 Feb 23 06:13 mysql-bin.000001
-rw-r----- 1 root root 456769 Feb 23 06:13 mysql-bin.000002
-rw-r----- 1 root root 47295 Feb 23 06:13 mysql-bin.000003
-rw-r----- 1 root root 679680 Feb 23 06:13 mysql-bin.000004
-rw-r----- 1 root root 1742441 Feb 23 06:13 mysql-bin.000005
-rw-r----- 1 root root 5671825 Feb 23 06:13 mysql-bin.000006
-rw-r----- 1 root root 5588178 Feb 23 06:13 mysql-bin.000007
-rw-r----- 1 root root 5312684 Feb 23 06:13 mysql-bin.000008
-rw-r----- 1 root root 5569825 Feb 23 06:13 mysql-bin.000009
-rw-r----- 1 root root 5653535 Feb 23 06:13 mysql-bin.000010
-rw-r----- 1 root root 5361382 Feb 23 06:13 mysql-bin.000011
-rw-r----- 1 root root 5722384 Feb 23 06:13 mysql-bin.000012
-rw-r----- 1 root root 5759352 Feb 23 06:13 mysql-bin.000013
-rw-r----- 1 root root 6006372 Feb 23 06:13 mysql-bin.000014
-rw-r----- 1 root root 5645165 Feb 23 06:13 mysql-bin.000015
-rw-r----- 1 root root 5508167 Feb 23 06:13 mysql-bin.000016
-rw-r----- 1 root root 6258305 Feb 23 06:13 mysql-bin.000017
-rw-r----- 1 root root 5959473 Feb 23 06:13 mysql-bin.000018
-rw-r----- 1 root root 5743501 Feb 23 06:13 mysql-bin.000019
-rw-r----- 1 root root 5618976 Feb 23 06:13 mysql-bin.000020
-rw-r----- 1 root root 4157667 Feb 23 06:13 mysql-bin.000021
[root@localhost recovery]# ll | egrep "mysql-bin.0[0-9]{5}$"
-rw-r----- 1 root root 23022429 Feb 23 06:13 mysql-bin.000001
-rw-r----- 1 root root 456769 Feb 23 06:13 mysql-bin.000002
-rw-r----- 1 root root 47295 Feb 23 06:13 mysql-bin.000003
-rw-r----- 1 root root 679680 Feb 23 06:13 mysql-bin.000004
-rw-r----- 1 root root 1742441 Feb 23 06:13 mysql-bin.000005
-rw-r----- 1 root root 5671825 Feb 23 06:13 mysql-bin.000006
-rw-r----- 1 root root 5588178 Feb 23 06:13 mysql-bin.000007
-rw-r----- 1 root root 5312684 Feb 23 06:13 mysql-bin.000008
-rw-r----- 1 root root 5569825 Feb 23 06:13 mysql-bin.000009
-rw-r----- 1 root root 5653535 Feb 23 06:13 mysql-bin.000010
-rw-r----- 1 root root 5361382 Feb 23 06:13 mysql-bin.000011
-rw-r----- 1 root root 5722384 Feb 23 06:13 mysql-bin.000012
-rw-r----- 1 root root 5759352 Feb 23 06:13 mysql-bin.000013
-rw-r----- 1 root root 6006372 Feb 23 06:13 mysql-bin.000014
-rw-r----- 1 root root 5645165 Feb 23 06:13 mysql-bin.000015
-rw-r----- 1 root root 5508167 Feb 23 06:13 mysql-bin.000016
-rw-r----- 1 root root 6258305 Feb 23 06:13 mysql-bin.000017
-rw-r----- 1 root root 5959473 Feb 23 06:13 mysql-bin.000018
-rw-r----- 1 root root 5743501 Feb 23 06:13 mysql-bin.000019
-rw-r----- 1 root root 5618976 Feb 23 06:13 mysql-bin.000020
-rw-r----- 1 root root 4157667 Feb 23 06:13 mysql-bin.000021