> ls -l
total 16
drwxrwx---  2 xxx dp  512 Oct 24 08:56 ./
drwxrwx--- 99 xxx dp 3072 Oct 24 08:48 ../
-rw-rw----  1 xxx dp    0 Oct 24 08:53 LG_JG_CLIENT_20081024114245_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:56 LG_JG_CLIENT_200810241142_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:55 LG_JG_CLIENT_baddata.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LG_JG_CUSTOMER_20081024114245.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LG_JG_CUSTOMER_20081024114245_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LM_CM_CUSTOMER_20081024114245_2.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:48 LM_CM_TELEPHONE_20081024114245_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:48 LM_CM_TELEPHONE_20081024114245_2.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:48 LM_CM_TELEPHONE_20081024114269_3.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LM_JG_CUSTOMER_20081024114245_1.txt
> ls -l | grep "[A-Z]*_[A-Z]*_[A-Z]*_[0-9]\{14\}*_[0-9]*.txt"
-rw-rw----  1 xxx dp    0 Oct 24 08:53 LG_JG_CLIENT_20081024114245_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LG_JG_CUSTOMER_20081024114245_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LM_CM_CUSTOMER_20081024114245_2.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:48 LM_CM_TELEPHONE_20081024114245_1.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:48 LM_CM_TELEPHONE_20081024114245_2.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:48 LM_CM_TELEPHONE_20081024114269_3.txt
-rw-rw----  1 xxx dp    0 Oct 24 08:49 LM_JG_CUSTOMER_20081024114245_1.txt
>