ls -lrt
drwxrwxrwx   2 do     ba            96 Feb 10 04:59 PC_03021001_MDS_RF_job
drwxrwxrwx   2 do     ba            96 Feb 10 05:02 PC_0011814_AVE_RF_1.5
drwxrwxrwx   2 do     ba            96 Feb 10 05:12 US_03029_AVE_RF_423.5
drwxrwxrwx   2 do     ba            96 Feb 10 05:24 AT_030_DAE_RF_4

##</code><code>##

chdir "/diro/col/PC*" or die" can't change";