Renaming files using rename on the following files
rename 's/.99999/.99999.sac.pzs/g' *.99999
sac_pzs_iv_esml_hhz__2013.074.10.18.23.0000_2599.365.23.59.59.99999
sac_pzs_iv_favr_hhe__2010.187.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_favr_hhn__2010.187.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_favr_hhz__2010.187.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_galf_hhe__2006.300.12.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_galf_hhn__2006.300.12.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_galf_hhz__2006.300.12.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_gib_hhe__2009.273.13.18.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_gib_hhn__2009.273.13.18.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_gib_hhz__2009.273.13.18.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_haga_hhe__2006.111.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_haga_hhn__2006.111.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_haga_hhz__2006.111.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_havl_hhe__2005.131.00.00.00.0000_2017.252.14.20.60.99999
sac_pzs_iv_havl_hhn__2005.131.00.00.00.0000_2017.252.14.20.60.99999
sac_pzs_iv_havl_hhz__2005.131.00.00.00.0000_2017.252.14.20.60.99999
sac_pzs_iv_hlni_hhe__2009.058.16.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_hlni_hhn__2009.058.16.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_hlni_hhz__2009.058.16.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_hmdc_hhe__2005.131.00.00.00.0000_2599.365.23.59.59.99999
sac_pzs_iv_hmdc_hhn__2005.131.00.00.00.0000_2599.365.23.59.59.99999
Problem Solved