i have the following log,
Oct 9 20:52:37 130.130.128.122 Oct 9 04:47:22 130.130.128.122 CisACS_03_RADIUSAcc p5powg8x 1 0 User-Name=GSSHTB\17997,NAS-IP-Address=10.10.1.24,NAS-Port=50010,Group-Name=Group 80,Calling-Station-Id=00-11-43-BC-76-19,Acct-Status-Type=Stop,Acct-Input-Octets=5726228,Acct-Output-Octets=92503773,Acct-Session-Id=10.10.1.24 GSSHTB\17997 03/14/93 04:43:21 000000E9,Acct-Session-Time=16839,
from the above log i can find the stop time( 03/14/93 04:43:21), and time (Acct-Session-Time=16839), now I want to caculate the beginning time , how can i get this result?
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