I have two text files. One file has startdatetime and second file have enddatetime.

file 1 data(startdate-time):

2019-01-08 04:14:59
2019-01-08 04:16:57

file 2 data(enddate-time):

2019-01-08 04:15:50
2019-01-08 04:17:02

I need Unix script which will perform operation on endtime - starttime (only on time). Example for first entry it should perform:

04:15:50 - 04:14:59

and give result in seconds (for this example, it should print out the number 51).

I have two text files. One file has startdatetime and second file have enddatetime.

file 1 data(startdate-time):

2019-01-08 04:14:59
2019-01-08 04:16:57

file 2 data(enddate-time):

2019-01-08 04:15:50
2019-01-08 04:17:02

I need Unix script which will perform operation on endtime - starttime (only on time). Example for first entry it should perform:

04:15:50 - 04:14:59

and give result in seconds (for this example, it should print total difference seconds)

I have two text files.  One file has startdatetime and the second file has enddatetime.

file 1 data  (startdate-time):

2019-01-08 04:14:59
2019-01-08 04:16:57

file 2 data  (enddate-time):

2019-01-08 04:15:50
2019-01-08 04:17:02

I need a Unix script which will perform operation on endtime − starttime (only on time). For example, for the first entry it should perform:

04:15:50 - 04:14:59

and give result in seconds (for this example, it should print out the number 51).

I have two text files. One file has startdatetime and second file have enddatetime.

file 1 data(startdate-time):

2019-01-08 04:14:59
2019-01-08 04:16:57

file 2 data(enddate-time):

2019-01-08 04:15:50
2019-01-08 04:17:02

I need Unix script which will perform operation on endtime - starttime (only on time). Example for first entry it should perform:

04:15:50 - 04:14:59

and give result in seconds (for this example, it should print out the number 51).

I have two text files. One file has startdatetime and second file have enddatetime.

file 1 data(startdate-time):

2019-01-08 04:14:59
2019-01-08 04:16:57

file 2 data(enddate-time):

2019-01-08 04:15:50
2019-01-08 04:17:02

I need Unix script which will perform operation on endtime - starttime (only on time). Example for first entry it should perform:

04:15:50 - 04:14:59

and give result in seconds (for this example, it should print out the number 51).

I have two text files.  One file has startdatetime and the second file has enddatetime.

file 1 data  (startdate-time):

2019-01-08 04:14:59
2019-01-08 04:16:57

file 2 data  (enddate-time):

2019-01-08 04:15:50
2019-01-08 04:17:02

I need a Unix script which will perform operation on endtime − starttime (only on time). For example, for the first entry it should perform:

04:15:50 - 04:14:59

and give result in seconds (for this example, it should print out the number 51).