How do I compare two timestamps in Unix?

How do I compare two timestamps in Unix?

D1

1. Create a format string that prints a date in the same format as supplied: $ date -u +’\%d\%b\%y:\%T’ 07Jul17:15:18:48.
2. Use that string to tell busybox date how to parse the date string.
3. Make busybox date to print the value in seconds (since epoch): $ busybox date -u -D ‘\%d\%b\%y:\%T’ -d “$d1” +’\%s’ 1490314449.

How do I use dates in awk?

There are no built-in functions in standard awk to get a date, but the date can easily be assigned to a variable. gawk , does have built-in time functions , and strftime can be used.

Can we compare two timestamps?

The compareTo() method of Timestamp class returns : Integer value 0 if this Timestamp object is equal to given Timestamp object. A value less than 0 if this Timespan object is before the given argument. A value greater than 0 if this Timespan object is after the given argument.

How do I get the time difference between two dates in Unix?

1. Provide valid time string in A and B.
2. Use date -d to handle time strings.
3. Use date \%s to convert time strings to seconds since 1970 (unix epoche)
4. Use bash parameter expansion to subtract seconds.
5. divide by seconds per day (86400=60*60*24) to get difference as days.
6. ! DST is not taken into account ! See this answer at unix.

How do I change the date format in awk?

5 Answers. awk -F, ‘{print | “date -d “$4″ \”+\%Y-\%m-\%d\”,”$1″,”$8}’ in_t. txt. Got this solution working.

How do you specify a separator in awk?

Just put your desired field separator with the -F option in the AWK command and the column number you want to print segregated as per your mentioned field separator. AWK works as a text interpreter that goes linewise for the whole document and that goes fieldwise for each line.

How do you compare a timestamp in a data frame?

Approach:

1. Create a dataframe with date and time values.
2. Convert date and time values to timestamp values using pandas. timestamp() method.
3. Compare required timestamps using regular comparison operators.

How to compare two files with different dates and timestamps?

You’d have to parse the Date and time stamp from a Dir for each file, convert it to a number format that batch can handle, and then compare the timestamps. Doable, but much more involved using a batch file. The GNU utilities would be much easier if you need to compare Created/Accessed dates in different folders without moving either file.

How to test AWK script?

For the Awk script, test.awk should be myscript.awk. Using Dir, the files have to be in the same folder and you can’t mix hidden and non-hidden files.

How to test for time difference between two files?

The usual way to test file times is the shell: Seems to work with seconds. This, which will touch the files with a time difference less than a second, doesn’t detect that difference: The file1 is (a bit) newer than file2. The problem now will be to correctly process the time value.