For starters, go to the FAQ here and look into the datecalc script that Perderabo wrote called 'Date Arithmetic'.
The primary data element used throught UNIX for time keeping and file times is the epoch second, the number of seconds since Jan 1 1970. Convert a desired start date/time to epoch seconds, convert a desired stop date/time to epoch seconds. Then for each record you can pick what you want.
In your case there is a shortcut, but if choose to extend the time by much you will find it will not work - why the talk about epoch seconds above.
You may not be using dmesg, use your method instead. just keep the awk segment.
Last edited by jim mcnamara; 12-10-2010 at 05:44 PM..
Reason: oops - $1 changed to $3
I have the following file and need to extract date and time part for each record. Pl. could anyone provide an shell script which could be used to do it. Here is the file:
/rgrdev/pdsud2/unx/agc/src/agcmst:
/rgrsrc/pdspms/unx/agc/src/s.agcmst.for
agcmst.for 420.20 8/4/07 18:30:53
... (7 Replies)
Hi,
I am a beginner in shell scripting but I have a task to complete where I have to extract the time of script execution in human format so anyone can run the script and understand what script is running when in simple format. Let me illustrate what I mean:
Two scripts in crontab, for this... (4 Replies)
Hi,
anyone has any ideas on how do we extract lines from a file with format similiar to this: (based on current time)
Jun 18 00:16:50 .......... ............. ............
Jun 18 00:17:59 .......... ............. ............
Jun 18 01:17:20 .......... ............. ............
Jun 18... (5 Replies)
Hi,
I am having a file name as exp_bkp_tables_18_Oct_2010_10_50_28.dmp which is used for import the records.
Now, I want to print the output using the selected file name as below :
Table records will get restored as on date 18-Oct-2010 and time 10:50:28
How it can be done ?
With... (5 Replies)
Hi Guys !
is it possible to extract lines from a file which satisfy a time contraint
for example program should consider two boundaries one current time and second the user define time and then extract all those line which fall into that specified time
lets say 10 (user define time) and 12... (5 Replies)
Hi Everyone !
i want to take all the lines from a file that falls in between some date... and every line in a file has a time stamp..
---some text---- 01/Jan/2010 ---- some other text ----
---some text---- 10/Jan/2010 ---- some other text ----
---some text---- 20/Dec/2010 ---- some... (3 Replies)
Hi ,
I am trying to extract contents of a file between specified time stamp. but it does not seem to work. i am trying to extract output of /var/adm/messages between 15:00:00 to 15:23:59 .
i have tried two regex the first one seems to kind of work. it displays some output. the second one is... (13 Replies)
Hi All,
i have some log files generated in a folder daily with the format
abc.def.20130306.100001
ghi.jkl.20130306.100203
abc.def.20130305.100001
ghi.jkl.20130305.100203
the format is the date followed by time . all i want is to get the files that are generated for todays... (3 Replies)
Through find command I identified the files older that 1 year. I need the overall size utilizes by these 1 year older files. Please share me the command to identify it .Thanks
Please post in an adequate technical forum! (3 Replies)
Discussion started by: Sang
3 Replies
LEARN ABOUT DEBIAN
function::ctime
function::ctime
FUNCTION:(3stap) Time utility functions FUNCTION:(3stap)NAME
function::ctime - Convert seconds since epoch into human readable date/time string
SYNOPSIS
ctime:string(epochsecs:long)
ARGUMENTS
epochsecs
Number of seconds since epoch (as returned by gettimeofday_s)
DESCRIPTION
Takes an argument of seconds since the epoch as returned by gettimeofday_s. Returns a string of the form
"Wed Jun 30 21:49:08 1993"
The string will always be exactly 24 characters. If the time would be unreasonable far in the past (before what can be represented with a
32 bit offset in seconds from the epoch) the returned string will be "a long, long time ago...". If the time would be unreasonable far in
the future the returned string will be "far far in the future..." (both these strings are also 24 characters wide).
Note that the epoch (zero) corresponds to
"Thu Jan 1 00:00:00 1970"
The earliest full date given by ctime, corresponding to epochsecs -2147483648 is "Fri Dec 13 20:45:52 1901". The latest full date given by
ctime, corresponding to epochsecs 2147483647 is "Tue Jan 19 03:14:07 2038".
The abbreviations for the days of the week are 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', and 'Sat'. The abbreviations for the months are
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', and 'Dec'.
Note that the real C library ctime function puts a newline ('
') character at the end of the string that this function does not. Also note
that since the kernel has no concept of timezones, the returned time is always in GMT.
SystemTap Tapset Reference May 2013 FUNCTION:(3stap)