How To Get The Current Epoch Time (Unix Timestamp)

Perl	time
PHP	time()
Ruby	Time.now (or Time.new). To display the epoch: Time.now.to_i
Python	import time first, then int(time.time())
Java	long epoch = System.currentTimeMillis()/1000;
Microsoft .NET C#	epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
VBScript/ASP	DateDiff("s", "01/01/1970 00:00:00", Now())
Erlang	calendar:datetime_to_gregorian_seconds(calendar:now_to_universal_time( now()))-719528*24*3600. OR element(1, now()) * 10000 + element(2, now()).
MySQL	SELECT unix_timestamp(now())
PostgreSQL	SELECT extract(epoch FROM now());
Oracle PL/SQL	SELECT (SYSDATE - TO_DATE('01-01-1970 00:00:00', 'DD-MM-YYYY HH24:MI:SS')) * 24 * 60 * 60 FROM DUAL
SQL Server	SELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
JavaScript	Math.round(new Date().getTime()/1000.0)getTime() returns time in milliseconds.
Unix/Linux Shell	date +%s
PowerShell	Get-Date -UFormat "%s" Produces: 1279152364.63599
Actionscript	(new Date()).time
Other OS’s	Command line: perl -e "print time" (If Perl is installed on your system)
ColdFusion (CFML) MX 6.1+	#int( getTickCount() / 1000 )#
Bash	Command Line: date +%s

from : https://shafiqissani.wordpress.com/2010/09/30/how-to-get-the-current-epoch-time-unix-timestamp/