gmt 0400

About GMT and UTCFirst, IntroductionMany people know that the two-way schedule is referred to as GMT or UTC, and the World Time Zone table is referred to as universal, so what is the actual intent of GMT and UTC? How is the world time zone

MONGO practice-operation via JS Shell MONGOSave command:J={name: "Wangjingjing", age:15}Db.user.save (j);Query command:var cursor = Db.user.find ();while (Cursor.hasnext ()) Printjson (Cursor.next ());Printjson (Cursor[4]);var arr = Cursor.toarray ()

UTC time & local time (1) The whole earth is divided into twenty-four time zones, each of which has its own local time. For international radio communication, a unified time is used for the sake of unification, called Universal coordination Time

1. Check the status of the replica setUse Db.runcommand ({"Replsetgetstatus": 1}), or rs.status ();2. Check replication delay Timesource:m1.example.net:30001 syncedto:tue Oct 11:33:40 GMT-0400 (EDT) = 7475 secs ago (2.08hrs) source : m2.example.net:3

The whole earth is divided into twenty-four time zones, each of which has its own local time. For international radio communication, a unified time is used for the sake of unification, called Universal coordination Time (UTC, Universal Time

Each region has its own local time, and the time conversion problem on the Internet and radio communication is particularly prominent. Record here for memo. The whole earth is divided into twenty-four time zones, each of which has its own local

"Database Commands""How the Command Works"The commands in MongoDB are actually implemented as a special type of query that is executed against the $cmd collection. RunCommand simply accepts the command document and executes the equivalent query, so>

The default installed time zone for VPS I purchased is Moscow (East quad)? And look at the execution of several commands: root@blogguy_cn:~# DateWed 8 20:16:23 MSK 2014root@blogguy_cn:~# Date-uWed 8 16:16:26 UTC 2014root@blogguy_cn:~# Date-rWed 2014

The function:function itself is an object that can be assigned to any variableImmediate invoked function expression (Iife): function () {} ()Method vs Function: A method is a function attribute of an object (the A method is a function, which is a

Get the date of the dayDate +%y-%m-%dOutput: 2011-07-28Assigns the current date to a date variabledate=$ (Date +%y%m%d)Sometimes we need to use dates before or after today, so we can use the-D parameter of dateGet Tomorrow's dateDate-d Next-day