Obtaining a Unix Timestamp in Go Language (current time in seconds since epoch)

import "time"
...
port[5] = time.Now().Unix()

If you want it as string just convert it via strconv:

package main

import (
    "fmt"
    "strconv"
    "time"
)

func main() {
    timestamp := strconv.FormatInt(time.Now().UTC().UnixNano(), 10)
    fmt.Println(timestamp) // prints: 1436773875771421417
}

Another tip. time.Now().UnixNano()(godoc) will give you nanoseconds since the epoch. It's not strictly Unix time, but it gives you sub second precision using the same epoch, which can be handy.

Edit: Changed to match current golang api

Building on the idea from another answer here, to get a human-readable interpretation, you can use:

package main

import (
    "fmt"
    "time"
)

func main() {
    timestamp := time.Unix(time.Now().Unix(), 0)
    fmt.Printf("%v", timestamp) // prints: 2009-11-10 23:00:00 +0000 UTC
}

Try it in The Go Playground.