How do I get the current Unix time in milliseconds in Bash?

This:

date +%s

will return the number of seconds since the epoch.

This:

date +%s%N

returns the seconds and current nanoseconds.

So:

date +%s%N | cut -b1-13

will give you the number of milliseconds since the epoch – current seconds plus the left three of the nanoseconds.

and from MikeyB – echo $(($(date +%s%N)/1000000)) (dividing by 1000 only brings to microseconds)

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