Is there such command for changing the System clock's date and time?
For example:
The current date and time is January 1, 1970 22:30:59:980 where 59 and 980 refers to the seconds and millisecods respectively
And I want to change it to January 2, 1971 23:31:59:990
Is there a command for this?
To set the time in Ubuntu from the terminal, you can use the following command:
sudo date new_date_time_string
where new_date_time_string has to follow the format MMDDhhmmyyyy.ss which is described below:
MM is a two digit month, between 01 to 12DD is a two digit day, between 01 and 31, with the regular rules for days according to month and year applyinghh is two digit hour, using the 24-hour period so it is between 00 and 23mm is two digit minute, between 00 and 59yyyy is the year; it can be two digit or four digitss is two digit seconds. Notice the period . before the ss.Source: Manage Time in Ubuntu Through Command Line.
So, in your particular case, you can use:
sudo date 010224311971.59
Or, you can use:
sudo date --set="1971-01-02 23:31:59.990" && date --rfc-3339=ns
which is exactly what you asked.
Source:
