Time >

See also:

• date (the Linux command)

• strftime

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2020-06-08 - devuan_beowulf_3.0.0_amd64 ∞

(Devuan)

https://wiki.debian.org/DateTime

NEWDATE=$( \date  +%T  --date '5 seconds ago' )
NEWDATE=$( \date  +%T  --date '1 hour' )

\sudo  \date  +%T  --set="$NEWDATE"

This won't work on something like VirtualBox since that date/time are managed through it.

https://rickguyer.com/virtualbox-disable-time-sync-between-host-and-client/

UNTESTED -- To change that, you can disable syncing between the host and guest. See VirtualBox: Disable Virtualbox date/time sync

On Linux, it would be

vboxmanage setextradata <vmname> "VBoxInternal/Devices/VMMDev/0/Config/GetHostTimeDisabled" "1"

To re-enable it, apparently you have to edit that VMs configuration XML file to remove the line. Setting it to "0" does not work.

2018-11-11 - devuan_ascii_2.0.0-rc_i386_dvd-1 ∞

(Devuan)

# Change the date and time:
\date  --set='yyyy-mm-dd hh:mm:ss'
# To only change the date:
# date  --set="yyyy-mm-dd $( \date +%H:%M:%S )"

# Store the above-set system time to the hardware clock.
\hwclock  --systohc

2009-07-19 - Unity Linux 0.99-alpha1 ∞

(Unity Linux)

I just use drakclock. Probably the same for Mandriva and PCLinuxOS too. No funny screen blanking etc is done for a simple day date change.

I think it reverted itself, so I'll try a clock --hctosys this time.

2008-03-12 - PCLinuxOS v2007 ∞

Same as 2001-12-21 - Slackware (version not recorded)

2005-08-02 - Debian (version not recorded) ∞

See also Time

date -s 2005-08-02                      # set the date: yyyy-mm-dd
                                        #   yyyymmdd also works.
date -s 14:05:0                         # set the time: hh:mm:ss (24 hour clock)

2001-12-21 - Slackware (version not recorded) ∞

date -s 20011221                        # set the date: yyyymmdd
clock --set --date 06:00:00 --localtime # set the time
clock --hctosys                         # save the system time to the hardware clock
                                        # This may blank your screen and/or trigger
                                        #    your screen saver, locking your screen.