How to change date : from BST to GMT ?

[OLIVA_1]

Hello,

When I type the command "date" the result is :

#date
Tue Apr 15 17:41:45 BST 2003

I wish change BST to GMT, can someone help me ?

Thanks,

[Pete Randall]

/sbin/set_parms timezone
should do it for you.


Pete

[Zafar A. Mohammed_1]

export TZ=GMT5

[Zafar A. Mohammed_1]

$date -u

[OLIVA_1]

Thanks,

Do you know if this modification is permanent... for instance after a reboot ?

Another question, which files are concerned by this modification ?


Thanks,

[Jeff Schussele]

Hi,

You only need to change your TZ variable.

export TZ=GMT0

then try your date again.
I'm curious - are you in an area that does not use British Summer Time?

I suspect that your default system time (set by set_parms timezone) is GMT0BST & you've now shifted to the British Summer Time & that's why the date is now showing BST.

HTH,
Jeff

[Zafar A. Mohammed_1]

Setting the Time Zone (TZ)
/sbin/set_parms sets your time zone upon booting. If you have to reset
the time zone, you can use /sbin/set_parms.

You can also check
http://docs.hp.com/hpux/pdf/B2355-90742.pdf

Chapter#3 Section Making Adjustment

Thanks
Zafar

[Jeff Schussele]

Hi,

Check /etc/default/tz

That's where the default TZ is held.

HTH,
Jeff

[James R. Ferguson]

Hi:

The actual time of a server should not change nor does not need to change for timezone representation.

The envrionmental variable TZ holds the timezone as defined in '/usr/lib/tztab'.

A global declaration for TZ is placed in '/etc/TIMEZONE'. This is sourced when a login occurs and '/etc/profile' is read. Indivicual users can (and are free to) set their own TZ value in their own profiles, scripts or for the duration of a command only, as, for instance:

# TZ=MST7MDT date;date

...which would return the current date and time in US Mountain time and in the server's local time.

Regards!

...JRF...

[John Dvorchak]

the file /etc/TIMEZONE is sourced by /etc/profile and the env var TZ is set there.

[Olivier ROBERT · Accepted solution]

Pete's method changes the default time display and is permanent (survives across reboots).
Zafar's "export" method changes the date display in your current session only, it doesn't survive a logout, not to say a reboot.
Zafar's "date" method displays UTC once only.

The affected files are only one: /etc/TIMEZONE

Hope this helps,

Olivier

[OLIVA_1]

PERFECT, thanks to all !