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Weird linux time issue

Red Squirrel

Red Squirrel

No Lifer
Its that dreaded clock change time again, an admin's nightmare.

I never bothered with the windows patches since it involves some pretty completed registry edits and I was just never bothered to read the 20 page document on it, so what I do is just pick a different time zone. Like it was at GMT -4 so now I put it to GMT -5 for fallback. works great. (just changing the clock wont do it as the time server will report the time and it will switch back)

Now in Linux, I noticed that GMT-5 is actually the oposite of GMT+5, I had to put GMT+5 for it to work. Anyone ever seen this before? I'm kind of stumped.

Also does the time zone on a NTP server have any effect on the NTP services, or does NTP strictly use GMT?
 
GMT-5 is obviously the opposite of GMT+5 since addition and subtraction of the same number will get you a result in opposite directions.

I personally have never had to mess with my timezone because it all 'just works', I think you're over thinking it and should just set it to the right timezone and let it go.
 
Yeah but why would I set to GMT -5 in windows (which is our time zone) but in Linux I'd have to do +5? It used to "just work" until Bush went and screwed with it, but most computer software is still coded to change at the old times. I think they should abolish DST but thats a whole different story.
 
How is GMT+5 the opposite of GMT-5? One is 5 hours earlier (east) of Greenwich and the other is 5 hours later (west). They have nothing to do with each other. If you're in GMT+5, your country probably ends in "istan" so I highly doubt you want to be using it.

Any sane software uses standard libraries that any sane administrator patched a long time ago and hence there's nothing to worry about is there?
 
nope, linux has option to set hardware (BIOS) clock to UTC or to your local time - Windows uses local time & assumes what is in BIOS is local time, so linux screwed you up.
 
Yeah but why would I set to GMT -5 in windows (which is our time zone) but in Linux I'd have to do +5? It used to "just work" until Bush went and screwed with it, but most computer software is still coded to change at the old times. I think they should abolish DST but thats a whole different story.
Click to expand...

Because you're not paying attention? When you install most distros they ask you if the system clock is set to GMT or local time, if you choose GMT and boot up Windows it gets confused. As much as I dislike Bush he has nothing to do with your problems.
 
How would that be not paying attention? I had no idea what the difference is so I just chose default. So what would be the right option GMT or UTC, and how would I change it on an existing system without reinstalling?
 
GMT and UTC is the same thing, and neither is the correct setting for a dual boot machine.

As has been said above (are you paying attention yet? 😉), you need to set Linux to assume that the hardware clock is showing LOCAL time. You should find this in "Adjust Time and Date" control panel.
 
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