2
votes
3answers
82 views

Linux: set date through command line

How to change the system date in Linux ? I want to change: Only Year Only Month Only Date Any combination of above three
1
vote
0answers
31 views

RTC is not saving time after hwclock

So I'm having quite a bit of trouble trying to get my system to set the hardware clock's time. Here is what I did just now, everything has worked, right? The first and last command seem to indicate ...
0
votes
3answers
71 views

how to disable time sync in VM guest?

I have a desktop (centos 6) that has a VM guest (RedHat 5.5). I just try to set the date to past time in VM guest. And it works. However, after 50 minutes, the time is sync to current time. After I ...
1
vote
0answers
44 views

How does an X86 Linux system maintain the system time, when no NTP etc. is in play?

When an x86 Linux system is powered up and running, how does it keep track of software time? E.g. is it incrementing a software counter based on hardware interrupts from the RTC, or is there some ...
8
votes
4answers
825 views

How can I measure and prevent clock drift?

On several production platforms we have observed symptoms which appear to suggest that the time of day clock is periodically jumping forward or backward. The jumps are typically around 1 second, ...
0
votes
1answer
235 views

Allowing a domain name in my IP Tables

I have a Linux server that gets a time offset for some strange reason. I set up cron job to run and update the time using the following command: /usr/sbin/ntpdate pool.ntp.org The problem is the ...
2
votes
0answers
272 views

How to freeze system clock for a wine application? [duplicate]

I have a windows program, that works only to a particular date. It's a legacy application and I can't change the source code. Is there any way to set a specific date in the system clock for the wine ...
5
votes
3answers
2k views

Host CPU does not scale frequency when KVM guest needs it

I have asked this question on serverfault, but it could also have been posted here. I will synchronise the answers if one is found. Observation: I have an HP server with an AMD dual core CPU (Turion ...
3
votes
1answer
673 views

Configure kbd and immediately profit of the changes without rebooting

I want to disable consoleblank and activates console clock vcstime which are obviously managed by kbd on my Debian 6. So I've changed the following in /etc/kbd/config file: POWERDOWN_TIME=1 ...
3
votes
4answers
812 views

Clock skews on remote machines

I am performing some experiments on a network of about 10 remote Linux computers which are geographically scattered. I suspect some of them have clock skews but they are seen transiently (eg. once in ...