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On my Red Hat 5.3 Linux machine, NTP isn’t installed (can't install it for some reasons). However I can copy the binary /usr/sbin/ntpdate from another Linux machine to mine.

If I only get the file ntpdate and put it on my Linux machine under /tmp, is it possible to run

/tmp/ntpdate -u

in order to update my date? would be my Linux machine.

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First it depends if the machine architecture and library versions are compatible with your ntpdate version. Then you have to check if /tmp is not mounted with noexec flag (however there is workaround for that) and finally you have to be a root to use ntpdate. But just try it. It is very hard to tell is it working or not based on this information.

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