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Accepted
Josip Medved
Asked: 2009-08-21 14:53:24 +0800 CST

How to discover current time-zone (FreeNAS shell)?

  • 772

How can I find which time-zone is currently in effect on my system and get offset to it?

I need this information in order to offset some time calculations and I cannot make it constant because of daylight saving time (which effectively changes offset).

E.g. Currently my time-zone offset is +02:00 and it will be +01:00 during winter. I need to get which one it is and offset in hours (e.g. in this case answer should be 2).

I would need to do this in either tcsh or bash.

From command line it looks like time-zone isn't set (date "+%z" returns 0). However, from web interface time-zone is set to Europe/Zagreb. I would like to get offset to that time-zone.

Version of FreeNAS is 0.7 RC1.

shell

3 Answers

  1. Best Answer
    $ date "+%Z"

    Will give you the current timezone

    $ date "+%z"

    Will give the offset from DST

    • 7 
  2. get_current_timzone() {

CURRENT_TIMEZONE="$(md5 /etc/localtime | awk '{print $4}')"

find /usr/share/zoneinfo | while read LINE; do
    FOUND_TIMEZONE="$(md5 ${LINE} | awk '{print $4}')"
    if [ "${CURRENT_TIMEZONE}" == "${FOUND_TIMEZONE}" ]; then
        echo ${LINE} | sed -E 's|/usr/share/zoneinfo/||'
    fi
done

}


root@Host-10 [~]$ get_current_timzone
    • 1

  3. FreeNAS runs on FreeBSD, so using http://www.cyberciti.biz/faq/howto-set-date-and-time-timezone-in-freebsd/ as a guide:

    FreeBSD Setup Timezone

    To setup corrct timezone you need to copy your timezone file from /usr/share/zoneinfo directory to /etc/localtime file. Just goto directory:

    # cd /usr/share/zoneinfo

    Use ls -l command to find out your zonefile.

    # ls -l

    For example I am in Asia/Culcatta (IST time zone) so I need to copy file as follows:

    # cp /usr/share/zoneinfo/Asia/Calcutta /etc/localtime
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