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how exactly to set timezone in /etc/localtime ?[solved]
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padoor
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PostPosted: Tue Jul 24, 2012 3:28 am    Post subject: how exactly to set timezone in /etc/localtime ?[solved] Reply with quote

Code:
tux ramaswamy # cat /etc/localtime
TZif21Local time zone must be set--see zic manual pageTZif21Local time zone must be set--see zic manual page
<Local time zone must be set--see zic manual page>0
 Asia/Kolkata
tux ramaswamy # man zic


although i get correct time in the hwclock i get the zic message always.
/etc/localtime is as above minus the message
man zic does not say how to set the localtime file.
is there anything to be in front of Asia/kolkata which is my timezone
help needed
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Last edited by padoor on Wed Jul 25, 2012 4:43 am; edited 1 time in total
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khayyam
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PostPosted: Tue Jul 24, 2012 5:02 am    Post subject: Reply with quote

padoor ...

You probably omitted to copy the timezone data file to /etc during the install ...

Code:
cp /usr/share/zoneinfo/Asia/Kolkata /etc/localtime

best ... khay
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padoor
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PostPosted: Wed Jul 25, 2012 4:42 am    Post subject: Reply with quote

copying timezone makes difference in the file than manually entering the time zone.
now the file reads as below.
Code:
TZif2^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^D^@^@^@^D^@^@^@^@^@^@^@^D^@^@^@^D^@^@$
��^���^Eq^X�^�2��t^R^�^A^B^C^B^@^@R�^@^@^@^@[h^@^D^@^@MX^@      ^@^@[h^A       $
^@^@[h^A
LMT^@HMT^@BURT^@IST^@^@^@^@^@^@^@^@^@^@^@
IST-5:30


and the message to set timezone has gone after cp timezone to localtime.
thanks for reply. :D
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Massimo B.
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PostPosted: Tue Nov 05, 2013 7:13 am    Post subject: Reply with quote

khayyam wrote:
Code:
cp /usr/share/zoneinfo/Asia/Kolkata /etc/localtime

btw. why does documentation recommend to copy? Is a symlink also fine? That would better show to me what timezone is actually set without looking into the binary file.
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666threesixes666
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PostPosted: Tue Nov 05, 2013 7:25 am    Post subject: Reply with quote

symlink makes more sense. pro tip, if you're dual booting xp, make xp load utc instead of setting bios to local clock. (see arch wiki) i run a symlink, works good. ive been going over this qutie a bit today.

Code:

mkultra [ ~ ]$ date
Tue Nov  5 02:24:40 EST 2013
mkultra [ ~ ]$ ls -al /etc/localtime
lrwxrwxrwx 1 root root 27 Nov  4 10:43 /etc/localtime -> /usr/share/zoneinfo/EST5EDT
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Fitzcarraldo
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PostPosted: Wed Nov 06, 2013 2:09 am    Post subject: Reply with quote

Apparently it is not always a good idea to make a symlink:

Quote:
Re: time issue

On Mon, 30 May 2011 10:57:51 +0200, Florian Philipp wrote:

> The localization guide seems to be in a poor state. Copying the zoneinfo
> file from /usr/share... to /etc/localtime is not the best way to do it
> because then you miss updates. It is better to create a symlink between
> the two.

Which will break if /usr is on a separate filesystem.

> Also, instead of setting the timezone in /etc/conf.d/clock, you
> do it in /etc/timezone nowadays (change introduced in baselayout-2 if
> I'm not mistaken).

Setting it in /etc/timezone also takes care of the updates situation,
because the timezone-data ebuild automatically copies the correct file
to /etc/.


--
Neil Bothwick

http://www.gossamer-threads.com/lists/gentoo/user/231423#231423
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Massimo B.
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PostPosted: Wed Nov 06, 2013 12:35 pm    Post subject: Reply with quote

Thank you for that information.
Does that mean, setting /etc/timezone makes the ebuild maintain the binary /etc/localtime ? So having /etc/localtime -> /usr/share/zoneinfo/Europe/Berlin will be overwritten by the ebuild anyway?
Ok, breaking with /usr on separate filesystem is a point. I don't have that. So with local /usr having that symlink should be fine with updated /usr/share/zoneinfo/Europe/Berlin as well.
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Fitzcarraldo
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PostPosted: Wed Nov 06, 2013 2:06 pm    Post subject: Reply with quote

As Neil Bothwick wrote, the sys-libs/timezone-data ebuild takes care of updating /etc/localtime whenever necessary, so symlinking is just not necessary, and copying once only is fine. Have a look at the relevant part of the ebuild and you can see this:

Code:
80    pkg_config() {
81    # make sure the /etc/localtime file does not get stale #127899
82    local tz src etc_lt="${EROOT}etc/localtime"
83    
84    if has_version '<sys-apps/baselayout-2' ; then
85    src="${EROOT}etc/conf.d/clock"
86    tz=$(unset TIMEZONE ; source "${src}" ; echo ${TIMEZONE-FOOKABLOIE})
87    else
88    src="${EROOT}etc/timezone"
89    if [[ -e ${src} ]] ; then
90    tz=$(sed -e 's:#.*::' -e 's:[[:space:]]*::g' -e '/^$/d' "${src}")
91    else
92    tz="FOOKABLOIE"
93    fi
94    fi
95    [[ -z ${tz} ]] && return 0
96    
97    if [[ ${tz} == "FOOKABLOIE" ]] ; then
98    elog "You do not have TIMEZONE set in ${src}."
99    
100    if [[ ! -e ${etc_lt} ]] ; then
101    # if /etc/localtime is a symlink somewhere, assume they
102    # know what they're doing and they're managing it themselves
103    if [[ ! -L ${etc_lt} ]] ; then
104    cp -f "${EROOT}"/usr/share/zoneinfo/Factory "${etc_lt}"
105    elog "Setting ${etc_lt} to Factory."
106    else
107    elog "Assuming your ${etc_lt} symlink is what you want; skipping update."
108    fi
109    else
110    elog "Skipping auto-update of ${etc_lt}."
111    fi
112    return 0
113    fi
114    
115    if [[ ! -e ${EROOT}/usr/share/zoneinfo/${tz} ]] ; then
116    elog "You have an invalid TIMEZONE setting in ${src}"
117    elog "Your ${etc_lt} has been reset to Factory; enjoy!"
118    tz="Factory"
119    fi
120    einfo "Updating ${etc_lt} with ${EROOT}usr/share/zoneinfo/${tz}"
121    [[ -L ${etc_lt} ]] && rm -f "${etc_lt}"
122    cp -f "${EROOT}"/usr/share/zoneinfo/"${tz}" "${etc_lt}"
123    }

However, the ebuild is clever enough to skip the automatic update of /etc/localtime if you had already symlinked it.

So, the bottom line is: symlinking brings no additional benefit and won't work anyway for people who have /usr on a separate filesystem. However, for those people who have /usr on the same partition/filesystem, symlinking won't do any harm but is no better than the once-only copying procedure.
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