{"id":37,"date":"2007-03-01T08:55:24","date_gmt":"2007-03-01T16:55:24","guid":{"rendered":"http:\/\/jim-zimmerman.com\/blog\/?p=37"},"modified":"2007-05-20T05:56:20","modified_gmt":"2007-05-20T13:56:20","slug":"possible-dst-solution-for-older-redhat-systems","status":"publish","type":"post","link":"https:\/\/jim-zimmerman.com\/?p=37","title":{"rendered":"To update timezone to support DST on RedHat systems."},"content":{"rendered":"

To verify the current 2007 timezone settings.<\/p>\n

#zdump -v \/etc\/localtime | grep 2007<\/p>\n

————————————————————————————————————–<\/p>\n

\/etc\/localtime.orig Sun Apr 1 09:59:59 2007 UTC = Sun Apr 1 01:59:59 2007 PST isdst=0 gmtoff=-28800
\n\/etc\/localtime.orig Sun Apr 1 10:00:00 2007 UTC = Sun Apr 1 03:00:00 2007 PDT isdst=1 gmtoff=-25200
\n\/etc\/localtime.orig Sun Oct 28 08:59:59 2007 UTC = Sun Oct 28 01:59:59 2007 PDT isdst=1 gmtoff=-25200
\n\/etc\/localtime.orig Sun Oct 28 09:00:00 2007 UTC = Sun Oct 28 01:00:00 2007 PST isdst=0 gmtoff=-28800
\n————————————————————————————————————–<\/p>\n

cd \/usr\/local\/src<\/p>\n

mkdir tzdata2007c<\/p>\n

Downloaded the following ftp:\/\/elsie.nci.nih.gov\/pub\/tzdata2007c.tar.gz<\/a>.<\/p>\n

Here is the version I used:
\nUpdated time zone source files.<\/a><\/p>\n

wget ftp:\/\/elsie.nci.nih.gov\/pub\/tzdata2007c.tar.gz<\/p>\n

tar -zxvf tzdata2007c.tar.gz
\nzic -d \/tmp\/zoneinfo northamerica
\ncd \/tmp\/zoneinfo\/<\/p>\n

Verify the compiled timezone files are correct:<\/p>\n

zdump -v \/tmp\/zoneinfo\/PST8PDT | grep 2007<\/p>\n

————————————————————————————————————–<\/p>\n

\/tmp\/zoneinfo\/PST8PDT Sun Mar 11 09:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 PST isdst=0 gmtoff=-28800
\n\/tmp\/zoneinfo\/PST8PDT Sun Mar 11 10:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 PDT isdst=1 gmtoff=-25200
\n\/tmp\/zoneinfo\/PST8PDT Sun Nov 4 08:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 PDT isdst=1 gmtoff=-25200
\n\/tmp\/zoneinfo\/PST8PDT Sun Nov 4 09:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 PST isdst=0 gmtoff=-28800
\n————————————————————————————————————–
\ncd \/usr\/share\/zoneinfo\/
\ncp -p PST8PDT PST8PDT.orig
\ncp \/tmp\/zoneinfo\/PST8PDT .
\ncd America\/
\ncp -p Los_Angeles Los_Angeles.orig
\ncp \/tmp\/zoneinfo\/PST8PDT Los_Angeles<\/p>\n

Verify the copied files are correct:<\/p>\n

zdump -v \/usr\/share\/zoneinfo\/PST8PDT | grep 2007<\/p>\n

————————————————————————————————————–<\/p>\n

\/usr\/share\/zoneinfo\/PST8PDT Sun Mar 11 09:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 PST isdst=0 gmtoff=-28800
\n\/usr\/share\/zoneinfo\/PST8PDT Sun Mar 11 10:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 PDT isdst=1 gmtoff=-25200
\n\/usr\/share\/zoneinfo\/PST8PDT Sun Nov 4 08:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 PDT isdst=1 gmtoff=-25200
\n\/usr\/share\/zoneinfo\/PST8PDT Sun Nov 4 09:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 PST isdst=0 gmtoff=-28800<\/p>\n

————————————————————————————————————–<\/p>\n

zdump -v \/usr\/share\/zoneinfo\/America\/Los_Angeles | grep 2007<\/p>\n

————————————————————————————————————–<\/p>\n

\/usr\/share\/zoneinfo\/America\/Los_Angeles Sun Mar 11 09:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 PST isdst=0 gmtoff=-28800
\n\/usr\/share\/zoneinfo\/America\/Los_Angeles Sun Mar 11 10:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 PDT isdst=1 gmtoff=-25200
\n\/usr\/share\/zoneinfo\/America\/Los_Angeles Sun Nov 4 08:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 PDT isdst=1 gmtoff=-25200
\n\/usr\/share\/zoneinfo\/America\/Los_Angeles Sun Nov 4 09:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 PST isdst=0 gmtoff=-28800<\/p>\n

————————————————————————————————————–<\/p>\n

cp -p localtime localtime.orig
\nln -fs \/usr\/share\/zoneinfo\/PST8PDT localtime<\/p>\n

Verify the currently set timezone is correct:
\nzdump -v \/etc\/localtime | grep 2007<\/p>\n

————————————————————————————————————–<\/p>\n

\/etc\/localtime Sun Mar 11 09:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 PST isdst=0 gmtoff=-28800
\n\/etc\/localtime Sun Mar 11 10:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 PDT isdst=1 gmtoff=-25200
\n\/etc\/localtime Sun Nov 4 08:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 PDT isdst=1 gmtoff=-25200
\n\/etc\/localtime Sun Nov 4 09:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 PST isdst=0 gmtoff=-28800
\n————————————————————————————————————–<\/p>\n","protected":false},"excerpt":{"rendered":"

To verify the current 2007 timezone settings. #zdump -v \/etc\/localtime | grep 2007 ————————————————————————————————————– \/etc\/localtime.orig Sun Apr 1 09:59:59 2007 UTC = Sun Apr 1 01:59:59 2007 PST isdst=0 gmtoff=-28800 \/etc\/localtime.orig Sun Apr 1 10:00:00 2007 UTC = Sun Apr 1 03:00:00 2007 PDT isdst=1 gmtoff=-25200 \/etc\/localtime.orig Sun Oct 28 08:59:59 2007 UTC = Sun [&hellip<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-37","post","type-post","status-publish","format-standard","hentry","category-documentation"],"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=37"}],"version-history":[{"count":0,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/37\/revisions"}],"wp:attachment":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=37"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=37"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}