{"id":265,"date":"2025-11-18T20:20:46","date_gmt":"2025-11-18T20:20:46","guid":{"rendered":"https:\/\/adveyer.com\/blog\/?p=265"},"modified":"2025-11-18T20:20:46","modified_gmt":"2025-11-18T20:20:46","slug":"linux-tarih-ve-saat-ayari-degistirme","status":"publish","type":"post","link":"https:\/\/adveyer.com\/blog\/linux-tarih-ve-saat-ayari-degistirme\/","title":{"rendered":"Linux Tarih ve Saat Ayar\u0131 De\u011fi\u015ftirme"},"content":{"rendered":"<p>Linux sunucular ve makineler \u00fczerinde do\u011fru tarih ve saat ayar\u0131n\u0131n yap\u0131lmas\u0131 olduk\u00e7a \u00f6nemlidir.<br \/>\n\u00d6zellikle sunucu loglar\u0131, cron g\u00f6revleri, g\u00fcvenlik politikalar\u0131, SSL sertifikalar\u0131, e-posta g\u00f6nderimleri gibi kritik i\u015flemler i\u00e7in sistem saatinin do\u011fru olmas\u0131 \u015fartt\u0131r.<br \/>\nYanl\u0131\u015f tarih\/saat ayarlar\u0131; log karma\u015fas\u0131na, cron job hatalar\u0131na, e-posta reddine (SPF\/DKIM uyu\u015fmazl\u0131\u011f\u0131) ve hatta uygulama \u00e7\u00f6kmelerine neden olabilir.<\/p>\n<p>Bu rehberde Linux \u00fczerinde tarih ve saat de\u011fi\u015ftirme, timezone ayar\u0131 yapma ve NTP senkronizasyonu gibi t\u00fcm s\u00fcre\u00e7leri ad\u0131m ad\u0131m \u00f6\u011freneceksiniz.<\/p>\n<h1><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-266 \" src=\"https:\/\/adveyer.com\/blog\/wp-content\/uploads\/2025\/11\/linux-tarih-ve-saat-ayari-degistirme.webp\" alt=\"Linux tarih ve saat ayar\u0131 de\u011fi\u015ftirme\" width=\"924\" height=\"539\" srcset=\"https:\/\/adveyer.com\/blog\/wp-content\/uploads\/2025\/11\/linux-tarih-ve-saat-ayari-degistirme.webp 1200w, https:\/\/adveyer.com\/blog\/wp-content\/uploads\/2025\/11\/linux-tarih-ve-saat-ayari-degistirme-300x175.webp 300w, https:\/\/adveyer.com\/blog\/wp-content\/uploads\/2025\/11\/linux-tarih-ve-saat-ayari-degistirme-1024x597.webp 1024w, https:\/\/adveyer.com\/blog\/wp-content\/uploads\/2025\/11\/linux-tarih-ve-saat-ayari-degistirme-768x448.webp 768w\" sizes=\"auto, (max-width: 924px) 100vw, 924px\" \/><\/h1>\n<h1><strong>Mevcut Tarih ve Saat Ayarlar\u0131n\u0131 Kontrol Etme<\/strong><\/h1>\n<p>Linux sistemlerde ge\u00e7erli zaman\u0131 g\u00f6r\u00fcnt\u00fclemek i\u00e7in:<\/p>\n<pre><code class=\"language-bash\">date\r\n<\/code><\/pre>\n<p>\u00d6rnek \u00e7\u0131kt\u0131:<\/p>\n<pre><code>Thu Feb 13 18:24:13 +03 2025\r\n<\/code><\/pre>\n<p>Ayr\u0131ca timezone bilgisini g\u00f6r\u00fcnt\u00fclemek i\u00e7in:<\/p>\n<pre><code class=\"language-bash\">timedatectl\r\n<\/code><\/pre>\n<p>\u00c7\u0131kt\u0131:<\/p>\n<pre><code>Local time: Fri 2025-02-14 14:22:31 +03\r\nTime zone: Europe\/Istanbul (TRT, +03)\r\nNTP enabled: yes\r\n<\/code><\/pre>\n<p>Bu bilgiler sisteminizin g\u00fcncel saat, timezone ve NTP durumunu g\u00f6sterir.<\/p>\n<h1><strong>Tarih ve Saat Ayar\u0131n\u0131 Manuel De\u011fi\u015ftirme<\/strong><\/h1>\n<p>Saniyesine kadar manuel zaman de\u011fi\u015ftirmek m\u00fcmk\u00fcnd\u00fcr.<\/p>\n<h3>Genel kullan\u0131m:<\/h3>\n<pre><code class=\"language-bash\">sudo date --set=\"YYYY-MM-DD HH:MM:SS\"\r\n<\/code><\/pre>\n<p>\u00d6rnek:<\/p>\n<pre><code class=\"language-bash\">sudo date --set=\"2025-02-14 14:30:00\"\r\n<\/code><\/pre>\n<p>Yaln\u0131z bu de\u011fi\u015fiklik <strong>kal\u0131c\u0131 de\u011fildir<\/strong> e\u011fer NTP \u00e7al\u0131\u015f\u0131yorsa yeniden eski haline d\u00f6ner.<br \/>\nBu nedenle NTP kapal\u0131ysa yap\u0131lmal\u0131d\u0131r.<\/p>\n<h1><strong>Timezone (Saat Dilimi) De\u011fi\u015ftirme<\/strong><\/h1>\n<p>Linux\u2019ta yanl\u0131\u015f timezone ayar\u0131, zaman\u0131n hatal\u0131 g\u00f6r\u00fcnmesinin en yayg\u0131n sebebidir.<\/p>\n<p>T\u00fcm timezone listesini g\u00f6r\u00fcnt\u00fclemek i\u00e7in:<\/p>\n<pre><code class=\"language-bash\">timedatectl list-timezones\r\n<\/code><\/pre>\n<p>T\u00fcrkiye i\u00e7in gerekli timezone:<\/p>\n<pre><code>Europe\/Istanbul\r\n<\/code><\/pre>\n<p>Timezone ayarlamak i\u00e7in:<\/p>\n<pre><code class=\"language-bash\">sudo timedatectl set-timezone Europe\/Istanbul\r\n<\/code><\/pre>\n<p>Do\u011frulama:<\/p>\n<pre><code class=\"language-bash\">timedatectl\r\n<\/code><\/pre>\n<p>\u00c7\u0131kt\u0131da:<\/p>\n<pre><code>Time zone: Europe\/Istanbul (TRT, +03)\r\n<\/code><\/pre>\n<p>g\u00f6r\u00fcnmelidir.<\/p>\n<h1><strong>NTP ile Otomatik Saat Senkronizasyonu<\/strong><\/h1>\n<p>NTP (Network Time Protocol), sistem saatinin internetteki zaman sunucular\u0131yla otomatik senkronize edilmesini sa\u011flar.<br \/>\nLinux&#8217;ta do\u011fru zaman i\u00e7in NTP mutlaka a\u00e7\u0131k olmal\u0131d\u0131r.<\/p>\n<h3>NTP servisini a\u00e7mak i\u00e7in:<\/h3>\n<pre><code class=\"language-bash\">sudo timedatectl set-ntp true\r\n<\/code><\/pre>\n<p>Kontrol:<\/p>\n<pre><code class=\"language-bash\">timedatectl\r\n<\/code><\/pre>\n<p>\u00c7\u0131kt\u0131da \u015f\u00f6yle g\u00f6r\u00fcn\u00fcr:<\/p>\n<pre><code>NTP enabled: yes\r\nNTP synchronized: yes\r\n<\/code><\/pre>\n<h1><strong>NTP Servisi \u00c7al\u0131\u015fm\u0131yorsa (Chrony veya NTPD Kullan\u0131m\u0131)<\/strong><\/h1>\n<p>Baz\u0131 sistemlerde NTP servisleri (<a href=\"https:\/\/chrony-project.org\/\" target=\"_blank\" rel=\"noopener\">chronyd<\/a> veya ntpd) gereklidir.<\/p>\n<h3>Debian\/Ubuntu:<\/h3>\n<p>Chrony y\u00fckleme:<\/p>\n<pre><code class=\"language-bash\">sudo apt install chrony -y\r\n<\/code><\/pre>\n<p>Ba\u015flat:<\/p>\n<pre><code class=\"language-bash\">sudo systemctl enable --now chrony\r\n<\/code><\/pre>\n<p>Senkronizasyon kontrol\u00fc:<\/p>\n<pre><code class=\"language-bash\">chronyc tracking\r\n<\/code><\/pre>\n<h3>CentOS\/AlmaLinux\/Rocky:<\/h3>\n<p>Chrony y\u00fckle:<\/p>\n<pre><code class=\"language-bash\">sudo yum install chrony -y\r\n<\/code><\/pre>\n<p>Ba\u015flat:<\/p>\n<pre><code class=\"language-bash\">sudo systemctl enable --now chronyd\r\n<\/code><\/pre>\n<h1><strong>Donan\u0131m Saati (Hardware Clock) Senkronizasyonu<\/strong><\/h1>\n<p>Linux\u2019ta hem sistem saati hem de BIOS saati bulunur.<br \/>\nManuel bir zaman de\u011fi\u015fikli\u011fi sonras\u0131 BIOS saatini de g\u00fcncellemek gerekebilir.<\/p>\n<p>BIOS saatini g\u00fcncelle:<\/p>\n<pre><code class=\"language-bash\">sudo hwclock --systohc\r\n<\/code><\/pre>\n<p>BIOS saatini g\u00f6r\u00fcnt\u00fcle:<\/p>\n<pre><code class=\"language-bash\">sudo hwclock\r\n<\/code><\/pre>\n<h1><strong>Tarih ve Saat Sorunu Ya\u015fanan Yayg\u0131n Durumlar<\/strong><\/h1>\n<h3>\u2714 Sunucu saati bozuksa:<\/h3>\n<p>Cron g\u00f6revleri yanl\u0131\u015f zamanda tetiklenir.<\/p>\n<h3>\u2714 Log dosyalar\u0131 s\u0131ras\u0131z g\u00f6r\u00fcn\u00fcr:<\/h3>\n<p>Zaman atlamalar\u0131 nedeniyle inceleme zorla\u015f\u0131r.<\/p>\n<h3>\u2714 E-posta sorunlar\u0131:<\/h3>\n<p>SMTP timestamp hatalar\u0131 olu\u015fur, mail reject alabilir.<\/p>\n<h3>\u2714 Cluster \/ Docker \/ Kubernetes hatalar:<\/h3>\n<p>Node zamanlar\u0131 uyumsuz olursa sistemin tamam\u0131 bozulabilir.<\/p>\n<h3>\u2714 SSL\/TLS hatalar\u0131:<\/h3>\n<p>&#8220;Certificate not yet valid&#8221; veya &#8220;Expired&#8221; uyar\u0131lar\u0131 \u00e7\u0131kar.<\/p>\n<p>Do\u011fru zaman ayar\u0131 bir Linux sisteminin d\u00fczg\u00fcn \u00e7al\u0131\u015fmas\u0131 i\u00e7in temel gerekliliktir.<\/p>\n<h2><strong>Linux Tarih ve Saat Ayar\u0131 De\u011fi\u015ftirme &#8211; Sonu\u00e7<\/strong><\/h2>\n<p>Linux \u00fczerinde tarih ve saat ayar\u0131 de\u011fi\u015ftirmek olduk\u00e7a kolayd\u0131r fakat sistemin kararl\u0131 \u00e7al\u0131\u015fmas\u0131 i\u00e7in do\u011fru y\u00f6ntemlerle yap\u0131lmal\u0131d\u0131r.<br \/>\nBu rehber sayesinde:<\/p>\n<ul>\n<li>Mevcut zaman\u0131 kontrol etmeyi<\/li>\n<li>Manuel tarih\/saat ayar\u0131 yapmay\u0131<\/li>\n<li>Saat dilimi (timezone) de\u011fi\u015ftirmeyi<\/li>\n<li>NTP senkronizasyonu a\u00e7may\u0131<\/li>\n<li>BIOS saati g\u00fcncellemeyi<\/li>\n<\/ul>\n<p>ad\u0131m ad\u0131m \u00f6\u011frenmi\u015f oldunuz.<\/p>\n<p>Art\u0131k Linux sunucular\u0131n\u0131zda zaman problemlerini h\u0131zl\u0131ca \u00e7\u00f6zebilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux sunucular ve makineler \u00fczerinde do\u011fru tarih ve saat ayar\u0131n\u0131n yap\u0131lmas\u0131 olduk\u00e7a \u00f6nemlidir. \u00d6zellikle sunucu loglar\u0131, cron g\u00f6revleri, g\u00fcvenlik politikalar\u0131, SSL sertifikalar\u0131, e-posta g\u00f6nderimleri gibi kritik i\u015flemler i\u00e7in sistem saatinin do\u011fru olmas\u0131 \u015fartt\u0131r. Yanl\u0131\u015f tarih\/saat ayarlar\u0131; log karma\u015fas\u0131na, cron job hatalar\u0131na, e-posta reddine (SPF\/DKIM uyu\u015fmazl\u0131\u011f\u0131) ve hatta uygulama \u00e7\u00f6kmelerine neden olabilir. Bu rehberde Linux \u00fczerinde [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[],"class_list":["post-265","post","type-post","status-publish","format-standard","hentry","category-linux-genel"],"_links":{"self":[{"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/posts\/265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/comments?post=265"}],"version-history":[{"count":2,"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/posts\/265\/revisions"}],"predecessor-version":[{"id":268,"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/posts\/265\/revisions\/268"}],"wp:attachment":[{"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/media?parent=265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/categories?post=265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/adveyer.com\/blog\/wp-json\/wp\/v2\/tags?post=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}