{"id":3110,"date":"2021-01-06T17:34:45","date_gmt":"2021-01-06T14:34:45","guid":{"rendered":"https:\/\/blog.hostixo.com\/?p=3110"},"modified":"2021-04-15T12:55:09","modified_gmt":"2021-04-15T09:55:09","slug":"linux-da-sifre-degistirme-islemi","status":"publish","type":"post","link":"https:\/\/www.hostixo.com\/blog\/linux-da-sifre-degistirme-islemi\/","title":{"rendered":"Linux da \u015eifre De\u011fi\u015ftirme \u0130\u015flemi"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0130\u00e7indekiler \u2714<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u0130\u00e7indekiler Tablosunu A\u00e7\/Kapat\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.hostixo.com\/blog\/linux-da-sifre-degistirme-islemi\/#Linux_da_Sifreler\" >Linux da \u015eifreler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.hostixo.com\/blog\/linux-da-sifre-degistirme-islemi\/#Sifre_Degistirilirken_Dikkat_Edilmesi_Gerekenler\" >\u015eifre De\u011fi\u015ftirilirken Dikkat Edilmesi Gerekenler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.hostixo.com\/blog\/linux-da-sifre-degistirme-islemi\/#Linux_Sifre_Degistirme_Islemi\" >Linux \u015eifre De\u011fi\u015ftirme \u0130\u015flemi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.hostixo.com\/blog\/linux-da-sifre-degistirme-islemi\/#Baska_Bir_Kullanici_Icin_Linux_Sifre_Degistirme\" >Ba\u015fka Bir Kullan\u0131c\u0131 \u0130\u00e7in Linux \u015eifre De\u011fi\u015ftirme<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.hostixo.com\/blog\/linux-da-sifre-degistirme-islemi\/#Sonuc\" >Sonu\u00e7<\/a><\/li><\/ul><\/nav><\/div>\n<p>\u015eifre kullanmak g\u00fcnl\u00fck hayat\u0131m\u0131z i\u00e7in ve web <a href=\"https:\/\/www.hostixo.com\/hosting\/hazir-site\/\" data-internallinksmanager029f6b8e52c=\"11\" title=\"haz\u0131r site\">site<\/a>lerimiz i\u00e7in g\u00fcvenlik a\u00e7\u0131s\u0131nda \u00e7ok \u00f6nemli bir yere sahiptir. Web sitelerimiz i\u00e7in \u015fifresiz SSH kullanmak g\u00fcvenilir bir tercihtir fakat yinede g\u00fc\u00e7l\u00fc bir \u015fifre tercih etmek \u00e7ok daha do\u011fru bir tercih olacakt\u0131r. <a href=\"https:\/\/www.hostixo.com\/\">G\u00fc\u00e7l\u00fc<\/a> bir \u015fifreye sahip olmak sisteminizin de son derece g\u00fcvenli olmas\u0131n\u0131 sa\u011flayacakt\u0131r. Bu yaz\u0131m\u0131zda sizlere Linux da \u015fifre de\u011fi\u015ftirme konusundan bahsedece\u011fiz.<\/p>\n<p>Ayr\u0131ca <a href=\"https:\/\/www.hostixo.com\/sunucu\/sanal-sunucu\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"vps sat\u0131n al\">VPS<\/a>\u2019inizdeki di\u011fer kullan\u0131c\u0131lar i\u00e7in \u015fifre de\u011fi\u015ftirme konusundan da bahsedece\u011fiz. E\u011fer bir sistem y\u00f6neticisi olmay\u0131 d\u00fc\u015f\u00fcn\u00fcyorsan\u0131z bunu \u00f6\u011frenmeniz sizin i\u00e7in \u00e7ok iyi olacakt\u0131r.<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-3113 size-full lazyload\" data-src=\"https:\/\/www.hostixo.com\/blog\/wp-content\/uploads\/2021\/01\/linuxsecurity.png\" alt=\"Linux da \u015eifre De\u011fi\u015ftirme \u0130\u015flemi\" width=\"650\" height=\"349\" title=\"\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 650px; --smush-placeholder-aspect-ratio: 650\/349;\"><noscript><img decoding=\"async\" class=\"alignnone wp-image-3113 size-full\" src=\"https:\/\/www.hostixo.com\/blog\/wp-content\/uploads\/2021\/01\/linuxsecurity.png\" alt=\"Linux da \u015eifre De\u011fi\u015ftirme \u0130\u015flemi\" width=\"650\" height=\"349\" title=\"\"><\/noscript><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Linux_da_Sifreler\"><\/span><span id=\"Sifreler-ve-Linux\">Linux da \u015eifreler<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0130\u015flemlerin yap\u0131lma y\u00f6nteminden dolay\u0131 Linux, D\u00fcnya\u2019daki en g\u00fc\u00e7l\u00fc i\u015fletim sistemlerinden biri olarak bilinmektedir. Fakat, t\u00fcm i\u015fletim sistemleri her zaman \u015fifre kullanmaya ihtiya\u00e7 duyar. Linux da bulunan \u015fifreler di\u011fer sistemlere benzer \u015fekilde y\u00f6netilir. Fakat, \u015fifre y\u00f6netim i\u015fleminde iki \u00f6nemli dizini bilmek gerekiyor.<\/p>\n<p>Bu dizinlerden birincisi sistemdeki t\u00fcm kullan\u0131c\u0131lar\u0131 bulman\u0131z\u0131 sa\u011flayan <strong>\/etc\/<\/strong><strong>passwd\u00a0<\/strong>dizinidir. Ayr\u0131ca kullan\u0131c\u0131lar\u0131n sistem de hangi gruba ait olduklar\u0131n\u0131 da g\u00f6sterir. \u00c7ok say\u0131da kullan\u0131c\u0131n\u0131n g\u00f6r\u00fclmesi m\u00fcmk\u00fcnd\u00fcr fakat yaln\u0131zca baz\u0131 kullan\u0131c\u0131lar sistem kullan\u0131c\u0131lar\u0131 olduklar\u0131 i\u00e7in giri\u015f yapabilirler.<\/p>\n<p>S\u0131radan bir kullan\u0131c\u0131 olarak, yaln\u0131zca kendi \u015fifrenizi de\u011fi\u015ftirmeniz m\u00fcmk\u00fcnd\u00fcr. Fakat k\u00f6k kullan\u0131c\u0131 ve sudo ayr\u0131cal\u0131klar\u0131na sahip olan kullan\u0131c\u0131lar, ba\u015fka bir kullan\u0131c\u0131n\u0131n \u015fifrelerini de de\u011fi\u015ftirebilir.<span id=\"ezoic-pub-ad-placeholder-139\" class=\"ezoic-adpicker-ad\"><\/span><span id=\"div-gpt-ad-linuxize_com-box-3-0\" class=\"ezoic-ad ezfound\" data-google-query-id=\"CKLnovLphu4CFXODgwcdQlgMjQ\"><\/span><\/p>\n<p>E\u011fer \/<strong>etc\/passwd\u00a0<\/strong>dizininin i\u00e7eri\u011fini g\u00f6rmek istiyorsan\u0131z a\u015fa\u011f\u0131daki komutu uygulaman\u0131z gerekiyor:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"minimal\">cat \/etc\/passwd<\/pre>\n<p>&nbsp;<\/p>\n<p>\u015eifrelerle ilgili bilinmesi gereken ikinci Linux dizini ise <strong>\/etc\/shadow\u00a0<\/strong>dizinidir. Shadow dosyas\u0131n\u0131n i\u00e7inde kullan\u0131c\u0131lar\u0131n \u015fifrelenmi\u015f parolalar\u0131n\u0131 ve SSH anahtar\u0131na sahip olup olmad\u0131klar\u0131 yer almaktad\u0131r bu klas\u00f6re giri\u015f yap\u0131larak g\u00f6r\u00fclmektedir.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"minimal\">cat \/etc\/shadow<\/pre>\n<p>&nbsp;<\/p>\n<p>Unutmay\u0131n ki g\u00fc\u00e7l\u00fc bir \u015fifreye sahipseniz e\u011fer kimse \u015fifrelerinizi tahmin edemez ya da kaba kuvvete ba\u015fvurmaz. Fakat \u015fifrelerinizin tehlikede oldu\u011funu d\u00fc\u015f\u00fcn\u00fcrseniz e\u011fer kesinlikle de\u011fi\u015ftirmelisiniz. Bunu s\u0131kl\u0131kla yapman\u0131z \u00f6nerilir!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sifre_Degistirilirken_Dikkat_Edilmesi_Gerekenler\"><\/span>\u015eifre De\u011fi\u015ftirilirken Dikkat Edilmesi Gerekenler<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Linux da \u015fifre de\u011fi\u015ftirme i\u015fleminde genel bir kural olarak, \u015fifreler a\u015fa\u011f\u0131daki setlerin her birinden bir veya daha fazlas\u0131 dahil olmak \u00fczere 10 ila 20 karakterden olu\u015fmal\u0131d\u0131r:<\/p>\n<ol>\n<li>K\u00fc\u00e7\u00fck harf i\u00e7ermeli<\/li>\n<li>B\u00fcy\u00fck harf i\u00e7ermeli<\/li>\n<li>0-9 aras\u0131 rakamlar i\u00e7ermeli<\/li>\n<li>Noktalama i\u015faretleri i\u00e7ermeli<\/li>\n<\/ol>\n<p>Parola g\u00fcvenli\u011findeki tehlikeler genellikle dikkatsiz parola se\u00e7iminden kaynaklan\u0131r.\u00a0A\u015fa\u011f\u0131dakiler gibi yayg\u0131n parolalardan ka\u00e7\u0131n\u0131n:<\/p>\n<ol>\n<li>Bir s\u00f6zl\u00fckte g\u00f6r\u00fcnen kelimeler<\/li>\n<li>Ad\u0131n\u0131z ve soyad\u0131n\u0131z<\/li>\n<li>Evcil Hayvan isimleri<\/li>\n<li>\u00c7ocuklar veya e\u015flerin isimleri<\/li>\n<li>Lisans numaras\u0131<\/li>\n<li>Do\u011fum tarihi<\/li>\n<li>Telefon numaralar\u0131<\/li>\n<li>Ev veya ofis adresi<\/li>\n<\/ol>\n<p>Yukar\u0131da bahsetti\u011fimiz bilgiler \u015fifrenizin tahmin edilmesini kolayla\u015ft\u0131r\u0131r ve hesab\u0131n\u0131z risk alt\u0131na girebilir.<\/p>\n<ul>\n<li>\u015eifrenizi yaln\u0131zca sizin g\u00f6rebilece\u011finiz ve g\u00fcvenli bir yere not ederek unuttu\u011funuz zaman hat\u0131rlaman\u0131za yard\u0131mc\u0131 olur b\u00f6ylece \u015fifre de\u011fi\u015fikli\u011fi ile zaman kaybetmemi\u015f olursunuz.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Linux_Sifre_Degistirme_Islemi\"><\/span><span id=\"Linux-Sifre-Degistirme-Nasil-Yapilir\">Linux \u015eifre De\u011fi\u015ftirme \u0130\u015flemi<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u015eifre de\u011fi\u015ftirirken, g\u00fc\u00e7l\u00fc ve benzersiz bir parola kulland\u0131\u011f\u0131n\u0131zdan emin olun. Unix de \u015fifre de\u011fi\u015fikli\u011fi i\u00e7in bilinmesi gereken sadece tek bir komut vard\u0131r. S\u0131radan bir kullan\u0131c\u0131 da olsan\u0131z bu ayn\u0131d\u0131r. \u0130lk yapman\u0131z gereken \u015fey SSH \u00fczerinden VPS\u2019inize eri\u015fmektir. Daha sonras\u0131nda Linux\u2019da \u015fifre de\u011fi\u015fikli\u011fi yapmak i\u00e7in terminali a\u00e7arak a\u015fa\u011f\u0131da yer alan komutu girmeniz gerekiyor:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"shell\" data-enlighter-theme=\"minimal\">sudo passwd<\/pre>\n<p>&nbsp;<\/p>\n<p>Komutu girdikten sonra ilk olarak mevcut kulland\u0131\u011f\u0131n\u0131z \u015fifre istenecektir daha sonra ise belirledi\u011finiz yeni \u015fifreyi iki kez girmeniz istenecektir yeni \u015fifrenizi girdikten sonra onaylayarak i\u015flemi tamamlam\u0131\u015f olacaks\u0131n\u0131z. Bu durumda bir kullan\u0131c\u0131 belirlemedi\u011finizden dolay\u0131 k\u00f6k \u015fifresini de\u011fi\u015ftirmi\u015f olacaks\u0131n\u0131z.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Baska_Bir_Kullanici_Icin_Linux_Sifre_Degistirme\"><\/span><span id=\"Baska-Bir-Kullanici-Icin-Linux-Sifre-Degistirme-Nasil-Yapilir\">Ba\u015fka Bir Kullan\u0131c\u0131 \u0130\u00e7in Linux \u015eifre De\u011fi\u015ftirme<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ayn\u0131 sistemde farkl\u0131 bir kullan\u0131c\u0131n\u0131n \u015fifresini de\u011fi\u015ftirmek de m\u00fcmk\u00fcnd\u00fcr. Bu i\u015flemi yapmak i\u00e7in ise yukar\u0131da bahsetti\u011fimiz gibi k\u00f6k kullan\u0131c\u0131s\u0131 olarak giri\u015f yapm\u0131\u015f olmal\u0131s\u0131n\u0131z. Ayr\u0131ca kullan\u0131c\u0131 ad\u0131n\u0131 passwd komutuna eklemeniz gerekmektedir. Ayn\u0131 \u015fekilde ilk mevcutta kullan\u0131lan \u015fifrenin girilmesi istenecektir daha sonra ise belirlenen \u015fifrenin iki kez girilmesi istenecektir. Komut sat\u0131r\u0131ndaki \u00f6rnek bir komut a\u015fa\u011f\u0131da belirtildi\u011fi gibi olacakt\u0131r.<\/p>\n<pre>passwd kullanici_adi<\/pre>\n<p>\u015eimdi biz g\u00f6sterece\u011fimiz \u00f6rnekte ahmet adl\u0131 kullan\u0131c\u0131n\u0131n \u015fifresinde de\u011fi\u015fiklik yapaca\u011f\u0131z.<\/p>\n<pre>passwd ahmet<\/pre>\n<p>\u0130\u015fte \u015fifre de\u011fi\u015ftirmek bu kadar basit bir i\u015flemdir.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sonuc\"><\/span>Sonu\u00e7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Linux \u015fifre de\u011fi\u015ftirme i\u015flemi g\u00fcvenlik a\u00e7\u0131s\u0131ndan \u00e7ok \u00f6nemlidir. \u0130\u015flem son derece kolayd\u0131r ve bu i\u015flem maksimum g\u00fcvenlik i\u00e7in s\u0131k s\u0131k uygulanmas\u0131 gerekmektedir.<\/p>\n<p>Linux da \u015eifre Nas\u0131l De\u011fi\u015ftirilir ?\u00a0ba\u015fl\u0131kl\u0131 yaz\u0131m\u0131z ile ilgili akl\u0131n\u0131za tak\u0131lan sorular\u0131n\u0131z\u0131n yan\u0131t\u0131n\u0131 alabilmeniz i\u00e7in veya \u00f6neride bulunabilmeniz i\u00e7in a\u015fa\u011f\u0131da yer alan yorumlar k\u0131sm\u0131n\u0131 kullanarak bizimle ileti\u015fime ge\u00e7ebilirsiniz.<\/p>\n<p>Dilerseniz daha \u00f6nce blo\u011fumuzda payla\u015ft\u0131\u011f\u0131m\u0131z <a href=\"https:\/\/www.hostixo.com\/blog\/cpanel-nedir-hostixo-cpanel-lisanslari\/\">cPanel Nedir ? cPanele Nas\u0131l Giri\u015f Yap\u0131l\u0131r ? Hostixo cPanel Lisanslar\u0131<\/a>\u00a0ba\u015fl\u0131kl\u0131 yaz\u0131m\u0131z\u0131 da okuyabilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u015eifre kullanmak g\u00fcnl\u00fck hayat\u0131m\u0131z i\u00e7in ve web sitelerimiz i\u00e7in g\u00fcvenlik a\u00e7\u0131s\u0131nda \u00e7ok \u00f6nemli bir yere sahiptir. Web sitelerimiz i\u00e7in \u015fifresiz SSH kullanmak g\u00fcvenilir bir tercihtir fakat yinede g\u00fc\u00e7l\u00fc bir \u015fifre tercih etmek \u00e7ok daha do\u011fru bir tercih olacakt\u0131r. G\u00fc\u00e7l\u00fc bir \u015fifreye sahip olmak sisteminizin de son derece g\u00fcvenli olmas\u0131n\u0131 sa\u011flayacakt\u0131r. Bu yaz\u0131m\u0131zda sizlere Linux da &hellip;<\/p>\n","protected":false},"author":1,"featured_media":3115,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[29],"tags":[],"class_list":["post-3110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/posts\/3110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/comments?post=3110"}],"version-history":[{"count":0,"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/posts\/3110\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/media\/3115"}],"wp:attachment":[{"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/media?parent=3110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/categories?post=3110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hostixo.com\/blog\/wp-json\/wp\/v2\/tags?post=3110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}