{"id":29248,"date":"2025-09-10T00:45:24","date_gmt":"2025-09-09T21:45:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/"},"modified":"2025-09-10T00:45:24","modified_gmt":"2025-09-09T21:45:24","slug":"bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/","title":{"rendered":"Bash: Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtreleme"},"content":{"rendered":"

# Bash ile Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtrelemek<\/p>\n

Log dosyalar\u0131n\u0131 analiz etmek, konfig\u00fcrasyon dosyalar\u0131n\u0131 i\u015flemek veya b\u00fcy\u00fck veri k\u00fcmelerini ay\u0131klamak gibi bir\u00e7ok durumda, bir dosyan\u0131n i\u00e7inde belirli bir dizeyle ba\u015flayan sat\u0131rlar\u0131 bulman\u0131z gerekebilir. Bash komut sat\u0131r\u0131 aray\u00fcz\u00fc, bu g\u00f6revi kolayca ger\u00e7ekle\u015ftirmenize olanak tan\u0131yan g\u00fc\u00e7l\u00fc ara\u00e7lar sunar. Bu makalede, Bash kullanarak dosyalardaki belirli bir dizeyle ba\u015flayan sat\u0131rlar\u0131 filtrelemeyi ad\u0131m ad\u0131m, yeni ba\u015flayanlardan ileri seviye kullan\u0131c\u0131lara kadar, kapsaml\u0131 bir \u015fekilde ele alaca\u011f\u0131z. Farkl\u0131 yakla\u015f\u0131mlar\u0131, performans optimizasyonlar\u0131n\u0131 ve olas\u0131 sorunlar\u0131 inceleyece\u011fiz.<\/p>\n

\u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n

Bu makale, Bash ile dosya filtrelemesini \u00fc\u00e7 seviyeye ay\u0131rarak ele almaktad\u0131r:<\/p>\n

Yeni Ba\u015flayan:<\/strong> Temel grep<\/code> komutu ve basit kullan\u0131m \u00f6rnekleri.<\/p>\n

Orta Seviye:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131, grep<\/code>‘in geli\u015fmi\u015f se\u00e7enekleri ve performans optimizasyonu.<\/p>\n

\u0130leri Seviye:<\/strong> Performans analizi, karma\u015f\u0131k durumlar (edge cases) ve alternatif y\u00f6ntemler.<\/p>\n

1. Temel Kavramlar: grep<\/code> Komutu ile Tan\u0131\u015fma<\/strong><\/p>\n

Bash’te dosya i\u00e7eri\u011fini filtrelemenin en yayg\u0131n yolu, grep<\/code> (global regular expression print) komutudur. grep<\/code>, dosyalar i\u00e7inde d\u00fczenli ifadelere (regular expressions) uyan sat\u0131rlar\u0131 bulur ve ekrana yazd\u0131r\u0131r. Bizim durumumuzda, dosyadaki belirli bir dizeyle ba\u015flayan sat\u0131rlar\u0131 bulmak i\u00e7in grep<\/code>‘i kullanaca\u011f\u0131z.<\/p>\n

\u00d6rne\u011fin, log.txt<\/code> adl\u0131 bir dosyam\u0131z oldu\u011funu ve bu dosyan\u0131n i\u00e7inde “Hata:” ile ba\u015flayan sat\u0131rlar\u0131 bulmak istedi\u011fimizi varsayal\u0131m. En basit grep<\/code> komutu \u015fu \u015fekildedir:<\/p>\n

grep "Hata:" log.txt<\/code><\/pre>\n
Bu komut, log.txt<\/code> dosyas\u0131nda “Hata:” dizesini i\u00e7eren t\u00fcm sat\u0131rlar\u0131 ekrana yazd\u0131r\u0131r.  Ancak, sadece “Hata:” ile *ba\u015flayan* sat\u0131rlar\u0131 bulmak i\u00e7in ^<\/code> (caret) karakterini kullanmal\u0131y\u0131z.  Caret, d\u00fczenli ifadelerde sat\u0131r\u0131n ba\u015f\u0131n\u0131 temsil eder.<\/p>\n
grep "^Hata:" log.txt<\/code><\/pre>\n
Bu komut, sadece “Hata:” ile ba\u015flayan sat\u0131rlar\u0131 filtreleyerek bize daha hassas bir sonu\u00e7 verir.<\/p>\n
2. Nas\u0131l Yap\u0131l\u0131r?  Basit Bir \u00d6rnek<\/strong><\/p>\n
Diyelim ki, bir web sunucusunun log dosyas\u0131n\u0131 (access.log<\/code>) analiz ediyoruz ve sadece “GET” iste\u011fiyle ba\u015flayan sat\u0131rlar\u0131 g\u00f6rmek istiyoruz.  A\u015fa\u011f\u0131daki komut bunu yapacakt\u0131r:<\/p>\n
grep "^GET" access.log<\/code><\/pre>\n
Bu komut, access.log<\/code> dosyas\u0131nda “GET” ile ba\u015flayan her sat\u0131r\u0131 ekrana yazd\u0131racakt\u0131r.  Sonucu bir dosyaya y\u00f6nlendirmek i\u00e7in ><\/code> operat\u00f6r\u00fcn\u00fc kullanabiliriz:<\/p>\n
grep "^GET" access.log > get_requests.txt<\/code><\/pre>\n
Bu, “GET” isteklerini i\u00e7eren sat\u0131rlar\u0131 get_requests.txt<\/code> adl\u0131 yeni bir dosyaya kaydeder.<\/p>\n
3. Ger\u00e7ek D\u00fcnya Senaryolar\u0131 ve Optimizasyon \u0130pu\u00e7lar\u0131<\/strong><\/p>\n
\u015eimdi, daha ger\u00e7ek\u00e7i bir senaryoya bakal\u0131m.  Bir e-ticaret sitesinin log dosyas\u0131nda, belirli bir \u00fcr\u00fcn\u00fcn (\u00dcr\u00fcn Kodu: 12345<\/code>) sipari\u015fleriyle ilgili bilgileri ay\u0131klamak istedi\u011fimizi varsayal\u0131m.<\/p>\n
grep "^\u00dcr\u00fcn Kodu: 12345" order_log.txt<\/code><\/pre>\n
Bu komut, order_log.txt<\/code> dosyas\u0131nda “\u00dcr\u00fcn Kodu: 12345” ile ba\u015flayan t\u00fcm sat\u0131rlar\u0131 bulur.  Ancak, log dosyas\u0131 \u00e7ok b\u00fcy\u00fckse, bu i\u015flem zaman alabilir.  Performans\u0131 art\u0131rmak i\u00e7in birka\u00e7 teknik kullanabiliriz:<\/p>\n
* -i<\/code> se\u00e7ene\u011fi (b\u00fcy\u00fck\/k\u00fc\u00e7\u00fck harf duyars\u0131zl\u0131\u011f\u0131):<\/strong>  E\u011fer b\u00fcy\u00fck\/k\u00fc\u00e7\u00fck harf duyarl\u0131l\u0131\u011f\u0131 \u00f6nemli de\u011filse, -i<\/code> se\u00e7ene\u011fini kullanarak aramay\u0131 h\u0131zland\u0131rabilirsiniz:<\/p>\n
grep -i "^\u00fcr\u00fcn kodu: 12345" order_log.txt<\/code><\/pre>\n
* -n<\/code> se\u00e7ene\u011fi (sat\u0131r numaralar\u0131):<\/strong>  Bulunan sat\u0131rlar\u0131n dosyadaki numaralar\u0131n\u0131 g\u00f6rmek i\u00e7in -n<\/code> se\u00e7ene\u011fini kullanabilirsiniz:<\/p>\n
grep -n "^\u00dcr\u00fcn Kodu: 12345" order_log.txt<\/code><\/pre>\n
* -c<\/code> se\u00e7ene\u011fi (e\u015fle\u015fme say\u0131s\u0131):<\/strong> Sadece ka\u00e7 sat\u0131r\u0131n e\u015fle\u015fti\u011fini g\u00f6rmek i\u00e7in -c<\/code> se\u00e7ene\u011fini kullan\u0131n:<\/p>\n
grep -c "^\u00dcr\u00fcn Kodu: 12345" order_log.txt<\/code><\/pre>\n
4.  \u0130leri Seviye Teknikler: Performans Analizi ve Karma\u015f\u0131k Durumlar<\/strong><\/p>\n
\u00c7ok b\u00fcy\u00fck dosyalarla \u00e7al\u0131\u015f\u0131rken, grep<\/code>‘in performans\u0131 \u00f6nemli bir fakt\u00f6r haline gelir.  Bu durumda, ripgrep<\/code> (rg) gibi daha h\u0131zl\u0131 alternatifleri kullanabilirsiniz. ripgrep<\/code>, grep<\/code>‘ten \u00e7ok daha h\u0131zl\u0131 \u00e7al\u0131\u015f\u0131r ve daha geli\u015fmi\u015f \u00f6zelliklere sahiptir.  ripgrep<\/code>‘i kurmak i\u00e7in sisteminizin paket y\u00f6neticisini kullanabilirsiniz (\u00f6rne\u011fin, Debian\/Ubuntu’da apt install ripgrep<\/code>).  Kullan\u0131m\u0131 grep<\/code>‘e benzer:<\/p>\n
rg "^\u00dcr\u00fcn Kodu: 12345" order_log.txt<\/code><\/pre>\n
Karma\u015f\u0131k durumlar i\u00e7in, d\u00fczenli ifadelerin g\u00fcc\u00fcnden yararlanabilirsiniz.  \u00d6rne\u011fin, belirli bir tarih aral\u0131\u011f\u0131nda ger\u00e7ekle\u015fen “Hata:” ile ba\u015flayan log kay\u0131tlar\u0131n\u0131 filtrelemek isteyebilirsiniz.  Bu durumda, daha karma\u015f\u0131k bir d\u00fczenli ifade kullanman\u0131z gerekebilir.  Bu konuda daha detayl\u0131 bilgi i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) adresindeki d\u00fczenli ifadeler hakk\u0131ndaki makalelere g\u00f6z atabilirsiniz (buraya bir makale ba\u011flant\u0131s\u0131 eklenecektir).<\/p>\n
5.  Vaka Analizi:  Bir Sistem Log Dosyas\u0131n\u0131n Analizi<\/strong><\/p>\n
Diyelim ki, bir sunucunun sistem log dosyas\u0131nda (syslog<\/code>) belirli bir hatan\u0131n (kernel panic<\/code>) kayd\u0131n\u0131 bulmak istiyoruz.  Log dosyas\u0131 \u00e7ok b\u00fcy\u00fck ve d\u00fczensiz olabilir.  Bu durumda, grep<\/code>‘in -r<\/code> (recursive) se\u00e7ene\u011fini kullanarak alt dizinleri de arayabiliriz ve ayn\u0131 zamanda -i<\/code> se\u00e7ene\u011fiyle b\u00fcy\u00fck\/k\u00fc\u00e7\u00fck harf duyarl\u0131l\u0131\u011f\u0131n\u0131 kald\u0131rabiliriz:<\/p>\n
grep -ri "^kernel panic" \/var\/log\/<\/code><\/pre>\n
Bu komut, \/var\/log\/<\/code> dizini ve alt dizinlerinde “kernel panic” ile ba\u015flayan t\u00fcm sat\u0131rlar\u0131 bulur.  Ancak, bu i\u015flem \u00e7ok zaman alabilir.  Bu nedenle, \u00f6ncelikle arama kriterlerini daraltmak ve sadece ilgili log dosyalar\u0131n\u0131 incelemek daha verimli olacakt\u0131r.<\/p>\n
6.  Performans Optimizasyonu:  H\u0131zl\u0131 Filtreleme Teknikleri<\/strong><\/p>\n
B\u00fcy\u00fck dosyalarda filtreleme performans\u0131n\u0131 iyile\u015ftirmek i\u00e7in \u015funlar\u0131 yapabilirsiniz:<\/p>\n
* grep<\/code> yerine ripgrep<\/code> veya ag<\/code> (the silver searcher) kullan\u0131n.<\/strong>  Bu ara\u00e7lar genellikle \u00e7ok daha h\u0131zl\u0131d\u0131r.
\n* -P<\/code> se\u00e7ene\u011fiyle Perl d\u00fczenli ifadelerini kullan\u0131n.<\/strong>  Perl d\u00fczenli ifadeleri, daha karma\u015f\u0131k e\u015fle\u015ftirmeler i\u00e7in daha g\u00fc\u00e7l\u00fc ve verimli olabilir.
\n* Dosyay\u0131 \u00f6nceden s\u0131ralay\u0131n.<\/strong>  E\u011fer dosya d\u00fczenliyse ve \u00f6nceden s\u0131ralanm\u0131\u015fsa, ikili arama gibi daha h\u0131zl\u0131 arama algoritmalar\u0131 kullan\u0131labilir.
\n* Paralel i\u015flem kullan\u0131n.<\/strong>  B\u00fcy\u00fck dosyalar\u0131 par\u00e7alara b\u00f6l\u00fcp her par\u00e7ay\u0131 ayr\u0131 bir i\u015flemde i\u015fleyerek filtreleme i\u015flemini h\u0131zland\u0131rabilirsiniz.  parallel<\/code> komutu bu ama\u00e7la kullan\u0131labilir.<\/p>\n
7.  Alternatif Y\u00f6ntemler:  awk<\/code> ve sed<\/code><\/strong><\/p>\n
grep<\/code> d\u0131\u015f\u0131nda, awk<\/code> ve sed<\/code> gibi g\u00fc\u00e7l\u00fc komutlar da dosya filtrelemesi i\u00e7in kullan\u0131labilir.  awk<\/code>, daha karma\u015f\u0131k veri i\u015fleme yetenekleri sunar ve sed<\/code>, sat\u0131rlar\u0131 d\u00fczenlemek i\u00e7in idealdir.  \u00d6rne\u011fin, sadece “Hata:” ile ba\u015flayan sat\u0131rlar\u0131 ekrana yazd\u0131rmak i\u00e7in awk<\/code> \u015fu \u015fekilde kullan\u0131labilir:<\/p>\n
awk '\/^Hata:\/ {print}' log.txt<\/code><\/pre>\n
Sonu\u00e7<\/strong><\/p>\n
Bu makalede, Bash kullanarak dosyalardaki belirli bir dizeyle ba\u015flayan sat\u0131rlar\u0131 filtrelemenin \u00e7e\u015fitli y\u00f6ntemlerini inceledik.  Yeni ba\u015flayanlardan ileri seviye kullan\u0131c\u0131lara kadar farkl\u0131 seviyelerdeki kullan\u0131c\u0131lar i\u00e7in pratik \u00f6rnekler ve optimizasyon ipu\u00e7lar\u0131 sunduk.  grep<\/code>, ripgrep<\/code>, awk<\/code> ve sed<\/code> gibi ara\u00e7lar\u0131n g\u00fc\u00e7l\u00fc \u00f6zelliklerini kullanarak, b\u00fcy\u00fck veri k\u00fcmelerini verimli bir \u015fekilde i\u015fleyebilir ve analiz edebilirsiniz.  Unutmay\u0131n ki, performans, \u00f6zellikle b\u00fcy\u00fck dosyalarla \u00e7al\u0131\u015f\u0131rken, \u00f6nemli bir fakt\u00f6rd\u00fcr ve do\u011fru ara\u00e7lar\u0131 ve teknikleri se\u00e7mek verimlili\u011fi art\u0131r\u0131r.<\/p>\n
S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n
1. grep<\/code> komutu \u00e7al\u0131\u015fm\u0131yor. Neden?<\/strong>  Dosya yolunu do\u011fru yazd\u0131\u011f\u0131n\u0131zdan ve dosyan\u0131n okuma izniniz oldu\u011fundan emin olun.
\n2. \u00c7ok b\u00fcy\u00fck bir dosyay\u0131 filtrelemek i\u00e7in en iyi y\u00f6ntem nedir?<\/strong> ripgrep<\/code> veya ag<\/code> gibi daha h\u0131zl\u0131 ara\u00e7lar\u0131 kullanmay\u0131 ve paralel i\u015flemi d\u00fc\u015f\u00fcnmeyi deneyin.
\n3. D\u00fczenli ifadeler nas\u0131l kullan\u0131l\u0131r?<\/strong>  D\u00fczenli ifadeler karma\u015f\u0131k bir konudur.  Daha detayl\u0131 bilgi i\u00e7in online kaynaklara veya [fatihsoysal.com](https:\/\/fatihsoysal.com)’daki (buraya bir makale ba\u011flant\u0131s\u0131 eklenecektir) ilgili makalelere bakabilirsiniz.
\n4. grep<\/code>‘in di\u011fer se\u00e7enekleri nelerdir?<\/strong>  grep<\/code>‘in bir\u00e7ok se\u00e7ene\u011fi vard\u0131r.  man grep<\/code> komutuyla t\u00fcm se\u00e7enekleri inceleyebilirsiniz.
\n5. awk<\/code> ve sed<\/code> ne zaman kullan\u0131lmal\u0131d\u0131r?<\/strong>  awk<\/code>, daha karma\u015f\u0131k veri i\u015fleme i\u00e7in; sed<\/code>, sat\u0131rlar\u0131 d\u00fczenlemek i\u00e7in daha uygundur.<\/p>\n
Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# Bash ile Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtrelemek Log dosyalar\u0131n\u0131 analiz etmek, konfig\u00fcrasyon dosyalar\u0131n\u0131 i\u015flemek veya b\u00fcy\u00fck…","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1328],"tags":[],"class_list":{"0":"post-29248","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-bash","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nBash: Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtreleme<\/title>\n<meta name=\"description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bash: Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtreleme\" \/>\n<meta property=\"og:description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-09T21:45:24+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Bash: Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtreleme\",\"datePublished\":\"2025-09-09T21:45:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\"},\"wordCount\":1196,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"articleSection\":[\"Bash\"],\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\",\"name\":\"Bash: Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtreleme\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-09-09T21:45:24+00:00\",\"description\":\"Hi\u00e7bir etiketi bulunamad\u0131.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/bash-belirli-bir-dizeyle-baslayan-satirlari-filtreleme\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Bash: Belirli Bir Dizeyle Ba\u015flayan Sat\u0131rlar\u0131 Filtreleme\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - 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