{"id":669,"date":"2009-10-01T16:03:09","date_gmt":"2009-10-01T14:03:09","guid":{"rendered":"http:\/\/michauko.org\/blog\/?p=669"},"modified":"2009-11-24T17:40:00","modified_gmt":"2009-11-24T15:40:00","slug":"netcat-je-detar-dune-machine-vers-lautre","status":"publish","type":"post","link":"https:\/\/michauko.org\/blog\/netcat-je-detar-dune-machine-vers-lautre-669\/","title":{"rendered":"netcat : je \u00ab\u00a0d\u00e9TAR\u00a0\u00bb d’une machine vers l’autre"},"content":{"rendered":"

\u00ab\u00a0d\u00e9TAR\u00a0\u00bb \u00e0 distance<\/h1>\n

Pense-b\u00eate : j’ai un gros .tar sur un serveur, je dois l’extraire sur un autre serveur. MAIS, sur cet autre serveur, je n’ai pas la place pour r\u00e9cup\u00e9rer le .tar puis le d\u00e9compresser, c’est-\u00e0-dire stocker deux fois en terme d’espace.
\nDonc j’utilise netcat pour faire un \u00ab\u00a0pipe\u00a0\u00bb entre commande d’une machine \u00e0 l’autre.<\/p>\n

Une fois le programme netcat install\u00e9, peu importe par quel biais, et en consid\u00e9rant que vous n’avez pas de restriction r\u00e9seau entre les 2 machines (sinon ouvrez le port ci-dessous en UDP), vous faites ceci :<\/p>\n

Sur la machine cible, on pr\u00e9pare une socket en \u00e9coute, ici sur le port 12345 :<\/p>\n

moi@destination:\/ou\/je\/veux\/ecrire$ netcat -l -p 12345 | tar xvf -<\/pre>\n
Sur la machine \u00e9mettrice, on balance la pur\u00e9e dans le tuyau :<\/p>\n
moi2@source:~$ cat monfichier.tar | netcat aladdin 12345<\/pre>\n
A adapter dans le cas d’un fichier .bz2 ou .gz, par exemple.<\/p>\n
Recopie d’arborescence d’un serveur \u00e0 l’autre<\/h1>\n
Une autre utilisation tr\u00e8s courante est la suivante : recopier une arborescence d’un serveur \u00e0 l’autre, sans utiliser rsync, scp etc. Pourquoi se passer de ces outils ? il y a des cas o\u00f9 on ne les a pas. Et puis l\u00e0 on \u00e9vite le cryptage, tout \u00e7a, charge CPU, blablabla.
\nCa donne :<\/p>\n
dest$ nc -l p 12345 | tar x<\/pre>\n
src$ tar cvf - mon_arborescence | nc dest 12345<\/pre>\n
EDIT : truc bien crade : \u00e7a marche aussi pour injecter du SQL…<\/h1>\n
dest$ nc -l p 12345 | mysql -u monlogin -p<\/pre>\n
src$ cat test.sql | nc dest 12345<\/pre>\n
Attention \u00e0 ce que vous faites l\u00e0 quand m\u00eame.
\nNotez qu’au lancement de la commande sur la machine de destination, le mot de passe mysql est demand\u00e9 tout de suite.<\/p>\n
Voil\u00e0
\nA+<\/p>\n","protected":false},"excerpt":{"rendered":"
\u00ab\u00a0d\u00e9TAR\u00a0\u00bb \u00e0 distance Pense-b\u00eate : j’ai un gros .tar sur un serveur, je dois l’extraire sur un autre serveur. MAIS, sur cet autre serveur, je n’ai pas la place pour r\u00e9cup\u00e9rer le .tar puis le …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2,387,82,83],"tags":[376,377,378],"class_list":["post-669","post","type-post","status-publish","format-standard","hentry","category-debian","category-ligne-de-commande","category-pl","category-ubuntu","tag-netcat","tag-rsync","tag-scp"],"yoast_head":"\nnetcat : je "d\u00e9TAR" d'une machine vers l'autre - Le blog de Michauko<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/michauko.org\/blog\/netcat-je-detar-dune-machine-vers-lautre-669\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"netcat : je "d\u00e9TAR" d'une machine vers l'autre - Le blog de Michauko\" \/>\n<meta property=\"og:description\" content=\"\u00ab\u00a0d\u00e9TAR\u00a0\u00bb \u00e0 distance Pense-b\u00eate : j’ai un gros .tar sur un serveur, je dois l’extraire sur un autre serveur. 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