{"id":1531,"date":"2021-01-31T19:27:14","date_gmt":"2021-01-31T17:27:14","guid":{"rendered":"https:\/\/www.digitalni-sebeobrana.cz\/?p=1531"},"modified":"2021-08-05T22:49:49","modified_gmt":"2021-08-05T20:49:49","slug":"killswitch-pro-linux","status":"publish","type":"post","link":"https:\/\/www.digitalnisebeobrana.cz\/en\/killswitch-pro-linux\/","title":{"rendered":"Killswitch pro Linux"},"content":{"rendered":"

Ob\u010das se m\u016f\u017ee hodit mo\u017enost rychle vypnout po\u010d\u00edta\u010d. Zde jsou dva p\u0159\u00edklady, jak to ud\u011blat.<\/p>\n

<\/p>\n

Kl\u00e1vesov\u00e1 zkratka<\/h2>\n
    \n
  1. V textov\u00e9m editoru vytvo\u0159\u00edme skript, kter\u00fd zavol\u00e1 okam\u017eit\u00e9 vypnut\u00ed po\u010d\u00edta\u010de. Pro otestov\u00e1n\u00ed prozat\u00edm zakomentujeme p\u0159\u00edkaz pro vypnut\u00ed a vlo\u017e\u00edme k\u00f3d pro zaps\u00e1n\u00ed textu do souboru killswitch.sh<\/code>:
    \n#!\/bin\/bash
    \nt=$(date);
    \necho $t > \/home\/ross\/tools\/killswitch\/test;
    \n#sudo poweroff -f
    \n<\/code><\/li>\n
  2. Pomoc\u00ed p\u0159\u00edkazu chmod nastav\u00edme pr\u00e1vo pro spu\u0161t\u011bn\u00ed:
    \n$ chmod +x .\/killswitch.sh<\/code><\/li>\n
  3. Zkontrolujeme pr\u00e1va:
    \n$ ls -al
    \ntotal 12<\/code>
    \ndrwx------ 2 ross ross 4096 31. led 16.23 .<\/code>
    \ndrwx------ 5 ross ross 4096 26. led 15.35 ..<\/code>
    \n-rwx------ 1 ross ross 100 31. led 16.17 killswitch.sh
    \n<\/code><\/li>\n
  4. Nast\"\"<\/a>av\u00edme kl\u00e1vesovou zkratku, kter\u00e1 zavol\u00e1 n\u00e1\u0161 skript. Toto se m\u016f\u017ee li\u0161it podle prost\u0159ed\u00ed. Toto je p\u0159\u00edklad pro Gnome: Settings -> Keyboard Shortcuts -> + (\u00fapln\u011b dole)\n
      \n
    1. Name: cokoliv<\/li>\n
    2. Command: Cesta k na\u0161emu skriptu<\/li>\n
    3. Shortcut: po kliknut\u00ed stiskn\u011bte po\u017eadovanou kl\u00e1vesovou zkratku<\/li>\n
    4. Klikn\u011bte na “Add”<\/li>\n<\/ol>\n<\/li>\n
    5. Test: stiskn\u011bte vybranou kl\u00e1vesovou zkratku. Nov\u011b vytvo\u0159en\u00fd soubor test by m\u011bl obsahovat aktu\u00e1ln\u00ed \u010das. Pokud ne, n\u011bco je \u0161patn\u011b:)<\/li>\n
    6. Uprav\u00edme skript pro “ostr\u00fd provoz”:
      \n#!\/bin\/bash<\/code>
      \n#t=$(date;echo $USER);<\/code>
      \n#echo $t > \/home\/ross\/tools\/killswitch\/test;<\/code>
      \nsudo poweroff -f<\/code><\/li>\n
    7. Pro zavol\u00e1n\u00ed p\u0159\u00edkazu sudo poweroff -f<\/code> jsou pot\u0159eba administr\u00e1torsk\u00e1 pr\u00e1va. To m\u016f\u017eeme obej\u00edt vlo\u017een\u00edm nasleduj\u00edc\u00edho \u0159\u00e1dku do souboru \/etc\/sudoers<\/code>:
      \nross ALL = NOPASSWD: \/sbin\/poweroff<\/code>
      \n(poweroff -f<\/code> zabr\u00e1n\u00ed vyskakov\u00e1n\u00ed potvrzovac\u00edch oken a vypne po\u010d\u00edta\u010d okam\u017eit\u011b)<\/em><\/li>\n
    8. Ulo\u017e\u00edme rozd\u011blanou pr\u00e1ci a otestujeme kl\u00e1vesovou zkratku.<\/li>\n<\/ol>\n
      \n

       <\/p>\n

      \u00a0Vypnut\u00ed po odpojen\u00ed USB za\u0159\u00edzen\u00ed<\/h2>\n
        \n
      1. P\u0159ipoj\u00edme do USB portu za\u0159\u00edzen\u00ed, kter\u00e9 chceme pou\u017e\u00edt jako n\u00e1\u0161 killswitch.<\/li>\n
      2. Spust\u00edme monitoring p\u0159ipojen\u00ed za\u0159\u00edzen\u00ed:
        \n$ udevadm monitor --property<\/code><\/li>\n
      3. USB za\u0159\u00edzen\u00ed odpoj\u00edme z po\u010d\u00edta\u010de, v terminalu by se m\u011bl zobrazit v\u00fdpis podobn\u00fd tomuto:
        \n(...)<\/code>
        \nUDEV [18888.225725] remove \/devices\/pci0000:00\/0000:00:14.0\/usb1\/1-2 (usb)<\/code>
        \nACTION=remove<\/code>
        \nDEVPATH=\/devices\/pci0000:00\/0000:00:14.0\/usb1\/1-2<\/code>
        \nSUBSYSTEM=usb<\/code>
        \nDEVNAME=\/dev\/bus\/usb\/001\/038<\/code>
        \nDEVTYPE=usb_device<\/code>
        \nPRODUCT=950\/6535\/110<\/strong><\/code>
        \nTYPE=0\/0\/0<\/code>
        \nBUSNUM=001<\/code>
        \n(...)<\/code><\/li>\n
      4. V textov\u00e9m editoru vytvo\u0159\u00edme pravidlo pro za\u0159\u00edzen\u00ed (jako root):
        \n$ sudo vim \/etc\/udev\/rules.d\/85-my_killswitch_rule.rules<\/code><\/li>\n
      5. Do souboru vlo\u017e\u00edme n\u00e1sleduj\u00edc\u00ed \u0159\u00e1dek:
        \nACTION==\"remove\", ENV{PRODUCT}==\"950\/6535\/110<\/strong>\", RUN+=\"\/root\/killswitch.sh\"<\/code>(obsah prom\u011bnn\u00e9 ENV{PRODUCT}<\/code> zkop\u00edrujeme z v\u00fdpisu p\u0159\u00edkazu udevadm monitor --property<\/code>)<\/em><\/li>\n
      6. Aktualizujeme pravidla (root):$ sudo udevadm control --reload-rules<\/code><\/li>\n
      7. Jako root vytvo\u0159\u00edme v textov\u00e9m editoru skript \/root\/killswitch.sh<\/code> s t\u00edmto obsahem:
        \n#!\/bin\/sh
        \nt=$(date);
        \necho $t > \/root\/test <\/code>
        \n#shutdown now<\/code>
        \n(pozor, skript bude se spou\u0161t\u011bt pod u\u017eivatelem root<\/strong>! Pokud by se n\u011bkdo dostal k tomuto skriptu, mohl by ho upravit a z\u00edskat administr\u00e1torsk\u00e1 pr\u00e1va. Proto mus\u00ed b\u00fdt pro “b\u011b\u017en\u00e9ho” u\u017eivatele nedostupn\u00fd pro z\u00e1pis.)<\/code><\/li>\n
      8. P\u0159id\u00e1me atribut pro\u00a0 spu\u0161t\u011bn\u00ed
        \n# chmod +x \/root\/killswitch.sh<\/code><\/li>\n
      9. Otestujeme.<\/li>\n
      10. Ve skriptu odkomentujeme posledn\u00ed \u0159adek (vymaz\u00e1n\u00edm #).<\/li>\n
      11. P\u0159ipraveno k ostr\u00e9mu testu.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

        Ob\u010das se m\u016f\u017ee hodit mo\u017enost rychle vypnout po\u010d\u00edta\u010d. Zde jsou dva p\u0159\u00edklady, jak to ud\u011blat.<\/p>\n","protected":false},"author":1,"featured_media":1533,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"categories":[1,65,18],"tags":[66,20,67],"class_list":["post-1531","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-linux","category-nastroje","tag-killswitch","tag-linux","tag-skript"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["cs","en"],"languages":{"cs":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false}}},"yoast_head":"\nKillswitch pro Linux - DIGITAL SELF-DEFENSE<\/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:\/\/www.digitalnisebeobrana.cz\/killswitch-pro-linux\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Killswitch pro Linux - 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