{"id":219,"date":"2011-12-04T02:12:28","date_gmt":"2011-12-04T00:12:28","guid":{"rendered":"https:\/\/www.npcglib.org\/~stathis\/blog\/?p=219"},"modified":"2012-07-09T01:56:42","modified_gmt":"2012-07-08T23:56:42","slug":"entering-and-exiting-a-chroot-jail-properly","status":"publish","type":"post","link":"https:\/\/www.npcglib.org\/~stathis\/blog\/2011\/12\/04\/entering-and-exiting-a-chroot-jail-properly\/","title":{"rendered":"linux task: Entering and exiting a chroot jail properly"},"content":{"rendered":"<p>Here is a bash script I wrote to enter and exit a chrooted environment on my Gentoo.<\/p>\n<pre>\r\n#!\/bin\/bash\r\n\r\n# define here the chroot jail path\r\nCHROOT=\/home\/chroot-jail\r\n\r\nstart() {\r\n\r\n   echo \"Mounting chroot dirs\"\r\n\r\n   # This allows DNS lookups via your system's networking\r\n   cp -L \/etc\/resolv.conf ${CHROOT}\/etc\/\r\n\r\n   mount -o bind \/proc ${CHROOT}\/proc\r\n   mount -o bind \/proc\/bus\/usb ${CHROOT}\/proc\/bus\/usb\r\n\r\n   mount -o bind \/dev ${CHROOT}\/dev\r\n   mount -o bind \/dev\/pts ${CHROOT}\/dev\/pts\r\n   mount -o bind \/dev\/shm ${CHROOT}\/dev\/shm\r\n\r\n   mount -o bind \/sys ${CHROOT}\/sys\r\n\r\n   chroot ${CHROOT} \/bin\/bash\r\n\r\n}\r\n\r\nstop() {\r\n\r\n   echo \"Unmounting chroot dirs\"\r\n\r\n   umount -f ${CHROOT}\/proc\/bus\/usb >\/dev\/null\r\n   umount -f ${CHROOT}\/proc >\/dev\/null &\r\n\r\n   umount -f ${CHROOT}\/dev\/pts >\/dev\/null\r\n   umount -f ${CHROOT}\/dev\/shm >\/dev\/null\r\n   umount -f ${CHROOT}\/dev >\/dev\/null &\r\n\r\n   umount -f ${CHROOT}\/sys >\/dev\/null &\r\n\r\n}\r\n\r\nusage() {\r\n   echo \"$0 [start|stop]\"\r\n}\r\n\r\nif [ \"$1\" == \"start\" ]\r\nthen\r\n   start\r\nelif [ \"$1\" == \"stop\" ]\r\nthen\r\n   stop\r\nelse\r\n   usage\r\nfi\r\n<\/pre>\n<p>\nYou can find more information on setting up a chroot at the:<\/p>\n<ul>\n<li><a href=\"http:\/\/www.gentoo.org\/proj\/en\/base\/x86\/chroot.xml\" title=\"Gentoo x86 Chroot Setup Guide\" target=\"_blank\">Gentoo x86 Chroot Setup Guide<\/a><\/li>\n<li><a href=\"http:\/\/www.gentoo.org\/proj\/en\/base\/amd64\/howtos\/index.xml?part=1&#038;chap=2\" title=\"32Bit Chroot Guide for Gentoo\/AMD64\" target=\"_blank\">32Bit Chroot Guide for Gentoo\/AMD64<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Here is a bash script I wrote to enter and exit a chrooted environment on my Gentoo. #!\/bin\/bash # define here the chroot jail path CHROOT=\/home\/chroot-jail start() { echo &#8220;Mounting chroot dirs&#8221; # This allows DNS lookups via your system&#8217;s networking cp -L \/etc\/resolv.conf ${CHROOT}\/etc\/ mount -o bind \/proc ${CHROOT}\/proc mount -o bind \/proc\/bus\/usb ${CHROOT}\/proc\/bus\/usb [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[6],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - 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