{"id":7205,"date":"2013-02-09T17:13:26","date_gmt":"2013-02-09T22:13:26","guid":{"rendered":"http:\/\/jianmingli.com\/wp\/?p=7205"},"modified":"2016-12-16T08:42:17","modified_gmt":"2016-12-16T13:42:17","slug":"configure-rhel-5-networking","status":"publish","type":"post","link":"https:\/\/jianmingli.com\/wp\/?p=7205","title":{"rendered":"Configure RHEL 5 Networking"},"content":{"rendered":"
\n

Contents<\/h2>\n
    \n\t
  1. \n\t\tConfigure RHEL 5 Networking<\/a>\n\t\t
      \n\t\t\t
    1. \n\t\t\t\tChange Host Name<\/a>\n\t\t\t<\/li>\n\t\t\t
    2. \n\t\t\t\tSetup Network Card: eth0<\/a>\n\t\t\t<\/li>\n\t\t\t
    3. \n\t\t\t\tSetup Networking<\/a>\n\t\t\t<\/li>\n\t\t\t
    4. \n\t\t\t\tSetup DNS<\/a>\n\t\t\t<\/li>\n\t\t\t
    5. \n\t\t\t\tSetup \/etc\/nsswitch.conf<\/a>\n\t\t\t<\/li>\n\t\t\t
    6. \n\t\t\t\tSetup \/etc\/hosts<\/em> File<\/a>\n\t\t\t<\/li>\n\t\t\t
    7. \n\t\t\t\tRestart Networking<\/a>\n\t\t\t<\/li>\n\t\t<\/ol>\n\t
    8. \n\t\tIssues<\/a>\n\t\t
        \n\t\t\t
      1. \n\t\t\t\tnetwork restart: device eth0 seems not to be present<\/a>\n\t\t\t<\/li>\n<\/ol>\n<\/ol>\n<\/ol>\n<\/div>\n
         <\/div>\n

        Configure RHEL 5 Networking<\/h2><\/span>\n

        Change Host Name<\/h3><\/span>\n
        \r\necho layer7 > \/proc\/sys\/kernel\/hostname\r\n<\/pre>\n
        * See Redhat Linux Change Host Name<\/a><\/p>\n
        Setup Network Card: eth0<\/h3><\/span>\n
        \r\nvi \/etc\/sysconfig\/network-scripts\/ifcfg-eth0\r\n<\/pre>\n
        \r\n# VMware VMXNET3 Ethernet Controller\r\nDEVICE=eth0\r\nBOOTPROTO=static # static IP address\r\nONBOOT=yes\r\nHWADDR=00:0a:20:56:14:0b\r\nIPADDR=192.168.1.61\r\nNETMASK=255.255.255.0\r\nPEERDNS=no  # This prevents \/etc\/resolv.conf from getting overwritten by \/sbin\/dhclient-script\r\n<\/pre>\n
        Setup Networking<\/h3><\/span>\n
        \r\nvi \/etc\/sysconfig\/network\r\n<\/pre>\n
        \r\nNETWORKING=yes\r\nHOSTNAME=layer7.mytest.local\r\nGATEWAY=192.168.1.1\r\nNETWORKING_IPV6=no\r\n<\/pre>\n
        Setup DNS<\/h3><\/span>\n
        \r\nvi \/etc\/resolv.conf\r\n<\/pre>\n
        \r\nsearch mytest.local\r\nnameserver 192.168.1.21\r\n<\/pre>\n
        Setup \/etc\/nsswitch.conf<\/h3><\/span>\n
        \r\nvi \/etc\/nsswitch.conf\r\n<\/pre>\n
        \r\nhosts: files dns\r\n<\/pre>\n
        Setup \/etc\/hosts<\/em> File<\/h3><\/span>\n
        * If nameserver is not setup, then we need to setup hosts file.
        \n* If you have in \/etc\/nsswitch.conf<\/em> file “hosts: files<\/strong> dns”, then \/etc\/hosts<\/em> configuration overrides dns configuration.<\/p>\n
        \r\nvi \/etc\/hosts\r\n<\/pre>\n
        \r\n192.168.1.61    layer7\r\n<\/pre>\n
        Restart Networking<\/h3><\/span>\n
        \r\n\/etc\/init.d\/network restart\r\n<\/pre>\n
        Issues<\/h2><\/span>\n
        network restart: device eth0 seems not to be present<\/h3><\/span>\n
        * Issue: When you clone or import a CentOS 6 virtual machine, for example by importing OVF template, you’ll notice that:
        \n– eth0 is missing when you issue ifconfig <\/em>command
        \n– When you try to restart networking with network restart<\/em> command, you get “device eth0 seems not to be present<\/em>” error message
        \n* Reason:
        \n– CentOS 6 caches the original network card address in \/etc\/udev\/rules.d\/70-persistent-net.rules<\/em> file
        \n– When Centos first starts, it sees the conflicts and renames eth0 to eth1
        \n* To fix, remove the cache file and reboot<\/p>\n
        \r\nrm \/etc\/udev\/rules.d\/70-persistent-net.rules\r\nreboot\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
        Configure RHEL 5 Networking Change Host Name echo layer7 > \/proc\/sys\/kernel\/hostname * See Redhat Linux Change Host Name Setup Network Card: eth0 vi \/etc\/sysconfig\/network-scripts\/ifcfg-eth0 # VMware VMXNET3 Ethernet Controller DEVICE=eth0 BOOTPROTO=static # static IP address ONBOOT=yes HWADDR=00:0a:20:56:14:0b IPADDR=192.168.1.61 NETMASK=255.255.255.0 PEERDNS=no … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[301],"tags":[344,343],"class_list":["post-7205","post","type-post","status-publish","format-standard","hentry","category-redhat","tag-networking","tag-rhel"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8cRUO-1Sd","_links":{"self":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/7205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7205"}],"version-history":[{"count":15,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/7205\/revisions"}],"predecessor-version":[{"id":11835,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/7205\/revisions\/11835"}],"wp:attachment":[{"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jianmingli.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}