Arvin's Howtos

If you are decided to install Puppet for Linux automation for your network, you may encounter an issue same as what I encountered as describe below. While installing Puppet via yum method, I ran into following dependency error: # yum install puppet-server Loaded plugins: product-id, security, subscription-manager This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package puppet-server.noarch 0:3.8.1-1.el6 will be installed --> Processing Dependency: puppet = 3.8.1-1.el6 for package: puppet-server-3.8.1-1.el6.noarch --> Running transaction check ---> Package puppet.noarch 0:3.8.1-1.el6 will be installed --> Processing Dependency: hiera >= 1.0.0 for package: puppet-3.8.1-1.el6.noarch --> Processing Dependency: facter >= 1:1.7.0 for package: puppet-3.8.1-1.el6.noarch --> Processing Dependency: ruby-a

ifconfig networking command has been deprecated in RHEL 7. Redhat suggest to use "ip" command instead of now legacy ifconfig or use a text user interface "nmtui" to control network manager. After you have set ip/gateway/dns or dhcp setting in nmtui, you can restart the network as below: # systemctl restart NetworkManager.service # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host         valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000     link/ether 52:54:00:16:ae:0e brd ff:ff:ff:ff:ff:ff     inet 10.8.8.238/24 brd 10.8.8.255 scope global dynamic eth0        valid_lft 3576sec preferred_lft 3576sec     inet6 fe80::5054:ff:fe16:ae0e/64 scope link         valid_lft f