RH124 - ch12s11

From workstation run the lab net-review start command. The command runs a start script that determine if the host, serverb, is reachable on the network.

[student@workstation ~]$ lab net-review start

Use the ssh command to log in to serverb as the student user. The systems are configured to use SSH keys for authentication, so a password is not required to log in to serverb.
[student@workstation ~]$ ssh student@serverb ...output omitted... [student@serverb ~]$
Use the sudo -i command to switch to the root user. If prompted, use student as the password.
[student@serverb ~]$ sudo -i [sudo] password for student: student [root@serverb ~]#

Create a new connection with a static network connection using the settings in the table.

Parameter	Setting
Connection name	lab
Interface name	en`X` (might vary, use the interface that has `52:54:00:00:fa:0b` as its MAC address)
IP address	172.25.250.11/24
Gateway address	172.25.250.254
DNS address	172.25.250.254

Determine the interface name and the current active connection's name. The solution assumes that the interface name is enX and the connection name is Wired connection 1.

[root@serverb ~]# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enX: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:00:fa:0b brd ff:ff:ff:ff:ff:ff
[root@serverb ~]# nmcli con show --active
NAME                UUID                                  TYPE      DEVICE
Wired connection 1  03da038a-3257-4722-a478-53055cc90128  ethernet  enX

Create the new lab connection profile based on the information in the table described in the instructions. Associate the profile with your network interface name listed in the output of the previous ip link command.

[root@serverb ~]# nmcli con add con-name lab ifname enX type ethernet \
ipv4.method manual \
ipv4.address 172.25.250.11/24 ipv4.gateway 172.25.250.254
[root@serverb ~]# nmcli con mod "lab" ipv4.dns 172.25.250.254

Configure the new connection to be autostarted. Other connections should not start automatically.

[root@serverb ~]# nmcli con mod "lab" connection.autoconnect yes
[root@serverb ~]# nmcli con mod "Wired connection 1" connection.autoconnect no

Modify the new connection so that it also uses the address 10.0.1.1/24.

[root@serverb ~]# nmcli con mod "lab" +ipv4.addresses 10.0.1.1/24

Or alternately:

[root@serverb ~]# echo "IPADDR1=10.0.1.1" \
>> /etc/sysconfig/network-scripts/ifcfg-lab
[root@serverb ~]# echo "PREFIX1=24" >> /etc/sysconfig/network-scripts/ifcfg-lab

Configure the hosts file so that 10.0.1.1 can be referenced as private.
[root@serverb ~]# echo "10.0.1.1 private" >> /etc/hosts

Reboot the system.

[root@serverb ~]# systemctl reboot
Connection to serverb closed by remote host.
Connection to serverb closed.
[student@workstation ~]$

From workstation use the ping command to verify that serverb is initialized.

[student@workstation ~]$ ping -c3 serverb
PING serverb.lab.example.com (172.25.250.11) 56(84) bytes of data.
64 bytes from serverb.lab.example.com (172.25.250.11): icmp_seq=1 ttl=64 time=0.478 ms
64 bytes from serverb.lab.example.com (172.25.250.11): icmp_seq=2 ttl=64 time=0.504 ms
64 bytes from serverb.lab.example.com (172.25.250.11): icmp_seq=3 ttl=64 time=0.513 ms

--- serverb.lab.example.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 78ms
rtt min/avg/max/mdev = 0.478/0.498/0.513/0.023 ms
[student@workstation ~]$

Evaluation

On workstation, run the lab net-review grade script to confirm success on this lab.

[student@workstation ~]$ lab net-review grade

Finish

On workstation, run the lab net-review finish script to finish this lab.

[student@workstation ~]$ lab net-review finish

This concludes the lab.

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Red Hat System Administration I (RH124)

Haley_Ruccio

19 lip 2023

The first of two courses covering the core system administration tasks needed to manage Red Hat Enterprise Linux serversRed Hat System Administration I (RH124) is designed for IT professionals without previous Linux system administration experience. The course provides students with Linux administration competence by focusing on core administration tasks. This course also provides a foundation for students who plan to become full-time Linux system administrators by introducing key command-line concepts and enterprise-level tools. This course is the first of a two-course series that takes a computer professional without Linux system administration knowledge to become a fully capable Linux administrator. These concepts are further developed in the follow-on course, Red Hat System Administration II (RH134).This course is based on Red Hat® Enterprise Linux 9.0.Course content summaryIntroduce Linux and the Red Hat Enterprise Linux ecosystem.Run commands and view shell environments.Manage, organize, and secure files.Manage users, groups and user security policies.Control and monitor systemd services.Configure remote access using the web console and SSH.Configure network interfaces and settings.Manage software using DNFAudience for this courseThe primary persona is a technical professional with current or pending responsibilities as a Linux enterprise or cloud system administrator.This course is popular in Red Hat Academy, and is targeted at the student who is planning to become a technical professional using Linux.Prerequisites for this courseBasic technical user skills with computer applications on some operating systems are expected.Take our free assessment to gauge whether this offering is the best fit for your skills.Technology considerationsThere are no special technical requirements for this course.This course is not designed for bring your own device (BYOD).Internet access is not required but is recommended so that students can research and browse Red Hat online resources.

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