LCE600 - CentOS 8 Linux (RHEL 8 / Oracle Linux 8) - Senior System Administrator

• LCE600 - CentOS 8 Linux (RHEL 8 / Oracle Linux 8) - Senior System Administrator
  • Contents
  • Prerequisites
    • Hardware
    • Software
    • Internet
  • Using our infrastructure
  • Training Program
  • Skills Assessment

• A computer running either MacOS, Linux, Windows™ or Solaris™,
• QWERTY US Keyboard,
• 4 GB of RAM,
• Headphones,
• A mic (optional).

• Chrome, Edge or Firefox web browser.

• A fast, direct (no proxy or VPN), Internet connection (4G minimum),
• Access to : https://itraining.network, https://ittraining.team and subdomains thereof.
• Accessible ports : 80, 443.

The Instructor will assign you an ID ranging from Trainee01 to Trainee10.

In order to access our infrastructure, you will first need to login to one of our gateways using SSH:

Ask the Instructor for the password.

Once you are connected, use the following command to connect to your VM:

ssh -l trainee 10.0.2.45

If, for any reason, you cannot login via SSH use your Internet browser to navigate to your login page:

Enter your ID and ask the Instructor for the password.

Once logged in, click on the CentOS8_SSH_10.0.2.45 link. You will be logged into the VM automatically.

The VM comes with two pre-configured accounts :

• LCE601 - Managing Integrated Peripherals
  • Special Files
  • LAB #1 - Commands
    • 1.1 - The lspci Command
    • 1.2 - The lsusb Command
    • 1.3 - The dmidecode Command
  • LAB #2 - The sysctl Command
    • 2.1 - The /proc Directory
      • Files
        • /proc/cpuinfo
        • /proc/interrupts
        • /proc/dma
        • /proc/ioports
        • /proc/devices
        • /proc/module
        • /proc/diskstats
        • /proc/partitions
        • /proc/swaps
        • /proc/loadavg
        • /proc/meminfo
        • /proc/version
      • Directories
        • ide/scsi
        • acpi
        • bus
        • net
        • sys
    • 2.2 - Using the sysctl Command
  • LAB #3 - Interpreting Information in /proc
    • 3.1 - free
    • 3.2 - uptime ou w
    • 3.3 - iostat
    • 3.4 - hdparm
    • 3.5 - vmstat
    • 3.6 - mpstat
    • 3.7 - sar
  • USB Modules
  • udev
    • The udevadm Command
  • The /sys Filesystem
  • LAB #4 - Limiting Ressources
    • 4.1 - ulimit
    • 4.2 - CGroups
      • Limiting Memeory Usage
      • The cgcreate Command
      • The cgdelete Command
      • The /etc/cgconfig.conf File
      • The cgconfigparser Command

• LCE602 - Compiling the Kernel and Managing Quotas
  • The Linux Kernel
  • LAB #1 - Modules
  • LAB #2 - Compiling and Installing a Kernel and Modules
    • 2.1 - Move /home
    • 2.2 - Preparing the Environment
    • 2.3 - Preparing the Kernel Source Tree
      • The .config file
      • The Makefile file
    • 2.4 - Configuring the Kernel
    • 2.5 - Compiling the Kernel
    • 2.6 - Installing the Kernel
  • LAB #3 - Managing Quotas
    • 3.1 - The quotacheck Command
    • 3.2 - The edquota Command
    • 3.3 - The quotaon Command
    • 3.4 - The repquota Command
    • 3.5 - The quota Command
    • 3.6 - The warnquota Command

• LCE603 - Managing the Network
  • Presentation
    • The nmcli Command
  • LAB #1 - Configuring the Network
    • 1.1 - Connections and Profils
    • 1.2 - Name Resolution
    • 1.3 - Adding a Second IP Address to a Profile
    • 1.4 - The hostname Command
    • 1.5 - The ip Command
    • 1.6 - Manually Activating and Disactivating a Device
    • 1.7 - Static Routing
      • The ip Command
      • Disactivating/Activating Internal Routing on a Server
  • LAB #2 - Diagnostics
    • 2.1 - The ping Command
    • 2.2 - The netstat Command
    • 2.3 - The traceroute Command
  • LAB #3 - SSH
    • 3.1 - Presentation
      • SSH-1
      • SSH-2
    • 3.2 - Configuring the Server
    • 3.3 - Configuring the Client
    • 3.4 - SCP
      • Presentation
      • Usage
    • 3.5 - Authentication with Asymetric Keys