Red Hat System Administration I

Instructions

1. Use the ssh command to log in to the servera machine as the student user.

   [student@workstation ~]$ ssh student@servera
   ...output omitted...
   [student@servera ~]$

2. View package information and list files in the rhcsa-script-1.0.0-1.noarch.rpm package. Also view the script that runs when you install or uninstall the package.

   1. View information for the rhcsa-script-1.0.0-1.noarch.rpm package.

      [student@servera ~]$ rpm -q -p rhcsa-script-1.0.0-1.noarch.rpm -i
      Name        : rhcsa-script
      Version     : 1.0.0
      Release     : 1
      Architecture: noarch
      Install Date: (not installed)
      Group       : System
      Size        : 593
      License     : GPL
      Signature   : (none)
      Source RPM  : rhcsa-script-1.0.0-1.src.rpm
      Build Date  : Wed 23 Mar 2022 08:24:21 AM EDT
      Build Host  : localhost
      Packager    : Bernardo Gargallo
      URL         : http://example.com
      Summary     : RHCSA Practice Script
      Description :
      A RHCSA practice script.
      The package changes the motd.

      Note

      The preceding package modifies the MOTD, or "Message of the Day". A system displays the MOTD to users as they log in to systems.

   2. List files in the rhcsa-script-1.0.0-1.noarch.rpm package.

      [student@servera ~]$ rpm -q -p rhcsa-script-1.0.0-1.noarch.rpm -l
      /opt/rhcsa-script/mymotd

   3. View the script that runs when you install or uninstall the rhcsa-script-1.0.0-1.noarch.rpm package.

      [student@servera ~]$ rpm -q -p rhcsa-script-1.0.0-1.noarch.rpm --scripts
      preinstall scriptlet (using /bin/sh):
      if [ "$1" == "2" ]; then
         if [ -e /etc/motd.orig ]; then
           mv -f /etc/motd.orig /etc/motd
         fi
      fi
      postinstall scriptlet (using /bin/sh):
      ...output omitted...

3. Extract the contents of the rhcsa-script-1.0.0-1.noarch.rpm package to the /home/student directory.

   1. Use the rpm2cpio and cpio -tv commands to list the files in the rhcsa-script-1.0.0-1.noarch.rpm package.

      [student@servera ~]$ rpm2cpio rhcsa-script-1.0.0-1.noarch.rpm | cpio -tv
      -rw-r--r--   1 root     root          593 Mar 23 08:24 ./opt/rhcsa-script/mymotd
      2 blocks

   2. Extract all files from the rhcsa-script-1.0.0-1.noarch.rpm package to the /home/student directory. Use the rpm2cpio and cpio -idv commands to extract the files and create the parent directories where needed in verbose mode.

      [student@servera ~]$ rpm2cpio rhcsa-script-1.0.0-1.noarch.rpm | cpio -idv
      ./opt/rhcsa-script/mymotd
      2 blocks

   3. List the files in the /home/student/opt directory to verify that the extracted files are the same as the files inside the package.

      [student@servera ~]$ ls -lR opt
      opt:
      total 0
      drwxr-xr-x. 2 student student 20 Mar 23 09:22 rhcsa-script
      
      opt/rhcsa-script:
      total 4
      -rw-r--r--. 1 student student 593 Mar 23 09:22 mymotd

4. Install the rhcsa-script-1.0.0-1.noarch.rpm package. Use the sudo command to gain superuser privileges to install the package.

   1. Use the sudo rpm -ivh command to install the rhcsa-script-1.0.0-1.noarch.rpm RPM package.

      [student@servera ~]$ sudo rpm -ivh rhcsa-script-1.0.0-1.noarch.rpm
      [sudo] password for student: student
      Verifying...                          ################################# [100%]
      Preparing...                          ################################# [100%]
      Updating / installing...
         1:rhcsa-script-1.0.0-1             ################################# [100%]
      [student@servera ~]$

   2. Use the rpm command to verify that you correctly installed the package.

      [student@servera ~]$ rpm -q rhcsa-script
      rhcsa-script-1.0.0-1.noarch

5. Exit from the servera machine and connect again to test the new message of the day.

   [student@servera ~]$ exit
   logout
   Connection to servera closed.
   [student@workstation ~]$ ssh student@servera
   ______         _   _   _       _     _____         _       _
   | ___ \       | | | | | |     | |   |_   _|       (_)     (_)
   | |_/ /___  __| | | |_| | __ _| |_    | |_ __ __ _ _ _ __  _ _ __   __ _
   |    // _ \/ _` | |  _  |/ _` | __|   | | '__/ _` | | '_ \| | '_ \ / _` |
   | |\ \  __/ (_| | | | | | (_| | |_    | | | | (_| | | | | | | | | | (_| |
   \_| \_\___|\__,_| \_| |_/\__,_|\__|   \_/_|  \__,_|_|_| |_|_|_| |_|\__, |
                                                                       __/ |
                                                                      |___/
   
   Activate the web console with: systemctl enable --now cockpit.socket
   
   Register this system with Red Hat Insights: insights-client --register
   Create an account or view all your systems at https://red.ht/insights-dashboard
   Last login: Wed Mar 23 09:21:26 2022 from 172.25.250.9
   [student@servera ~]$

6. Return to the workstation system as the student user.

   [student@servera ~]$ exit
   logout
   Connection to servera closed.
   [student@workstation ~]$