Lab 03 ‐ Linux - rune-seregina/sys-255-fa24 GitHub Wiki

Objective
In this lab, I configured a RockyOS account on my network. After this, I practiced remote connections via SSH/PuTTY and gained familiarity with Linux commands.

Vocab:

  • wheel: Linux/Unix term for a privileged/admin account
  • SSH: enables secure logins to remote machines

Resources used:

IP Assignments:

  • WAN IP (synonymous with fw interface 1/em0): 10.0.17.112/24
  • LAN IP (synonymous with fw interface 2/em1): 10.0.5.2/24
  • wks01-rune IP: 10.0.5.100/24
  • wks01/ads01/dhcp01 default gateway: 10.0.5.2/24
  • dns: 10.0.5.5/24
  • ad01-rune ip: 10.0.5.5/24
  • dhcp01-rune ip: 10.0.5.3
  • dhcp01-rune gateway:

Using nmtui

  • "nmtui"
  • select interface
  • IPv4 configuration > Manual > Show > Add > enter IP address as x.x.x.x/xx
  • Add gateway address
  • Add DNS server(s)/domains
  • OK > Back > Set system hostname > OK

Linux commands

  • new account: useradd [user]
    • passwd [user]
  • add user to wheel: usermod -aG wheel [user]
  • sudo -i: sudo for extended time (exit to undo)
  • pwd: present working directory
  • cd: change directory
    • cd ..: parent directory (relative to current location in directory)
    • cd ~: cd home directory
  • ls: list files in current directory
    • ls -la: include hidden files
  • mkdir: make directory
  • rmdir : remove directory
  • yum: pqackage management
    • yum install [package]: install package
  • groups: show user's assigned groups
  • history: show command history
  • cat: display file contents
  • mv: rename files
  • rm: delete files
  • uname: display OS system info
  • locate: locate files
  • man: display a manual for commands/utilities available in the terminal
  • grep: find specific string in specified output(s)

Troubleshooting

  • SSH on PowerShell did not work :( did some Googling, ultimately decided to download PuTTY and that worked great

Reflection
I had basic familiarity with Linux before this lab, so I only learned a couple new commands during this lab but it was good practice to re-familiarize myself with Linux. Same goes for remote connection using SSH. Overall I did not encounter significant issues during the lab and it was a good recap and lead-into setting up DHCP.

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