System & Process Management
PowerShell provides powerful tools for monitoring system performance, inspecting running processes, sorting output, and filtering results — all from within the Ubuntu terminal. This section demonstrates how to retrieve system information, sort CPU usage, and search for specific processes.
Step 1 — List Running Processes (ps / Get-Process
Step 2 — Retrieve System Disk Details (df -h / Get-PSDrive
Step 3 — List Running Processes Get-Process
Step 4 — Sorting Processes
By piping Get-Process into Sort-Object, you can sort active processes by CPU time or memory usage. This example sorts by CPU descending to reveal the most resource-intensive processes.
You can combine Sort-Object with Select-Object -First N
to display only the top processes.
This is an excellent lightweight alternative to running top or htop.
Step 5 — Searching for errors in syslog
Step 6 — echo, Write-Output, and Write-Host
Step 7 — Running the manual documentation for the pwsh command
Step 8 — Running the Get-Help cmdlet for instructions
Running the Get-Help cmdlet is pretty much the on-demand technical manual
It is used to display information about PowerShell concepts and commands, including cmdlets, functions, aliases, and scripts.
PowerShell is a "discovery-based" shell, the Get-Help cmdlet is designed so you don't have to memorize every command; you only need to know how to ask the system for instructions.
Step 9 — Review Active and Inactive systemd Services
This command lists all systemd service units on the system, showing whether each service is loaded, active, inactive, or no longer present.
Step 10 — Filter for Running systemd Services
Step 11 — Confirm OpenSSH Service Is Running
Step 12 — Restart the SSH Service
