获取最常用的 PowerShell Cmdlet 别名
我们可以对 Get-Alias 的结果进行分组和排序，看看常用的别名有哪些。
gal | group Definition | sort Count -Descending
执行结果：
Count Name Group
----- ---- -----
6 Remove-Item {del, erase, rd, ri...}
3 Move-Item {mi, move, mv}
3 Invoke-WebRequest {curl, iwr, wget}
3 Copy-Item {copy, cp, cpi}
3 Get-ChildItem {dir, gci, ls}
3 Set-Location {cd, chdir, sl}
3 Get-Content {cat, gc, type}
3 Get-History {ghy, h, history}
2 Start-Process {saps, start}
2 ForEach-Object { %, foreach}
2 Get-Location {gl, pwd}
2 Invoke-History {ihy, r}
2 Rename-Item {ren, rni}
2 Get-Process {gps, ps}
2 Write-Output {echo, write}
2 Set-Variable {set, sv}
2 Clear-Host {clear, cls}
2 Stop-Process {kill, spps}
2 New-PSDrive {mount, ndr}
2 Compare-Object {compare, diff}
2 Where-Object {?, where}
1 Receive-Job {rcjb}
1 Receive-PSSession {rcsn}
1 Measure-Object {measure}
1 Remove-PSBreakpoint {rbp}
1 Remove-PSDrive {rdr}
1 mkdir {md}
...
还可以用如下命令查看只有 1 个字母的别名（肯定最常用了）：
gal | where { $_.Name.Length -eq 1 }
CommandType Name ModuleName
----------- ---- ----------
Alias % -> ForEach-Object
Alias ? -> Where-Object
Alias h -> Get-History
Alias r -> Invoke-History
