有的cmdlet命令可能有2-3个别名，我们可以通过下面的命令查看所有别名和指向cmdlet的别名的个数。
PS C:PS> ls alias: | Group-Object definition | sort -Descending Count
Count Name Group
----- ---- -----
6 Remove-Item {del, erase, rd, ri...}
3 Set-Location {cd, chdir, sl}
3 Get-History {ghy, h, history}
3 Get-ChildItem {dir, gci, ls}
3 Get-Content {cat, gc, type}
3 Move-Item {mi, move, mv}
3 Copy-Item {copy, cp, cpi}
2 Start-Process {saps, start}
2 Set-Variable {set, sv}
2 Write-Output {echo, write}
2 Get-Process {gps, ps}
2 Invoke-History {ihy, r}
2 New-PSDrive {mount, ndr}
2 Stop-Process {kill, spps}
2 Rename-Item {ren, rni}
2 Get-Location {gl, pwd}
2 Compare-Object {compare, diff}
2 Where-Object {?, where}
2 ForEach-Object {%, foreach}
2 Clear-Host {clear, cls}
1 Out-Host {oh}
1 New-PSSession {nsn}
1 New-Variable {nv}
1 Out-GridView {ogv}
1 Pop-Location {popd}
1 Tee-Object {tee}
1 Remove-PSBreakpoint {rbp}
1 Receive-Job {rcjb}
1 Push-Location {pushd}
1 mkdir {md}
1 Measure-Object {measure}
1 help {man}
1 Remove-PSSnapin {rsnp}
1 Out-Printer {lp}
1 New-Item {ni}
1 New-Module {nmo}
1 New-Alias {nal}
1 Move-ItemProperty {mp}
1 Wait-Job {wjb}
1 Remove-PSDrive {rdr}
1 Start-Service {sasv}
1 Set-PSBreakpoint {sbp}
1 Set-ItemProperty {sp}
1 Start-Job {sajb}
1 Set-Alias {sal}
1 Start-Sleep {sleep}
1 Set-Item {si}
1 Select-Object {select}
1 Set-Content {sc}
1 Sort-Object {sort}
1 Remove-WMIObject {rwmi}
1 Remove-Module {rmo}
1 Rename-ItemProperty {rnp}
1 Stop-Service {spsv}
1 Set-WMIInstance {swmi}
1 Remove-Job {rjb}
1 Remove-Variable {rv}
1 Resolve-Path {rvpa}
1 Stop-Job {spjb}
1 Remove-ItemProperty {rp}
1 Remove-PSSession {rsn}
1 Exit-PSSession {exsn}
1 Format-Custom {fc}
1 Enter-PSSession {etsn}
1 Export-Csv {epcsv}
1 Export-PSSession {epsn}
1 Format-List {fl}
1 Get-PSBreakpoint {gbp}
1 Get-Command {gcm}
1 Get-Alias {gal}
1 Format-Table {ft}
1 Format-Wide {fw}
1 Export-Alias {epal}
1 Clear-History {clhy}
1 Clear-Item {cli}
1 Clear-Content {clc}
1 Add-Content {ac}
1 Add-PSSnapIn {asnp}
1 Clear-ItemProperty {clp}
1 Disable-PSBreakpoint {dbp}
1 Enable-PSBreakpoint {ebp}
1 Convert-Path {cvpa}
1 Clear-Variable {clv}
1 Copy-ItemProperty {cpp}
1 Invoke-Expression {iex}
1 Invoke-Item {ii}
1 Invoke-Command {icm}
1 Get-Variable {gv}
1 Get-WmiObject {gwmi}
1 Import-Alias {ipal}
1 powershell_ise.exe {ise}
1 Invoke-WMIMethod {iwmi}
1 Import-PSSession {ipsn}
1 Import-Csv {ipcsv}
1 Import-Module {ipmo}
1 Get-Unique {gu}
1 Get-Job {gjb}
1 Get-Member {gm}
1 Get-Item {gi}
1 Get-PSCallStack {gcs}
1 Get-PSDrive {gdr}
1 Get-Module {gmo}
1 Get-PSSnapIn {gsnp}
1 Get-Service {gsv}
1 Get-PSSession {gsn}
1 Get-ItemProperty {gp}
1 Group-Object {group}
