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Commands tagged PowerShell from sorted by
Terminal - Commands tagged PowerShell - 2 results
cygstart --hide -wa runas powershell -WindowStyle Hidden -Command '"&{wevtutil el | foreach{wevtutil cl $_}}"'
2015-02-15 22:56:20
User: lowjax
2

Efficiently clear all Windows Event log entries from within a Cygwin terminal. Uses "cygstart" to launch a hidden "PowerShell" session passing a Powershell command to loop through and clear all Windows Event Log entries. Very useful for troubleshooting and debugging. The command should in theory elevate you session if needed.

One liner is based on the PowerShell command:

wevtutil el | foreach { wevtutil cl $_ }
ls -r | ?{-not $_.psiscontainer} | group extension | select name, count, @{n='average'; e={($_.group | measure -a length).average}} | ft -a @{n='Extension'; e={$_.name}}, count, @{n='Average Size (KB)'; e={$_.average/1kb}; f='{0:N2}'}
2012-03-13 17:58:10
User: brianpeiris
Functions: ls
Tags: PowerShell
0

Here's an annotated version of the command, using full-names instead of aliases. It is exactly equivalent to the short-hand version.

# Recursively list all the files in the current directory.

Get-ChildItem -Recurse |

# Filter out the sub-directories themselves.

Where-Object { return -not $_.PsIsContainer; } |

# Group the resulting files by their extensions.

Group-Object Extension |

# Pluck the Name and Count properties of each group and define

# a custom expression that calculates the average of the sizes

# of the files in that group.

# The back-tick is a line-continuation character.

Select-Object `

Name,

Count,

@{

Name = 'Average';

Expression = {

# Average the Length (sizes) of the files in the current group.

return ($_.Group | Measure-Object -Average Length).Average;

}

} |

# Format the results in a tabular view, automatically adjusted to

# widths of the values in the columns.

Format-Table -AutoSize `

@{

# Rename the Name property to something more sensible.

Name = 'Extension';

Expression = { return $_.Name; }

},

Count,

@{

# Format the Average property to display KB instead of bytes

# and use a formatting string to show it rounded to two decimals.

Name = 'Average Size (KB)';

# The "1KB" is a built-in constant which is equal to 1024.

Expression = { return $_.Average / 1KB };

FormatString = '{0:N2}'

}