Commands tagged PowerShell (9)

  • 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 $_ }

    cygstart --hide -wa runas powershell -WindowStyle Hidden -Command '"&{wevtutil el | foreach{wevtutil cl $_}}"'
    lowjax · 2015-02-15 22:56:20 0
  • This command takes an application name as an argument and then it will listen to the tcp traffic and capture packets matching the process Id of the application. The output shows: local address / local port / Remote Address / Remote port / State / Owning Process ID Show Sample Output

    while(1 -eq 1 ) {Get-Process -Name *APPNAME* | Select-Object -ExpandProperty ID | ForEach-Object {Get-NetTCPConnection -OwningProcess $_} -ErrorAction SilentlyContinue }
    guillaume1306 · 2019-03-26 09:44:57 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}' } Show Sample Output

    ls -r | ?{-not $_.psiscontainer} | group extension | select name, count, @{n='average'; e={($ | measure -a length).average}} | ft -a @{n='Extension'; e={$}}, count, @{n='Average Size (KB)'; e={$_.average/1kb}; f='{0:N2}'}
    brianpeiris · 2012-03-13 17:58:10 2
  • This is a powershell command that returns the leaf part of the current svn url Show Sample Output

    Split-Path -Leaf ([xml](svn info --xml)).info.entry.url
    SuperflyJon · 2015-01-06 13:44:20 0
  • IMPORTANT: You need Windows PowerShell to run this command - in your Windows Command Prompt, type powershell Create a log file of your Motorola Surfboard SB6141 downstream signal strengths. Uses the built-in curl to request signal strength data from your SB6141 cable modem. HTML page has the signal strength numbers for the 8 downstreams. Some HTML/DOM processing parses out the 8 values from the above page. The eight extracted signal strengths are then logged to a file. A small while-loop watches the clock & repeats the process every 10 seconds. Show Sample Output

    while(1){while((date -f ss)%10-gt0){sleep -m 300} echo "$(date -u %s) $((curl|%{$_ -replace '\D+\n',''})">>modemlog.txt;sleep 1;echo .}
    omap7777 · 2015-12-24 02:12:10 0
  • IMPORTANT: You need Windows PowerShell to run this command - in your Windows Command Prompt, type powershell Uses sajb to start a PowerShell background job that pings an IP host every 10 seconds. Any changes in the host's Up/Down state is time-stamped and logged to a file. Date/time stamps are logged in two formats: Unix and human-readable. A while(1) loop repeats the test every 10 seconds by using the sleep command. See the Sample Output for more detail. I use this command to log Up/Down events of my Motorola SB6141 cable modem ( To end the logging, close the PowerShell window or use the "exit" command. Show Sample Output

    sajb {$ip="";$old=0;while(1){$up=test-connection -quiet -count 1 $ip;if($up-ne$old){$s=(date -u %s).split('.')[0]+' '+(date -f s).replace('T',' ')+' '+$ip+' '+$(if($up){'Up'}else{'Down'});echo $s|out-file -a $home\ping.txt;$old=$up}sleep 10}}
    omap7777 · 2015-12-28 20:33:08 0
  • Unblock multiple windows files using Powershell. -Recurse is optional to apply to all directories recursively.

    dir c:\mydir -Recurse | Unblock-File
    Denhams · 2016-02-12 17:02:14 0

  • 0
    & 'C:\cwRsync_5.5.0_x86_Free\bin\rsync.exe' --force --ignore-errors --no-perms --chmod=ugo=rwX --checksum --delete --backup --backup-dir="_EVAC/$(Get-Date -Format "yyyy-MM-dd-HH-mm-ss")" --whole-file -a -v "//MyServer/MyFolder" "/cygdrive/c/Backup"
    pascalv · 2020-03-06 10:17:42 1
  • Removes the annoying filehistory filename default of adding a really long UTC time and date string to every single file. Non recursive so you will have to run this per directory.

    Get-ChildItem -Recurse | Where-Object { $_.Name -match " ?\(\d\d\d\d_\d\d_\d\d \d\d_\d\d_\d\d UTC\)" } | Rename-Item -NewName { $_.Name -replace " ?\(\d\d\d\d_\d\d_\d\d \d\d_\d\d_\d\d UTC\)", ""}
    JohnnyVegas · 2020-04-17 20:20:44 3

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

open manpage and search for a string
This will open the manpage for "foobar", and display all instances of "searched_string". You can traverse through them by pressing "n"

watch the previous command
If you just executed some long command, like "ps -aefww | grep -i [m]yProcess", and if you don't want to retype it or cycle backwards in history and waste time quoting it, then you can use history substitution.

make image semi-transparent

Download a file securely via a remote SSH server
This command will download $file via server. I've used this when FTP was broken at the office and I needed to download some software packages.

Paste hardware list (hwls) in html format into directly from console and return URI.
In this Linux box i need to become root to get the complete hardware list, so either become root before or call it with sudo as i did, your choice.

ssh autocomplete based on ~/.ssh/config
I sue this in my .bashrc file This will also do auto-completion for scp and sftp

fuman, an alternative to the 'man' command that shows examples
Example: fuman sed

Convert tab separate file (TSV) to JSON with jq
With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 i-088dd69e5c3624888 i-0e70eac180537d4aa will produce the showed output.

history autocompletion with arrow keys
This will enable the possibility to navigate in the history of the command you type with the arrow keys, example "na" and the arrow will give all command starting by na in the history.You can add these lines to your .bashrc (without &&) to use that in your default terminal.

Clear terminal Screen
Probably the quickest / easiest way to clear the screen.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.


Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: