C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
set-executionpolicy remotesigned



Make sure you’ve changed your execution policy. By default, PowerShell won’t run scripts at all, no matter how you specify the path.
 

To run a script, specify the entire file path, or either: 1) use the .\ notation to run a script in the current directory or 2) put the folder where the script resides in your Windows path.
 

If your file path includes blank spaces, enclose the path in double quote marks and preface the path with an ampersand.

Note. So can you use PowerShell to add a folder to your Windows Path? Sure; here’s a command (that we won’t bother to explain in this introductory article) that tacks the folder C:\Scripts onto the end of your Windows path:

$env:path = $env:path + ";c:\scripts"


$a = 4
$b = 5
$c = $a + $b

echo $c

remove-variable c - to remove variable c from scope

get-alias - to get alias commands in command prompt


get-command - gets all commands available in powershell

prefix with # on commands to comment out


get-help commandname - to get help for a particular command name


can debug powershell scripts using Editor C:\Windows\System32\WindowsPowerShell\v1.0\powershell_ise.exe

calling functions: 
 function SayHi($a)
   {
   write-host $a
   }   
   SayHi hi


function SayHi($a)
{
write-host $a
}

SayHi $args[0]

$ git clone ssh://bjohns@gerrit.********.com:29418/dhg/myharmony

$ scp -p -P 29418 bjohns@gerrit.********.com:hooks/commit-msg .git/hooks

$ git add win/Assemblies/Newtonsoft.Json.dll -f (-f pipe adds excluded files)

$ git commit -m "[PRO-187] - Chrome Browser [Mh App] In windows 8, the Mh app is not launched."

$ git status

$ git push origin HEAD:refs/for/master (Master here is the remote master)


To clone a particular branch alone:
$ git clone -b my-branch https://git@github.com/username/myproject.git
$ git clone -b 2.4 --single-branch https://github.com/Itseez/opencv.git opencv-2.4 (With Git 1.7.10 and later, add --single-branch to prevent fetching of all branches. 

Example, with OpenCV 2.4 branch)


To get the latest(warning if overwrite chances and don't care if any untracked files present)
git pull


Force overwrite local files from remote repository:
$ git fetch --all

Revert changes made to a file:
git checkout 

To move to a particular branch:
git checkout 

Undo local changes:
git checkout .


Force overwrite with delete of untracked files in GIT:
git clean -f -d

$ git reset --hard HEAD
$ git reset --hard origin/master
git pull


Find changes that happened in a file:
git diff app/cefclient/cefclient.rc


Merging of changes from One branch to Another:
You have made somme changes in "dev" branch that you want to merge to "master" branch.
And you are in master branch right now.
$ git merge dev


Undoing Staging(Remove the file from Index):
git reset => unstage all files staged.
git reset  => to unstage a particular file



Undoing a Commit:
git reset --hard HEAD~1   => nuke commit and never see it again.
git reset HEAD~1  =>  undo the commit but keep your changes for a bit of editing before you do a better commit. 
git reset --soft HEAD~1   => undo your commit but leave your files and your index. Meaning we dont need to "git add" again.


Create new Local Branch:
git checkout -b development.
Now setting upstream for the development branch:
git branch --set-upstream-to origin/development



Geting latest of a particular file:
$ git checkout origin/master 


git pull equivalent to git fetch and git merge.


Change Origin URL:
git remote set-url origin git://new.url.here


Deleting a remote branch:
git push origin --delete   # Git version 1.7.0 or newer
git push origin :          # Git versions older than 1.7.0

Deleting a local branch:
git branch --delete 
git branch -d  # Shorter version
git branch -D  # Force delete un-merged branches

Deleting a local remote-tracking branch:
git branch --delete --remotes /
git branch -dr / # Shorter
git fetch  --prune # Delete multiple obsolete tracking branches
git fetch  -p      # Shorter


Revert commit of a particular file:
If you want to revert to the commit before c5f567, append ~1 (works with any number):
git checkout c5f567~1 -- lib/util.js


Merge from one remote branch(node_cluster_support) to another remote branch(master) was not working, using BitBucket.
So i merged the changes from remote branch(node_cluster_support) to local(master branch).
>git merge --no-ff -m "Merged in node_cluster_support (pull request #40)" remote/origin/node_cluster_support
>git commit
>git push
This created a merge commit in master, where the node_cluster_support branch merged in with the master.



Reverting a pushed commit:
git revert