How to show uncommitted changes in Git and some Git diffs in detail

Question

How do I show uncommitted changes in Git?

I STFW'ed, and these commands are not working:

teyan@TEYAN-THINK MINGW64 /d/nano/repos/PSTools/psservice (teyan/psservice)
$ git status
On branch teyan/psservice
Your branch is up-to-date with 'origin/teyan/psservice'.
Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        modified:   psservice.c
        modified:   psservice.vcxproj.filters


teyan@TEYAN-THINK MINGW64 /d/nano/repos/PSTools/psservice (teyan/psservice)
$ git diff

teyan@TEYAN-THINK MINGW64 /d/nano/repos/PSTools/psservice (teyan/psservice)
$ git diff master
fatal: ambiguous argument 'master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

Answer 1

How to show uncommitted changes in Git

The command you are looking for is git diff.

git diff - Show changes between commits, commit and working tree, etc

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Here are some of the options it expose which you can use

git diff (no parameters)
Print out differences between your working directory and the index.

git diff --cached:
Print out differences between the index and HEAD (current commit).

git diff HEAD:
Print out differences between your working directory and the HEAD.

git diff --name-only
Show only names of changed files.

git diff --name-status
Show only names and status of changed files.

git diff --color-words
Word by word diff instead of line by line.

Here is a sample of the output for git diff --color-words:

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