Merge pull request #453 from FaizanCod/master

Added undo and other commands in git

git.md

@@ -2,7 +2,7 @@
 title: Git
 description: Git is a version-control system for tracking changes in computer files and coordinating work on those files among multiple people
 created: 2018-07-18
-updated: 2022-10-01
+updated: 2022-10-18
 ---
 
 
@@ -39,6 +39,7 @@ git checkout [branch-name]  # switch to given branch
 git merge [branch]          # merge the specified branch’s history into the current one
 git log                     # Shows current branch's commit history
 git log -p                  # Display the full diff of each commit
+git log -p [fileName]       # Shows changes over time for a specific file
 git log --stat              # Include which files were altered and the relative number of lines altered
 
 ```
@@ -47,7 +48,9 @@ git log --stat              # Include which files were altered and the relative
 
 ```sh
 git add .                           # Add all files
+git add -p [fileName]               # Add some changes in file to the next commit
 git commit -m "commit message"      # commit 
+git commit --amend                  # Changes the last commit (Doesn't alter published commits)
 git status                          # Shows the modified files in working directory which are staged for next commit
 git reset [fileName]                # Unstages file while retaining changes in present working directory
 git stash                           # to keep uncommitted changes (both staged and unstaged) for later use
@@ -62,6 +65,7 @@ git diff --staged                   # Shows diff of what is staged but not commi
 git diff branch2...branch1          # Shows diff of what is in branch1 that is not in branch2
 git diff HEAD                       # Shows difference between working directory and last commit
 git diff --cached                   # Shows difference between staged changes and last commit
+git blame [fileName]                # Shows who changed what and when in a file
 ```
 
 ## Update
@@ -76,6 +80,16 @@ git push [remote] --force          # to forcefully upload your local repository
 git pull                           # to update the local version of a repository from a remote
 ```
 
+## Undo
+
+```sh
+git revert [commit]                # Revert to a previous commit (by producing a new commit with contrary changes)
+git reset --hard HEAD              # Discards all local changes in your working directory (DANGEROUS!)
+git reset --hard [commit]          # Resets your HEAD pointer to a previous commit and discards all changes since then (DANGEROUS!)
+git reset --keep [commit]          # Resets your HEAD pointer to a previous commit and preserves all changes as unstaged changes
+git checkout HEAD [fileName]       # Discard local changes in a specific file
+```
+
 ## Stash
 
 ```sh