Git reset hard Explained – Revert, Clean, tag

git reset command that is used to undo the local changes to the state of a Git repo. In a simple way to explain “reset” is the command when we want to move the repository back to a previous commit, Simply discarding any changes made after that commit.

What is git reset vs revert?

something deferent “git revert” command that used to undo changes on a public branch, and “git reset” that used reserved for undoing changes on a private branch.
You can also understand of git revert as a tool for undoing committed changes, while git reset HEAD is for undoing uncommitted changes.

Table of Content :

• What is git reset?
• Will git reset delete files?
• Git revert last commit ?
• How do I clean up a git repository?
• what is git tag ?
• How do you remove a git tag?
• What happens when you git clone?

1. What is git revert?

The “cat” is a utility command in Linux. that commonly use to print the content of a file and the cat command also allows us to write some texts into a file.
So, you will use ” cat >file name” command create a new file and write something “This is my first git file” and enter “ctrl+d” to save

# cat >resetfile

The “git add” command use adds a change in the working directory to the staging area. It’s inform to Git that you want to include updates to a particular file in the next commit.
Use “git add” command to add you code staging and showing status use “git status ” command.

# git add .
# git status

What would happen if you ran the git reset?

“git reset” is the command when we want to move the repository back to a previous commit, Simply discarding any changes made after that commit.

# git reset.
# git status

Now, you can rectify and require change something on “resetfile” file and again add that file to staging area.

2. Will git reset delete files?

# vi resetfile
# git add .

“git reset –hard” command Reset from staging area and as well as delete from the working directory to match the most recent commit.

# git reset –hard ( full delete)

3. Git revert last commit ?

Note: you just run previous step to knowing git revert example command.

# cat >revertfile
# git add .
# git commit -m “this is first revert commit”
# git log –oneline

Now, you will over write something on that same file As, showing a wrong entry

# cat >>revertfile
Over write on revert

# git add .
# git commit -m “this over write or wrong commit”
# git log

“git revert” command that used to undo changes on a public branch, You can also understand of git revert as a tool for undoing committed changes, while git reset HEAD is for undoing uncommitted changes.

# git revert < put commit Id>
Massage: Please ignore previous this commit
:wq

Use those to check the revert status.
You can see file has revert to previous state.

# ls
# cat restfiledemo
# git log –oneline

4. How do I clean up a git repository?

Use ” touch” command to Create multiple file to showing clean untrack file

# touch test1 test2 test3
# ls
# git status

Use ” git clean -n” to knowing untrack and up use file

# git clean -n

Use “git clean -f” command to remove all untrack file.

# git clean -f

5. what is git tag ?

Tags are ref’s that point to specific points in Git history. Tagging is generally used to highlight specific commit and easily identify.

# git log –oneline
# git tag -a important -m “this is very imp commit” <commit id>

Use those command to verify ” git tag” implementation.

# git tag
# git show important
# git log –oneline

6. How do you remove a git tag?

# git tag -d importtant
# git tag

7. What happens when you git clone?

# git clone <URL>

Summary

Git revert the changes that the related patches introduce, and record some new commits that record them. it’s very important command DevOps engineer to use development purpose.

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