Version Control on Don Figuerres

Setting up multiple SSH keys in a single machine

Mon, 05 May 2025 22:00:00 +0800

This is helpful in order to authenticate using SSH keys in a single machine for multiple accounts.

For example, you want to setup SSH keys in GitHub to authenticate for you work account and another SSH key to authenticate for your personal account.

Step 1: Generate SSH keys

ssh-keygen -t ed25519 -C "<your_email@example.com> <your organization name> <service>"

# Example
ssh-keygen -t ed25519 -C "myaccount@gmail.com MyOrg GitHub"

When asked for the file path of the key, make sure to add more context to the file name. I usually use encryption_service_org.

Global gitignore File

Fri, 01 Jul 2022 23:15:00 +0800

When working with a version control system, you normally have files that are not ignored in some projects but you would like to ignore in globally in your workstation environment. The ways to do that are listed below.

Option 1: The git/ignore file in the home directory

The user’s ignore file is mentioned briefly in the Git documentation. You can add here your ignore rules the same way as you do it with your project .gitignore rules.

Git Connection Errors During Cloning

Fri, 14 Jan 2022 17:18:36 +0800

I got these errors recently when I was trying to clone one of our repos. Unstable network connection or network infrastructure may have caused this so as a workaround, you can clone the repo “bit-by-bit”.

$ git clone ssh://git@your.host.com/yourrepo.git
Cloning into 'projectdir'...
 ...
remote: Enumerating objects: 26639, done.
remote: Counting objects: 100% (269/269), done.
remote: Compressing objects: 100% (152/152), done.
client_loop: send disconnect: Connection reset by peer6 MiB/s
fetch-pack: unexpected disconnect while reading sideband packet
fatal: fetch-pack: invalid index-pack output

$ git clone ssh://git@your.host.com/yourrepo.git
Cloning into 'projectdir'...
 ...
remote: Enumerating objects: 26639, done.
remote: Counting objects: 100% (269/269), done.
remote: Compressing objects: 100% (152/152), done.
client_loop: send disconnect: Connection reset by peer9 MiB/s
fatal: early EOF
fatal: fetch-pack: invalid index-pack outputing sideband packet

Workaround

The workaround is to checkout the repo bit-by-bit.

Changing Committer, Author, and Email in Git

Tue, 10 Aug 2021 00:12:25 +0800

I recently observed in my GitHub profile that most of my commits are not shown in my contribution activity. After doing a quick search, I found that the problem because my email in my commits do not match the email associated with my GitHub account.

Changing Commits in the Remote Repository

You need to use the filter-branch command to change the emails and names.

git filter-branch -f --env-filter '
 GIT_AUTHOR_NAME="yourname";
 GIT_AUTHOR_EMAIL="youremaill@host.com"
 GIT_COMMITTER_NAME="yourname";
 GIT_COMMITTER_EMAIL="youremail@host.com"
' HEAD

The command above changes the email and name for all of the commits. If you’re working on a shared repository, you need to use an if statement to change only your commits.