Useful command lists

These are a list of useful commands I use more than often. They are pretty handy to have.

Rewriting commit history for incorrect username

git filter-branch --env-filter '
if [ "$GIT_COMMITTER_EMAIL" = "harshavardhan.mitblr2022@learner.manipal.edu" ]; then 
    export GIT_COMMITTER_EMAIL="kolhatkarh@gmail.com";
    export GIT_AUTHOR_EMAIL="kolhatkarh@gmail.com";
fi' --tag-name-filter cat -- --branches --tags

Then

git push --force

Keep Docker container running until quit

tail -f /dev/null

tail is a command-line utility that prints the last few lines of a file.
With the -f (follow) option, it continuously monitors the file for new lines, printing them as they appear.
Normally used with log files, it keeps the command running, displaying new content as it’s written to the file. /dev/null (The Null Device):
A special file in Unix/Linux that discards all data written to it.
Reading from it always returns an immediate end-of-file (EOF), meaning there’s no actual data in it.

Alternative is

sleep infinity

**If the main process exits, the container stops. sleep infinity ensures the container keeps running.

Useful little git commands

Temporarily going back to an older commit

get commit hash using git log.
Go back using git checkout <commit hash>
To come back to present changes, git switch -

Stop tracking a file/folder in future commits

git rm --cached <filename> and git rm --cached -r <foldername>. The -r flag recursively stops tracking all files inside the folder.

Removing files from staging area

git reset . removes all files from staging area.