Docker Error :
debconf: (Can't locate Term/ReadLine.pm in @INC (you may need to install the Term::ReadLine module)
debconf: delaying package configuration, since apt-utils is not installed.
Solution :
Run commands in the ubuntu container where you are getting the error
apt install apt-utils
echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
Docker service is not starting because of following error.
Starting Docker Application Container Engine...
level=info msg="[graphdriver] using prior storage driver \"aufs\""
level=info msg="Graph migration to content-addressability took 0.00 seconds"
level=info msg="Firewalld running: false"
level=fatal msg="Error starting daemon: Error initializing network controller: could not delete the default bridge network: network bridge has active endpoints"
docker.service: Main process exited, code=exited, status=1/FAILURE
Failed to start Docker Application Container Engine.
docker.service: Unit entered failed state.
docker.service: Failed with result 'exit-code'.
Solution :
Remove /var/lib/docker/network folder.
I moved the folder to home dir and restarted docker as I thought if something is broken, I can replace it again to its original place but nothing was broken, I did not need the folder again and the error was gone. I could restart docker successfully.
Why git reflogs are important, check here. If not opened, paste this url manually.
https://linuxamination.blogspot.com/2021/04/git-reflog-and-its-importance.html
CI / CD was implemented to save the time of everyone in the team who pulls the code on development, staging and production server.
It makes the 'git pull' process automated. Gitlab CI / CD and Jenkins are used by DevOps to achieve this. If you have used Jenkins, you must have created pipelines or jobs to update the code frequently on the server.
Jenkins has its own security policies and if you see carefully, you will find Jenkins asks your git password but it does not show password in plain text, the places where password is visible, either it is in hash or it is with stars like '******@123'.
But if you use third party applications like Jenkins or a Shell Script to pull the code using git on the server, anyone who has access of your server's project directory can read your git password in plain text.
You should try this yourself. cd into your project directory on the server and run command `git reflog`
If reflogs are enabled, you can see the pulled commits with password in the plain text.
If your all code is tested properly on QA server and you do not need this utility on production server, you can simply turn off saving reflogs by setting the following option in the remote git repository.
[core]
logAllRefUpdates = 0You can remove your git reflogs using following command.
This command will remove all the relogs older than 15 days.
git reflog expire --expire=15.days.ago --expire-unreachable=now --allYou can change the day number to 1 and it will delete all the reflogs of yesterday and older.
