How to get bash or ssh into a running container in background mode?
Step 1: First of all, try to find your active container by running
# docker ps
or
# docker ps -a
Step 2: If the container is not running,
# docker start your_id
Step 3: If we use attach we can use only one instance of shell.
# sudo docker attach 665b4a1e17b6 #by ID
or
# sudo docker attach loving_heisenberg #by Name
If we want open new terminal with new instance of container’s shell, we just need run the following:
# sudo docker exec -i -t 2e56ad1705b1 /bin/bash #by ID
or
# sudo docker exec -i -t loving_heisenberg /bin/bash #by Name
# root@665b4a1e17b6:/#
Step 4: To exit bash without leaving bash running in a rogue process
# exit
Notes:
A reminder for boot2docker users: remove sudo
If you are using docker in Linux, you will have to use sudo along with docker commands.
You should try not to run commands as sudo, rather add your user to the docker group and just run normally.
I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.
I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.
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