1

Is there a way to know which files have changed in a docker container compared to its base image?

I am looking both for file creation/modification/deletion, but also for metadata change like file permissions.

1

The docker container diff command shows the differences between a container and its base system.

In the output, files are reported as (A) if the file or directory was added, (D) if a file or directory was deleted or (C) if a file or directory was changed. File permission changes are reported as (C).

she$ CID=$(sudo docker run --rm -d ubuntu sleep 500)
sh$ sudo docker exec $CID touch newfile
sh$ sudo docker exec $CID useradd bob
sh$ sudo docker exec $CID chmod o-x /usr/bin/cut
sh$ sudo docker diff $CID
C /etc
C /etc/group
A /etc/group-
C /etc/gshadow
A /etc/gshadow-
C /etc/passwd
A /etc/passwd-
C /etc/shadow
A /etc/shadow-
C /etc/subgid
A /etc/subgid-
C /etc/subuid
A /etc/subuid-
A /newfile
C /usr
C /usr/bin
C /usr/bin/cut
C /var
C /var/log
C /var/log/faillog
C /var/log/lastlog
C /var/log/tallylog

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.