How to run multiple commands in docker at once

Question

I'm trying to execute multiple commands like this.

docker run image cd /some/path && python a.py

But I get a "No such file or directory" error.

Answer 1

In order to run multiple commands in docker, use /bin/bash -c with a semicolon ;

docker run image /bin/bash -c "cd /some/path; python a.py"

In this case the second command (python) will be executed only if the first command (cd) returns no error or an exit status. To avoid this use && instead of ; (semi-colon)

docker run image /bin/bash -c "cd /some/path && python a.py"

Answer 2

Pass the entire argument to /bin/bash:

docker run image /bin/bash -c "cd /path/to/somewhere; python a.py"

Answer 3

You can pipe commands inside Docker container

bash -c "<command_1> | <command_2>"

Answer 4

You can pipe commands inside Docker container, bash -c "<command1> | <command2>"for example:

docker run img /bin/bash -c "ls -1 | wc -l"

Answer 5

Hey @Tyrion, Replace your entrypoint with sh /www/docker-start.sh. Hope it helps

Answer 6

 The issue seems to be with the entrypoint script /docker-entrypoint.sh. The script needs to have executable permission (chmod +x).

Answer 7

Try running the following commad:

["bash", "/start_up.sh"]

Answer 8

If non of these solutions work, try adding this in your start_up.sh file to get more details about the failure.

set -x

Answer 9

Change this in your dockerfile:

CMD ["/run.sh"]
to
ENTRYPOINT ["/bin/bash", "/run.sh"]

Answer 10

Hey @Tyrion, Are you running on local machine or remote? If you mount any volume at your source directory (where script is located) it might override entire directory and thus unable to find your script.

Answer 11

Try this:

docker run image bash -c "cd /some/path && python a.py"
or /bin/sh

Comments

Thanks, it worked for me.

Answer 12

Hi,

You need to use one shell to run the command in docker. You can use bash shell as well. The below example shows how to run multiple commands using a shell in docker.

$ docker run image /bin/bash -c "date; cal"