How to execute Linux shell commands in Docker

To execute a shell command in Docker, you need to add sh -c before the command, for example:

docker run ubuntu sh -c 'cat /data/a.txt > b.txt'

Otherwise, the instruction cannot be parsed normally.

Supplement: [Docker application] Execute the specified script in docker (run springboot application under docker)

【Docker application】 Execute the specified script in docker

Here is an example of executing a spring boot application:

1. Create an image file (template) to execute the sh script

Dockfile
FROM vertigomedia/ubuntu-jdk8
RUN touch /root/app_start.sh
RUN echo "#!/bin/bash" > /root/app_start.sh
RUN echo "echo 111" >> /root/app_start.sh
RUN chmod a+x /root/app_start.sh
ENV TZ 'Asia/Shanghai'
ENV APP_FILE /root/app_start.sh
EXPOSE 8889
CMD $APP_FILE
#ENTRYPOINT ["/bin/sh", "-c", "$APP_FILE"]

2. Create a script file (script to be executed in the container)

container.sh
#!/bin/bash
echo "test xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
java -jar -Xms500m -Xmx500m -Dspring.profiles.active=test-docker-1 /root/app.jar

3. Create a startup script (here is just the startup command)

docker run -itd \
 --name test_container \
 --hostname test_container \
 --net test_net --ip 170.170.1.199 \
 --volume /root/container.sh:/root/app_start.sh \
 --volume /opt/test-1.0.0-SNAPSHOT.jar:/root/app.jar \
 --privileged=true \
 test:123 /bin/bash -c 'sh /root/app_start.sh'

The above is my personal experience. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM. If there are any mistakes or incomplete considerations, please feel free to correct me.

You may also be interested in:

The most comprehensive collection of commonly used Linux commands (with examples)
Java implements command interaction code under docker container in Linux (centos) (configuration wizard)
A complete list of commonly used Linux commands (super comprehensive)
How to save command output to a file in Linux terminal
Several useless but interesting commands in Linux (collection)

<<: Introduction to the use of MySQL source command

>>: CSS animation property usage and example code (transition/transform/animation)