bash 脚本 - 找不到“docker run -it my_image bash”命令

Question

we have a list of docker images, and we are trying to see what version of node/java/mongo.. is installed inside every image, using the following bash script:

#!/bin/bash
version=""
file='images.txt'
while read line; do
        sudo docker pull $line 
        sudo docker run $line bash
        version=$(node -v)
        exit
        $version >> "version.txt"
        sudo docker image rm $line
done < $file

but we have an error on the "docker run" line which says "command not found" the docker pull comannd works fine we have also noticed that the while loop continues without waiting for the first docker pull to finish and when we do the "docker run" command without the script it works fine and gets into the shell of the image.

we would appreciate any suggestions :)

Answer 1

I'm guessing you probably mean

#!/bin/bash
while read -r line; do
        sudo docker pull "$line" 
        sudo docker run -it --rm "$line" node -v
done <images.txt >version.txt

... but code which doesn't do what you want to do is a terrible way to tell us what you actually want to do. This will run node -v inside each container, where the -it option is crucial for getting output on standard output, and --rm takes care of what (I'm guessing) you were doing with a separate rm . This still obviously depends on what exactly is in the input file.