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Docker container exit codes: 125, 126, 127, 137, 139, 143
Docker exit codes explained: 125 is a docker run error, 126 and 127 are command problems, 137 is SIGKILL or out of memory, 143 SIGTERM and 139 a segfault.
All Docker codes & tables
Dockerfile CMD vs ENTRYPOINT: differences and when to use each
ENTRYPOINT sets the executable a container always runs; CMD sets default arguments that docker run can replace. How they combine, and exec form vs shell form.
All Docker x vs y
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