関連ワード:  exit 0 in shell script    return 0 in shell script    exit 0 in bash script    exit 0 means in shell script    exit status 0 in shell script    exit 0 in unix shell script    exit code 0 in shell script    return 0 in bash script    exit 0 and 1 in shell script    exit 0 vs exit 1 in shell script