Add exec
Fix conflicts
Fix error
Update namespace.md
Update ubuntu.md
場景->情境
Merge branch 'develop' of https://github.com/kcyeu/docker_practice into kcyeu-develop
Fix conflicts
Conflicts:
	image/README.md
	image/internal.md
Merge branch 'kcyeu-develop'
Fix conflicts
Merge pull request #29 from pcedison/master

場景->情境
中英夾雜時，英數以空白間隔；更新 docker 主站台 URL
站點 -> 站台; 統一採用半形冒號