新增 "Linux-shell-set-command.md"
新增 "Linux-shell-set-command.md"

Signed-off-by: XiongHui Guo <c816ee361b8bcaf7cf19d627e3bc89a63016b2b4@msn.com>

shines77/my_docs,shines77/my_docs,shines77/my_docs,shines77/my_docs