diff --git a/include/shell.h b/include/shell.h
index 8e99bea..38effcc 100644
--- a/include/shell.h
+++ b/include/shell.h
@@ -15,9 +15,9 @@ typedef struct {
   int occupied;            // 开放寻址必须有的“已占用”标记
 } ShellCmdEntry;
 
-static char currentUser[USERNAME_MAX];
-static int cmdCount;
-static ShellCmdEntry cmdBucket[CMDSIZE_MAX];
+extern char currentUser[USERNAME_MAX];
+extern int cmdCount;
+extern ShellCmdEntry cmdBucket[CMDSIZE_MAX];
 
 int shellInit(char *username);
 int shellLoop();
diff --git a/src/shell.c b/src/shell.c
index 824a973..4dabcdb 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -4,7 +4,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
+char currentUser[USERNAME_MAX];
+int cmdCount;
+ShellCmdEntry cmdBucket[CMDSIZE_MAX];
 /* 初始化shell，注册命令，传入登录的用户名 */
 int shellInit(char *username) {
   cmdCount = 0;