linux系统中如何改变文件/目录的所有者和所属组

[root@centos79 test]# ls
[root@centos79 test]# mkdir test1
[root@centos79 test]# touch test1/a.txt
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 root root 19 Jul 26 10:41 test1
[root@centos79 test]# ll test1/*
-rw-r--r--. 1 root root 0 Jul 26 10:41 test1/a.txt

[root@centos79 test]# chown liujiaxin01 test1/
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 liujiaxin01 root 19 Jul 26 10:41 test1

[root@centos79 test]# chgrp liujiaxin01 test1/
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 liujiaxin01 liujiaxin01 19 Jul 26 10:41 test1
[root@centos79 test]# ll test1/*    ## 文件夹下的文件的所有者和所属组并没有改变
-rw-r--r--. 1 root root 0 Jul 26 10:41 test1/a.txt

[root@centos79 test]# ls
[root@centos79 test]# mkdir test1
[root@centos79 test]# touch test1/a.txt
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 root root 19 Jul 26 10:45 test1
[root@centos79 test]# ll test1/*
-rw-r--r--. 1 root root 0 Jul 26 10:45 test1/a.txt
[root@centos79 test]# chown liujiaxin01:liujiaxin01 test1/
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 liujiaxin01 liujiaxin01 19 Jul 26 10:45 test1
[root@centos79 test]# ll test1/*   ## 文件夹内的所有者和所属组并没有改变
-rw-r--r--. 1 root root 0 Jul 26 10:45 test1/a.txt

[root@centos79 test]# ls
[root@centos79 test]# mkdir test
[root@centos79 test]# touch test/a.txt
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 root root 19 Jul 26 10:47 test
[root@centos79 test]# ll test/*
-rw-r--r--. 1 root root 0 Jul 26 10:47 test/a.txt
[root@centos79 test]# chown -R liujiaxin01:liujiaxin01 test/
[root@centos79 test]# ll
total 0
drwxr-xr-x. 2 liujiaxin01 liujiaxin01 19 Jul 26 10:47 test
[root@centos79 test]# ll test/*
-rw-r--r--. 1 liujiaxin01 liujiaxin01 0 Jul 26 10:47 test/a.txt