chown 命令
chown 的作用:
修改文件和文件夹的用户和用户组属性(更改所有者权限)
看下init.rc 里面 chown的部分
# change permissions for all cpusets we'll touch at runtime
chown system system /dev/cpuset
chown system system /dev/cpuset/foreground
chown system system /dev/cpuset/background
chown system system /dev/cpuset/system-background
chown system system /dev/cpuset/top-app
chown system system /dev/cpuset/restricted
chown system system /dev/cpuset/tasks
chown system system /dev/cpuset/foreground/tasks
chown system system /dev/cpuset/background/tasks
chown system system /dev/cpuset/system-background/tasks
chown system system /dev/cpuset/top-app/tasks
chown system system /dev/cpuset/restricted/tasks
就是把/dev/xx 的权限给system
更改某个文件的权限
chown user_id1 文件1
上面是把问价1的权限给user_id1