深入理解Linuxstat命令，了解文件状态与权限变化（linuxstatd）

the ‘stat’ command is a built-in utility in the linux operating system that allows users to get information about files or directories in a variety of ways – both in terms of their inode information (such AS owner and group ids, permissions and sizes) as well as their data-content (like when they were last modified). The main purpose of this powerful command is to give users a wealth of information about their files and how they’re being utilized, so they can get a better understanding of the present status of their files.

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The ‘stat’ command itself is a very powerful and often used tool that allows system administrators to take a deeper look into the properties, permissions and status of files or directories on their system. This includes a variety of different aspects, such as file size, last access time, device details, inode numbers, and even the amount of disk space being utilized. All of this information can be used to accurately determine the state of a file, as well as to observe any changes that have been made over a certain period of time.

For example, if we wanted to get information about a certain file, we’d type the ‘stat’ command followed by the specific file or folder we’d like to learn about. Upon running the command, we’d be immediately presented with data that could tell us whether the file or directory exists, who owns it and when it was last modified. We could also view information related to deadlines, comment lines, and additional identifiers that might help us to more accurately determine the current state of the file.

To further demonstrate, let’s take a look at a sample of the output that the ‘stat’ command could provide.

$ stat myfile.txt 
  File: ‘myfile.txt’
  Size: 1033             Blocks: 8          IO Block: 4  Regular File  
 Device: 802h/2050d      Inode: 15991      Links: 1
 Access: (0764/-rwxrw-r-.)  Uid: ( 1000/ user1)   Gid: ( 1000/ user1) 
 Access: 2018-07-04 01:11:09.000000000 -0400
 Modify: 2018-07-04 01:11:09.000000000 -0400
 Change: 2018-07-04 01:11:09.000000000 -0400

The above output clearly shows information related to the file’s last access, modification and change times, as well as providing details on the permissions associated with it, as well as the user who owns the file. We can also observe the size, blocks, device details and inode number all of which help an administrator decide on how exactly to handle this particular file.

In conclusion, ‘stat’ command is an incredibly powerful tool for Linux systems, as it provides users with a simple way to get an in-depth look into their file systems. This allows them to view information related to path names, file types, permissions, and user ownership, and makes it easier to understand how the system is being used, and how to effectively manage it.

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