How can I check basic file details from the command line?
Quick answer
In PowerShell, use Get-ChildItem -Path '.\practice.txt' | Select-Object Name, Length, Extension, CreationTime, LastWriteTime, Attributes to display common details for one file. Replace the example path with your file’s path. These are properties PowerShell makes available; an extension is part of the filename, not proof of the file’s contents. Timestamp meanings and available details can vary by filesystem or provider. [S1] [S2]
The question, the details, the next step.
I have a practice file and just want to check basic details from the command line. What should I use without opening or changing it?
If you’re using PowerShell, use Get-ChildItem to list the file and Select-Object to display the properties you want. For example:
Get-ChildItem -Path '.\practice.txt' | Select-Object Name, Length, Extension, CreationTime, LastWriteTime, Attributes
Replace practice.txt with your file’s path. PowerShell’s listing command is read-oriented, and the selected properties are for viewing details rather than changing the file. PowerShell documents properties such as length, extension, timestamps, and attributes for a file. [S1] [S2] This example is for PowerShell, not a universal command for every shell or platform.
What does each field tell me, and can I use the extension to confirm the actual file type?
Name is the filename, Length is the reported file size in bytes, and Extension is the filename suffix, such as .txt. CreationTime and LastWriteTime are timestamp properties, while Attributes gives file attributes. [S2]
The extension tells you what suffix the filename has; it does not verify the file’s contents or internal format. The command displays the extension property, rather than inspecting the contents. Timestamp meanings and availability can also vary by filesystem or provider, so don’t assume those fields have identical interpretations everywhere. [S2]
How do I check a whole folder instead of one file, and what should I expect in the output?
Use Get-ChildItem with the folder’s path:
Get-ChildItem -Path '.\Practice'
Change the path to your practice folder. The default listing includes fields such as attributes or mode, last-write time, file length, and name. The useful fields shown can depend on the item and provider. A directory and a file do not necessarily have the same useful size interpretation, so don’t read a directory’s displayed size as though it were a file’s length. [S1]
For a single file, add Select-Object and the properties you want to see, as in the first example. For a folder’s contents, the default listing may be enough.
Can you show a copyable example and a quick way to avoid mistakes when I try it?
Assuming your current PowerShell location contains a file named notes.txt, copy this:
Get-ChildItem -Path '.\notes.txt' | Select-Object Name, Length, Extension, CreationTime, LastWriteTime, Attributes
If the file is elsewhere, replace the quoted path with its location. For example, '.\Practice\notes.txt' is a relative path from the current location. If PowerShell cannot find the item, check the spelling and path. An error about the path does not tell you what the file contains.
To inspect a folder instead, use Get-ChildItem -Path '.\Practice'. These are PowerShell examples; available fields and timestamp interpretation can depend on the filesystem or provider. [S1] [S2]
A practical checklist
Confirm your terminal is PowerShell before using these examples.
Replace the sample filename or folder path with the practice item’s actual path.
Use
Get-ChildItemwith a file path for one file or a folder path to list its contents.Read
Lengthas the reported file size andExtensionas part of the filename, not proof of file contents.Treat available fields and timestamps as dependent on the filesystem or provider.
A few more useful answers
Does `Get-ChildItem` show the size of a folder?
It can list filesystem items, but a directory and a file do not necessarily have the same useful size interpretation. Don’t read a folder’s displayed size as though it were a file’s length. [S1]
Can the extension tell me exactly what kind of file it is?
No. The extension is a property of the filename; this command displays it but does not inspect or verify the file’s contents.
Can these commands tell me exactly when a file was created on every system?
They can display a CreationTime property when available, but timestamp availability and meaning are not established as identical across every filesystem or provider. [S2]
Sources
References used for this guide.
- [S1] PowerShell Get-ChildItem: listing names, sizes, timestamps, and attributes learn.microsoft.com · Checked
- [S2] PowerShell FileInfo properties for inspecting file details learn.microsoft.com · Checked