Teams linux file empty

5 Ways to Empty or Delete a Large File Content in Linux

Occasionally, while dealing with files in Linux terminal, you may want to clear the content of a file without necessarily opening it using any Linux command line editors. How can this be achieved? In this article, we will go through several different ways of emptying file content with the help of some useful commands.

Caution: Before we proceed to looking at the various ways, note that because in Linux everything is a file, you must always make sure that the file(s) you are emptying are not important user or system files. Clearing the content of a critical system or configuration file could lead to a fatal application/system error or failure.

With that said, below are means of clearing file content from the command line.

Important: For the purpose of this article, we’ve used file access.log in the following examples.

1. Empty File Content by Redirecting to Null

A easiest way to empty or blank a file content using shell redirect null (non-existent object) to the file as below:

Empty Large File Using Null Redirect in Linux

2. Empty File Using ‘true’ Command Redirection

Here we will use a symbol : is a shell built-in command that is essence equivalent to the true command and it can be used as a no-op (no operation).

Another method is to redirect the output of : or true built-in command to the file like so:

Empty Large File Using Linux Commands

3. Empty File Using cat/cp/dd utilities with /dev/null

In Linux, the null device is basically utilized for discarding of unwanted output streams of a process, or else as a suitable empty file for input streams. This is normally done by redirection mechanism.

And the /dev/null device file is therefore a special file that writes-off (removes) any input sent to it or its output is same as that of an empty file.

Additionally, you can empty contents of a file by redirecting output of /dev/null to it (file) as input using cat command:

Empty File Using cat Command

Next, we will use cp command to blank a file content as shown.

Empty File Content Using cp Command

In the following command, if means the input file and of refers to the output file.

Empty File Content Using dd Command

4. Empty File Using echo Command

Here, you can use an echo command with an empty string and redirect it to the file as follows:

Empty File Using echo Command

Note: You should keep in mind that an empty string is not the same as null. A string is already an object much as it may be empty while null simply means non-existence of an object.

For this reason, when you redirect the out of the echo command above into the file, and view the file contents using the cat command, is prints an empty line (empty string).

To send a null output to the file, use the flag -n which tells echo to not output the trailing newline that leads to the empty line produced in the previous command.

Empty File Using Null Redirect

5. Empty File Using truncate Command

The truncate command helps to shrink or extend the size of a file to a defined size.

You can employ it with the -s option that specifies the file size. To empty a file content, use a size of 0 (zero) as in the next command:

Truncate File Content in Linux

That’s it for now, in this article we have covered multiple methods of clearing or emptying file content using simple command line utilities and shell redirection mechanism.

These are not probably the only available practical ways of doing this, so you can also tell us about any other methods not mentioned in this guide via the feedback section below.

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question

MS Teams: The file .pdf Upload failed — file is empty!

Cant sent files into MS Teams private Chat message! (Chat section)

Text words are sent perfectely. Android Teams — files are sent perfectly!

It is just about PDF, docs, xls and others on Linux OS from *.deb package installation. The last PDF file size was 26 kB and it was definitely not empty! Error message: The file .pdf Upload failed — file is empty!!

OS version: lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal

uname -r
5.8.0-34-generic

The part of LOG file while opening file from disk and getting the error message is attached.

9 Answers

Do you mean only PDF files cannot upload normally in Teams client?

Have you tried to create new PDF files and upload it to see if this issue can be reproduced?

Do you have the same issue when upload file in public Teams channel?

In this case, we firstly recommend you clear your client cache by the following command:

1.Cache folder on Linux

/.config/Microsoft/Microsoft\ Teams\ -\ Insiders

2.To remove cache folder
rm -r

/.config/Microsoft/Microsoft\ Teams\ -\ Insiders

If the response is helpful, please click «Accept Answer» and upvote it.

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sorry, cant find folder:

/.config/Microsoft/Microsoft\ Teams\ -\ Insiders

/.config/Microsoft/Microsoft Teams/.
should i delete everything there and below?

and yes, not only PDF files are not uploaded into chat. PPTX not uploaded as well. The same for DOCS. JPEG files are uploaded OK.

I think this is the right time for analyzing logs. Please let me know how to trace.

From Android phone files PDF, PPTX and other files are uploaded OK.

/.config/Microsoft/Microsoft Teams/.
should i delete everything there and below?

Yes, you can try to clear all folders in the Teams path and restart the client.

Hi Jimmy, i did what you suggested and it was no effect.

Teams raised the same error: «file is empty»

If you scroll down my post you may see the another person having the same error — OstrolkAdam-8411.

He said that he cannot send files (error file is empty) using downloaded .DEB package microsoft teams. Sending pictures is OK.

Thats exactly the same situation as i got.

Please let me know what we can do next for resolving this issue.

This is still the issue using Ubuntu 20.04 and Teams client. I dont have this problem using web client.

this web client?

What browser do you use to access Teams web client from Ubuntu 20.04?

I use google chrome Verze 88.0.4324.96 (Oficiální sestavení) (64bitový)
I can send files on teams.microsoft.com but I cannot send files (error file is empty) using downloaded .DEB package microsoft teams.

I have discovered that sending pictures using copy picture & paste picture works ok but cannot send anything using «Attach file» option in chat.

That’s bug for sure. I’ve got the same issue. And also tried to delete everything inside

/.config/Microsoft/Microsoft Teams/ and

/.config/teams
Here is my sys info
OS: Ubuntu 20.04.2 LTS x86_64
5.4.0-66-generic
teams 1.3.00.30857
Here is what I found in

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question

Bug report: MS Teams on Linux fails to upload files with special characters

Hello,
I’m using Microsoft Teams version 1.3.00.30857 (64 bits) on a fully updated Ubuntu 18.04.
Whenever I try to upload a file from my PC to Teams it fails if:
— the file is inside a folder with special charecters in its name, such as «Relatório»
— the filename has special charecters

Teams has the following behavior:
— if I use drad and drop the file nothing happens
— if I use the button to upload a file, it creates a file with zero bytes, but doesn’t show any error message

Renaming the file or folder to remove any special character solves the problem, but I’d like to be able to use the original names.

If I use the web version of Teams everything works as expected.

I have the same problem when i try to upload file.

I’m using Ubuntu 20.10 and Teams 1.3.00.30857

Same problem with ubuntu 20.10 on the desktop app

11 Answers

We have raised a bug to Teams Platform about sending files over teams in Linux. More of this seems to be Product Support query. Will get back to you once bug is resolved.

Same issue here!

I did the test in my environment and when upload the txt file named «Relatório», the error message will say it is empty file. However, it will upload normally when using Teams web client. To troubleshot this issue, I tried to change the language (English -> Portuguese) setting in Teams client but it didn’t work.

To make sure if it is a known issue in Teams for Linux, i will discuss with our Teams engineers. If there is any useful information or solution, we will update in time.

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How to create empty file in Linux

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I use touch file to create an empty file from the command line.

Me thinks that touch command is the easiest way to create new, empty files on Linux or Unix-like systems including macOS.
touch foo bar baz
ls foo bar baz

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