How do I clear a pipe in Linux?

How do I clear a pipe in Linux?

There are two easy solutions to your problem.

1. Always write messages less than PIPE_BUF bytes long, and do this in a single call to write . This will ensure that writes to the pipe are atomic.
2. Use a separate pipe for each child process. On the server side, either use threads or use nonblocking IO with select or poll .

How do I nullify a log file in Linux?

Empty log file using truncate command The safest method to empty a log file in Linux is by using the truncate command. Truncate command is used to shrink or extend the size of each FILE to the specified size.

How do I empty a file in Ubuntu?

Permanently delete a file

1. Select the item you want to delete.
2. Press and hold the Shift key, then press the Delete key on your keyboard.
3. Because you cannot undo this, you will be asked to confirm that you want to delete the file or folder.

How do I truncate a file?

The easiest and most used method to truncate files is to use the > shell redirection operator….Shell Redirection

1. The : colon means true and produces no output.
2. The redirection operator > redirect the output of the preceding command to the given file.
3. filename , the file you want to truncate.

What’s the best way to empty a file?

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:

How to empty a file in command line?

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: 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.

How to empty a large file in Linux?

5 Ways to Empty or Delete a Large File Content in Linux. 1 1. Empty File Content by Redirecting to Null. 2 2. Empty File Using ‘true’ Command Redirection. 3 3. Empty File Using cat/cp/dd utilities with /dev/null. 4 4. Empty File Using echo Command. 5 5. Empty File Using truncate Command.

Is there a way to empty a log file?

There are several ways you can empty a file without actually deleting the file. Let me show you some of these methods. The safest way to truncate a log file is using the truncate command. In the above command, -s is used to set/adjust the size (in bytes) of the file.