If your aim was to clear log files and make some free space, you should learn about cleaning journald logs. I hope this quick tip helped you to clear a file in Linux. Do bookmark us for more Linux quick tips. Please enter at least 3 characters 0 results found. Abhishek Prakash. In this tutorial, you'll learn various ways to truncate a log file and delete its content without deleting the file itself. Table of Contents. Method 1: Truncate a file using truncate command The safest way to truncate a log file is using the truncate command.
This quick tutorial shows you two ways to clear systemd journal logs from your Linux system. Linux Handbook Abhishek Prakash. Send login link. Check your inbox and click the link. 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.
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:.
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. TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web. Millions of people visit TecMint! If you like what you are reading, please consider buying us a coffee or 2 as a token of appreciation. We are thankful for your never ending support.
There should be a way but we have to do a little research about this before we can give you a solution. Ho to do this? You would need to do this via a cron job. You would write a script, save it somewhere, and then trigger it via cron. The script would need to handle the logic of parsing the file into lines, parse the date from each line, and then discard the lines that have a date more than 30 days old.
Are the other methods working the same way? But there are other methods works same way as show in this article, I think you should give a try and see.. When I opened this link I was expecting ways to actually get rid of the file contents on the disk. All of these methods only unlink the disk space from the file, leaving the contents on the drive.
There are other methods for completely removing file content on the disk such as shred command plus a few others. We will create a how-to guide on this topic soon.
It is not part of the prompt. Now that's new. Is it bash-specific? I don't think so. Any shell which allows redirection of output stream to a file should support this.
This will truncate the file if it already exists. Wow now I think this is called cheating the system — banarun. Using vim editor you can also create an empty file.
Sergiy Kolodyazhnyy Well, in this case not any text editor but vim. This is not from the command line. Perhaps if you post a vim one-liner. Sergiy Kolodyazhnyy Sergiy Kolodyazhnyy The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked 1. Related Hot Network Questions. Question feed.
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