{"id":9121,"date":"2021-08-09T17:06:12","date_gmt":"2021-08-09T17:06:12","guid":{"rendered":"https:\/\/linuxways.net\/?p=9121"},"modified":"2021-08-09T17:06:12","modified_gmt":"2021-08-09T17:06:12","slug":"truncate-command-in-linux","status":"publish","type":"post","link":"https:\/\/linuxways.net\/de\/centos\/truncate-command-in-linux\/","title":{"rendered":"Truncate Command in Linux"},"content":{"rendered":"

Introduction<\/h2>\n

truncate is a command used to resize the file to the size you require. It helps you to delete the content inside a file without removing that file.<\/p>\n

This command helps to truncate a file quickly and easily. The truncated file depends on the current file size; if the file size is larger than the specified size, the extra data will be lost.<\/p>\n

This article will show you how to use the truncate command in Linux as we go through below.<\/p>\n

Install Coreutils Packages<\/h2>\n

Run the apt command:<\/p>\n

$ sudo apt install coreutils<\/pre>\n
Output:<\/p>\n
<\/p>\n
Use the grep command to see the detail of packages:<\/p>\n
$ dpkg -l | grep coreutils<\/pre>\n
Output:<\/p>\n
<\/p>\n
The syntax of truncate command<\/h2>\n
$ truncate -s SIZE filename<\/pre>\n
The truncate command with examples<\/h2>\n
1. Clear the content of the file<\/strong><\/p>\n
Syntax:<\/p>\n
$ truncate -s 0 filename<\/pre>\n
We will use du command to check the disk space used:<\/p>\n
$ du -sh filename<\/pre>\n
<\/p>\n
Here the original size of skip.txt file is 4.0KB.<\/p>\n
Now we will clear the content of skip.txt file following the syntax:<\/p>\n
$ truncate -s 0 skip.txt<\/pre>\n
Then will use du command to check again:<\/p>\n
$ du -sh skip.txt<\/pre>\n
Output:<\/p>\n
<\/p>\n
Use the ls -lh command to check file size<\/p>\n
$ ls -lh skip.txt<\/pre>\n
Output:<\/p>\n
<\/p>\n
2. Truncate a file to the desired size<\/strong><\/p>\n
We will use du command to check the disk space used:<\/p>\n
$ du -sh filename<\/pre>\n
<\/p>\n
Here the original size of hello.txt file is 4.0KB.<\/p>\n
Now we will truncate the file to 400 bytes size:<\/p>\n
$ truncate -s 400 hello.txt<\/pre>\n
Use the ls -lh command to check file size:<\/p>\n
$ ls -lh hello.txt<\/pre>\n
Output:<\/p>\n
<\/p>\n
3. Increase or decrease file size<\/strong><\/p>\n
You can use the prefix “+” or “-” with -s <\/strong>option to do this.<\/p>\n
The dup.txt file is 400k:<\/p>\n
<\/p>\n
Now we will try increasing 600k bytes:<\/p>\n
$ truncate -s +600k dup.txt<\/pre>\n
Then check the file:<\/p>\n
$ ls -lh dup.txt<\/pre>\n
Output:<\/p>\n
<\/p>\n
Same as above, you can use the prefix “-” with -s <\/strong>option to decrease file size.<\/p>\n
4. Get help<\/strong><\/p>\n
$ truncate --help<\/pre>\n
Output:<\/p>\n
<\/p>\n
5. Check your version<\/strong><\/p>\n
$ truncate --version<\/pre>\n
Output:<\/p>\n
<\/p>\n
Conclusion<\/h2>\n
You\u2019ve already gone through the details of how to use the truncate command in Linux.<\/p>\n
Thanks for reading.<\/p>","protected":false},"excerpt":{"rendered":"
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