[Linux] C Shell (csh) resize2fs用法: Resize a filesystem on a partition

Overview

The resize2fs command is used in Linux to resize ext2, ext3, or ext4 file systems. It allows users to increase or decrease the size of a file system on a partition, making it a crucial tool for managing disk space effectively.

Usage

The basic syntax of the resize2fs command is as follows:

resize2fs [options] [arguments]

Common Options

• -f: Force the resize operation, even if the filesystem is mounted.
• -p: Print progress information while resizing.
• -s: Resize the filesystem to the size specified by the partition size.
• -M: Reduce the size of the filesystem to the minimum size possible.

Common Examples

1. Resize a filesystem to a specific size: To resize a filesystem to 20GB, you can use:

   resize2fs /dev/sda1 20G
   

2. Increase the size of a filesystem: If you want to increase the filesystem to fill the available space on the partition:

   resize2fs /dev/sda1
   

3. Force a resize operation: To force a resize operation on a mounted filesystem:

   resize2fs -f /dev/sda1
   

4. Print progress during resizing: To see the progress while resizing:

   resize2fs -p /dev/sda1
   

Tips

• Always ensure that you have a backup of your data before resizing a filesystem, as there is a risk of data loss.
• It is generally safer to resize a filesystem when it is unmounted. If you must resize a mounted filesystem, use the -f option with caution.
• Check the filesystem for errors using e2fsck before resizing to avoid complications.