Explanation
The utility that can be used to change how often a filesystem check is performed on an ext2 filesystem without losing any data stored on that filesystem is tune2fs. This command can adjust various parameters of a Linux ext2, ext3, or ext4 filesystem, such as the maximum mount count, the check interval, the reserved blocks percentage, and the default mount options. To change the check interval, the -i option can be used, followed by a time value. For example, to set the check interval to 180 days for the filesystem on /dev/sda1, the following command can be used:
sudo tune2fs -i 180d /dev/sda1
This command will modify the superblock of the filesystem, which contains the metadata and configuration information, without affecting the data stored on the filesystem. The other options are incorrect because they are not suitable for changing the check interval of an ext2 filesystem. Option A is wrong because there is no such utility as mod2fs. Option B is wrong because fsck is a utility for checking and repairing filesystems, not changing their parameters. Option D is wrong because mke2fs is a utility for creating ext2 filesystems, which will erase the existing data on the partition. Option E is wrong because there is no such utility as fixe2fs.
For more information on how to use the tune2fs command, you can refer to the following articles:
* 15 tune2fs command examples in Linux [Cheat Sheet] - GoLinuxCloud
* Linux tune2fs command With Examples - GeeksforGeeks
* tune2fs command-file system management - Linuxstar
* tune2fs Command Examples - Gianforte School of Computing
* tune2fs Command - IBM