Resize-rootfs

How to resize a root_fs filesystem

Manually

1. Increasing the size of a root-filesystem:

 e2fsck -f root_fs_tutorial-0.31
 dd if=/dev/zero of=root_fs_tutorial-0.31 bs=1 count=1 seek=550M conv=notrunc
 resize2fs -p root_fs_tutorial-0.31
 e2fsck -f root_fs_tutorial-0.31

2. Downsizing a root-filesystem:
• Create a new rootfilesystem with the size you want your filesystem to have:

 dd if=/dev/zero of=newfs bs=1 count=1 seek=1200M conv=notrunc
 mkfs -t ext2 newfs    # Change the filesystem type to your needs (ext3, etc)

• Copy the old filesystem content to the new one:

 mount -o loop oldfs /mnt/old/
 mount -o loop newfs /mnt/new
 cp -a /mnt/old/* /mnt/new/
 umount /mnt/old /mnt/new

Using uml_resize

The uml_resize that comes with the VNUML package can be also use to resize root filesystems. Look at the man page to know how it works:

 man uml_resize

Currently, only allows increasing the size, not decreasing.