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I used Gparted to resize a ext4 partition but it fails. This is the command:

% resize2fs -p /dev/sdb5

resize2fs 1.42.13 (17-May-2015)

resize2fs: Filesystem has unsupported read-only feature(s) while trying to open /dev/sdb5 Couldn't find valid filesystem superblock.

I've been searching about this problem and I found similar issues in CentOS and Redhat for which it is recommended to use resize4fs (ext4). However this is not available for Ubuntu 16.04.

How could I tackle this problem?

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    Partition has to be unmounted. You cannot run from your working system, but need to use live installer's gparted or download the latest gparted ISO and use it. – oldfred Feb 7 '18 at 22:54
  • Using gparted from a recent live CD is the best answer I can think of too. Can you post it as an answer? I would, but I don't want to take credit from you. – thomasrutter Feb 7 '18 at 23:05
  • There is no resize4fs. It appears that you are using a newer ext4 feature in which case, you need to use a newer release than 16.04 to resize it. – psusi Feb 8 '18 at 2:39
  • Are you root/did you use sudo ? – Robert Riedl Feb 8 '18 at 15:39
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As suggested in the comments a recent gparted live CD solved my problem. I could resize the partition without problems using a live CD of gparted v0.30.0.

However my laptop did not boot after the resizing. The grub got destroyed!! I solved this with a live CD of systemrescueCd. I restored the grub using the solution 2 from here.

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