Linux

As of 2016-02-11, the following issues are critical known bugs about overlayfs in Linux kernel. (overlayfs) moving a file to a directory that exists only in `upper` and deleting it creates unnecessary whiteout file https://bugzilla.kernel.org/show_bug.cgi?id=109611 solution #1: “ovl: ignore lower entries when checking purity of non-directory entries” solution #2-1: “ovl: Do not leave whiteout during … [Read more…]

If a multipath-tcp-capable guest VM cannot communicate to the Internet, try to check the firewall on the host, # iptables -L FORWARD target prot opt source destination REJECT all — anywhere anywhere reject-with icmp-host-prohibited You need to allow packets with multipath TCP (TCP option 30). # iptables -D FORWARD -p all -j REJECT –reject-with icmp-host-prohibited … [Read more…]

It has been multiple weeks since I started running Fedora Linux on a new laptop, Dell XPS 15 9530. General hardware specification of the laptop is introduced on http://www.dell.com/us/business/p/xps-15-9530/pd?oc=&model_id=xps-15-9530&l=en&s=bsd. I wanted to install Fedora 22, removing the pre-installed Windows 10. After installing the distro, several issues popped up. * Wireless interface didn’t work. Chipset is … [Read more…]

Last a month a blog post was published on a lengthy investigation on mysterious data corruption. Recently author of the article has updated with a core reason: a bug in MD-RAID 0/10/linear in Linux kernel. The author did made a contact with Samsung electronics, as he originally thought that its a firmware issue of Samsung … [Read more…]

I’ve written up a simple client for Seafile, based on FUSE-client under Linux. See https://github.com/dongsupark/seafile-fuse-client for details. To install it, do like the following: 1. Prequisites a. Install python-seafile. Python-seafile is needed as seafile-fuse-client depends on python API provided by seafile: $ git clone https://github.com/dongsupark/python-seafile.git $ cd python-seafile $ python setup.py install b. Install required … [Read more…]