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…]
After a visit to the talk about “containers and systemd” by Lennart Poettering, I just tried to set up several container setups using systemd-nspawn.
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…]
(This article is an english verison of the blog post by rainygirl, which is originally written in Korean. written by rainygirl, translated by hipporoll) On Jul. 6th, an Italian spyware company ‘Hacking Team’ (HT) was compromised, so that its internal data in size of 400 GB was entirely leaked via torrent. The leaked archive contains … [Read more…]
(…) The app was quickly adopted by Korean users as a free alternative to text messaging. Part of its success is due to the fact that KakaoTalk functions like its own version of the Internet within a smartphone: Users don’t have to close the app, ever, to check the news, talk to friends, order dinner … [Read more…]