In the future, computers will be more and more portable and the networks that connect computers together will be much faster. Data will be centralized for the purposes of logical integrity. This requires that networks be made fast, reliable, and distributed. Computing in the cloud could not come at a better time than now. Our now? IPV6 is our now and everybody’s now in everyone’s world, connected by our smart phones, laptops, desktops, and servers. E-commerce is going international and fully mobile. Hardware vendors are building systems smaller and faster than ever before. Open source software distribution models are transforming the commercial software model into a collective library… an understanding of technology at the programmatic level. People are freed and empowered to relate to each other by these advances. The commercial system now has a reduced load average and can focus on other processes, like buying, selling, and advertising online using mobile phones. Collective global positioning and mobile innovations have brought knowledge to freedom on foot. Supercomputing is here and we are distributing it to the world, empowering humans to spread ideas like nectar. Modularity, flexibility, convergence, and resilience are emerging in today’s software. What do you expect? – Asher Bond
Archive
Tag: xenI got switched to a Xen VPS (debian linux) recently and discovered that some applications couldn’t write to /dev/null. It turns out that /dev/null was actually only readable and writable by root. I logged in as root and changed the permissions so that /dev/null was readable and writable by all.
chmod 666 /dev/null
This solved the problem.
I was still having trouble with some shell accounts, though, because no users could access screen (virtual terminals). The error message was that no PTYs were available. I solved this problem by giving these users access to the /dev/ptmx directory. This directory was initially only readable, writable, and executable by root, but I made it so that anyone in the admin group could read write and execute this directory.
chown root:adm /dev/ptmx
chmod 770 /dev/ptmx
If you want any user to be able to use screen, you will have to do this:
chmod 777 /dev/ptmx
