This post is meant to be a counterpart to the previous KVM post, but about containers instead. The idea is to show how exactly containers work by running a busybox Docker image in our own small container runner.
Source: Linux containers in a few lines of code, an article by Serge Zaitsev. See also the discussion on Hacker News.
Sudo is one of the most powerful and dangerous tools in the Unix or Linux system administrator's toolbox. With it, an ordinary user can run commands just as if he or she were the superuser or any other user. Now, One Identity, the company behind the utility, has released a new version of sudo, called sudo 1.9, which gives it better auditing, logging, and security than ever before.
Source: Securing Linux's master sysadmin command: Sudo, an article by Steven J. Vaughan-Nichols.