Detecting failures caused by process limits on CentOS 6

Translations: FR, FR

On Linux, resources limits are there to ensure that a single user will not saturate the server resources. These limits can cause silent failures. The best way to detect these failures is to use the auditd daemon, which can catch the result of individual system calls.

Linux and the strange case of the TCP black holes

Translations: FR, FR

On Internet, some sites might be mysteriously unreachable while the server hosting the site is alive and well. What is the cause of these mysterious black holes.