Mạnh Nguyễn

Domain Keys vs DKIM

DomainKeys is an authentication and validation technique for email.  This blog article seeks to explain more about the underlying issues of this technology than the technology itself.  However, the technology will also be explained.
Domain Keys
DomainKeys is a PGP-like protocol for validating and authenticating an email.  PGP stands for [...]

ip_conntrack: table full, dropping packet

Last week, I found myself with a server under low load, but it couldn’t make or receive network connections. When I ran dmesg, I found the following line repeating over and over:

ip_conntrack: table full, dropping packet

I’d seen this message before, but I headed over to [...]

Sau đây mình xin kể các bạn nghe một câu chuyện :”> mang tên: Người Nhật thích ăn cá tươi.

Người Nhật rất thích ăn cá tươi. Nhưng biển gần bờ đã không còn cá nữa . Để đáp ứng nhu cầu ,họ phải chuyển sang đánh bắt xa bờ . Càng xa bờ , càng [...]

Need to monitor Linux server performance? Try these built-in command and a few add-on tools. Most Linux distributions are equipped with tons of monitoring. These tools provide metrics which can be used to get information about system activities. You can use these tools to find the possible causes of a performance problem. The commands discussed [...]