Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although[……]
March 13, 2013 linux, system No comments linux tools
Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although[……]
February 28, 2013 linux, system No comments linux tools
pidstat是一款很不错的针对linux pid状态监控的程序
The pidstat command is used for monitoring individual tasks currently being managed by the Linux kernel.
It writ[……]
February 27, 2013 linux, system No comments linux tools
本来想写一篇关于nicstat的文章,霸爷已经写的非常好了参考这里nicstat 网络流量统计利器
这里说明一下使用nicstat 可以完美替代iptraf ,nload 等工具
同样可以替代watch –命令行模式:
eg:
Every 1.0s: /sbin/ifconfi[......]
February 27, 2013 linux, system No comments linux tools
Perf is a profiler tool for Linux 2.6+ based systems that abstracts away CPU hardware differences in Linux performance measurementsand presents a simp[……]
June 26, 2012 linux No comments
来自公司SA组的一封邮件
HI All
简单来说Linux kernel低于2.6.18-164且开启NTP服务的server有自动重启的风险
目前我们大多数的server kernel如下
$ uname -a
Linux xen21-vm04 2.6.18-128.1[……]
March 20, 2012 Architect, linux, software No comments
What is virtual server?
Virtual server is a highly scalable and highly available server built on a cluster of real servers. The architecture of serve[……]
January 16, 2012 linux, system 5 comments structure
Regular Pages and HugePages
This section aims to give a general picture about memory access in virtual memory systems and how pages are referenced.[……]