Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although[……]
linux tools part 5– Trace network information
March 13, 2013 linux, system No comments linux tools
linux tools part 3– Monitor process status
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[……]
linux tools part 2– network Monitoring
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[......]
linux tools part 1– Linux Kernel Performance
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[……]
[多图慎入] 云南游记
January 7, 2013 system No comments new life
最近的一些杂事
December 26, 2012 system No comments
Blog 有段时间没更新了，最近发生了很多事搞得自己身心疲惫。首先公司为这次1221大促准备了很久,后台系统,前端应用都有比较大的变动,最终也是以破亿的销售额皆大欢喜。今年的工作也算告一段落,运维得到了不少的肯定,系统由纯RAC架构变为多维化的架构,包括10月份Exadata的上线,年底MongoD[……]
闰月的威胁
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[……]