linux效能監控利器20個

http://www.cyberciti.biz/tips/top-linux-monitoring-tools.html
9個免費的linux系統映象軟體，監控伺服器
http://www.linuxlinks.com/article/20090709183715280/SystemMonitoring.html


top,vmstat（軟硬體資訊）,w(使用者資訊),uptime(負載資訊),ps,free,iostat,sar,mpstat,pmap（某程式的具體記憶體使用）,netstat,ss(檢視本地埠與遠端主機埠連線),iptraf(實時的網路卡監控),tcpdump(詳細的網路傳輸資料包分析),strace,proc file(系統自帶的/proc/cpuinfo meminfo zoneinfo mounts),Nagios,cacti,kde,gnome

A few more tools:

[color=red]nmap [/color]- scan your server for open ports.
[color=red]lsof [/color]- list open files, network connections and much more.
ntop web based tool - ntop is the best tool to see network usage in a way similar to what top command does for processes i.e. it is network traffic monitoring software. You can see network status, protocol wise distribution of traffic for UDP, TCP, DNS, HTTP and other protocols.
[color=red]Conky [/color]- Another good monitoring tool for the X Window System. It is highly configurable and is able to monitor many system variables including the status of the CPU, memory, swap space, disk storage, temperatures, processes, network interfaces, battery power, system messages, e-mail inboxes etc.
[color=red]GKrellM [/color]- It can be used to monitor the status of CPUs, main memory, hard disks, network interfaces, local and remote mailboxes, and many other things.
[color=red]vnstat [/color]- vnStat is a console-based network traffic monitor. It keeps a log of hourly, daily and monthly network traffic for the selected interface(s).
[color=red]htop [/color]- htop is an enhanced version of top, the interactive process viewer, which can display the list of processes in a tree form.
[color=red]mtr [/color]- mtr combines the functionality of the traceroute and ping programs in a single network diagnostic t

全部掌握即可快速定位伺服器系統效能瓶頸