Asteris video conference

[general]
videosupport=yes

[xxx]
......
allow=h263
allow=h263p

Sync เวลา โดยใช้ ntpd

ติดตั้ง ntpd
#
Redhat/Centos : yum install ntp
Debian/Ubuntu : apt-get install ntp

#
แก้ไขไฟล์ /etc/ntp.conf
โดยประเทศไทยให้ใส่

server 1.th.pool.ntp.org
server 0.asia.pool.ntp.org
server 2.asia.pool.ntp.org

#
Restart ntpd /etc/init.d/ntp restart

20 Network Tools

1: top - Process Activity Command
2: vmstat - System Activity, Hardware and System Information
3: w - Find Out Who Is Logged on And What They Are Doing
4: uptime - Tell How Long The System Has Been Running
5: ps - Displays The Processes
6: free - Memory Usage
7: iostat - Average CPU Load, Disk Activity
8: sar - Collect and Report System Activity
9: mpstat - Multiprocessor Usage
10: pmap - Process Memory Usage
11 and 12: netstat and ss - Network Statistics
13: iptraf - Real-time Network Statistics
14: tcpdump - Detailed Network Traffic Analysis
15: strace - System Calls
16: /Proc file system - Various Kernel Statistics
17: Nagios - Server And Network Monitoring
18: Cacti - Web-based Monitoring Tool
19: KDE System Guard - Real-time Systems Reporting and Graphing
20: Gnome System Monitor - Real-time Systems Reporting and Graphing

from : http://www.cyberciti.biz/tips/top-linux-monitoring-tools.html