asterisk channel information

channel information will be truncated by core show channels command
use concise option to retrieve full channel information
core  show channels concise

add user defined variable for agi
Set: variable=xxxx

name resolving issue under vpn connection

relate to dns search order.

http://support.microsoft.com/kb/311218

Const HKLM = &H80000002
sComputer = "."
Set oReg = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" _
& sComputer & "\root\default:StdRegProv") 

sKeyPath = "SYSTEM\CurrentControlSet\Services\Tcpip\Linkage"
sValueName = "Bind"

oReg.GetMultiStringValue HKLM, sKeyPath, sValueName, arValues
arValuesNew = Array()

'patch registry
If UCase(arValues(0)) <> UCase("\device\ndiswanip") Then
ReDim Preserve arValuesNew(0)
arValuesNew(0) = "\Device\NdisWanIp"
For Each objarValues in arValues
If UCase(objarValues) <> UCase("\device\ndiswanip") Then
ReDim Preserve arValuesNew(UBound(arValuesNew)+1)
arValuesNew(UBound(arValuesNew)) = objarValues
End If
Next
End If
If UBound(arValuesNew) <> -1 Then
oReg.SetMultiStringValue HKLM, sKeyPath, sValueName, arValuesNew
End If

grant power control authority to users

GPO registry control
HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\CONTROLS FOLDER\POWERCFG
HKLM\SYSTEM\CURRENTCONTROLSET\CONTROL\SESSION MANAGER\POWER

nfsv4

exports option "fsid=0"
https://wiki.archlinux.org/index.php/NFSv4

亦即此share為nfsv4的root
所有其他nfsv4的share必須依賴於此mount point之下
注意:/etc/idmapd.conf設定

run shell command and then display the result on web through asp.net via vb.net

       Dim psi As System.Diagnostics.ProcessStartInfo = New System.Diagnostics.ProcessStartInfo

        psi.FileName = "ipconfig.exe"
        psi.Arguments = " /all"
        psi.UseShellExecute = False
        psi.RedirectStandardInput = True
        psi.RedirectStandardOutput = True

        Dim ps As System.Diagnostics.Process = New System.Diagnostics.Process
        ps.StartInfo = psi
        ps.Start()
        Dim sr As StreamReader = ps.StandardOutput
        Dim aa As String
        While (Not sr.EndOfStream)
            aa = sr.ReadLine
            Response.Write(aa)
            Response.Write("
")
        End While
       ps.Dispose()

specify specific rsync binary

I have 64bits rsync 2.6.9 installed in my environment. When remote site triggers file transfer through rsync to my 32 bits platform, system will complain about rsync binary execution error. The reason is the search order in my environment setup. System looks for rsync binary from /usr/local/bin/ first and then /usr/bin/. In order to get this resolve, you have to specify the rsync path when running rsync command.

session stalled when transfer files between two sites with unstable internet connection

net.core.rmem_default = 524288


net.core.rmem_max = 524288

net.core.wmem_default = 524288

net.core.wmem_max = 524288

net.ipv4.tcp_wmem = 4096 87380 524288

net.ipv4.tcp_rmem = 4096 87380 524288

net.ipv4.tcp_mem = 524288 524288 524288

net.ipv4.tcp_rfc1337 = 1

net.ipv4.ip_no_pmtu_disc = 0

net.ipv4.tcp_sack = 1

net.ipv4.tcp_fack = 1

net.ipv4.tcp_window_scaling = 1

net.ipv4.tcp_timestamps = 1

net.ipv4.tcp_ecn = 0

net.ipv4.route.flush = 1

ref: http://ubuntuforums.org/showthread.php?t=891695