R71 IT Blog

Sometimes it’s handy to change the time interval that Linux has to check tcp connection statusses. Current setting in seconds:# cat /proc/sys/net/ipv4/tcp_keepalive_time Change to 15 minutes: # echo 900 > /proc/sys/net/ipv4/tcp_keepalive_time This is not permanent ..  and you must place in an init proc… # vi /etc/sysctl.conf net.ipv4.tcp_keepalive_time =900 The following settings I used for…

Vandaag een aardig stukje gelezen over de vooroordelen die (vooral) managers hebben over IT-ers. En dan hebben we  het over  de stereo-typering dat “IT-personeel doorgaans bestaat uit sociaal brakke nerds met een ego-probleem”. Ik heb dit soort uitspraken laatst nog uit de mond van een recent in mijn bedrijf aangenomen manager gehoord. Toen ben ik…

Command Description • apropos whatis Show commands pertinent to string. See also threadsafe • man -t man | ps2pdf – > man.pdf make a pdf of a manual page which command Show full path name of command time command See how long a command takes • time cat Start stopwatch. Ctrl-d to stop. See also…

You can run into the problem when you want to deploy a VM from a template the options are greyed out, even afterrestarting the vCenter services. PowerCLI to the rescue:   $templates = Get-Template * foreach($item in $templates){ $template = $item.Name #Convert Template back to VM Set-Template $template -ToVM -RunAsync #Convert Template back to template…

My old Nokia is replaced by a less older Nokia 6230i and it comes with a few games. I started to play Streetrace and it’s pretty addictive. So last night in stead of going to bed to get some really needed sleep I started playing and scored a new record. Good enough for me to…

[ELITIL] ELITIL2: / # uname -aHP-UX ELITIL2 B.11.23 U ia64 0686319827 unlimited-user license [ELITIL] ELITIL2: / # modelia64 hp server rx4640 To see which hardwarepath is connected to which scsi address (and to see if Unix has CLAIMED the device, that is loaded a driver for it): [ELITIL] ELITIL2: / # ioscan -fnC disk

Handy registry keys to check after doing a P2V Configuration of network connections is mostly mest up. Clean up under hte following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network To find uninstall options for software not registrated in the Microsoft software tool:HKEY_LOCAL_MACHINE\software\Microsoft\Windows\CurrentVersion\Uninstall

Starting vi     Command Description vi file start at line 1 of file vi +n file start at line n of file vi + file start at last line of file vi +/pattern file start at pattern in file vi -r file recover file after a system crash Saving files and quitting vi   Command Description :e file edit file (save current file…

To Openfiler From Another Machine (a Freenas server) In Freenas run the RSYNC service Goto Services > RSYNC > Server > Modules and create a module from the right directory Use ssh to log into your Openfiler box To query which modules are available (notice the double colon):# rsync freenas.yourdomain.com::DATA            MY DATA To rsync from…

Create a csv file, each line contains :   10.20.220.0,10.20.221.238,00409D3C40FD,09-200-0277   10.20.220.0 = scope 10.20.221.238 = ip adress 00409D3C40FD = MAC adress 09-200.0277 = hostname    Then execute the following command that uses the file to make the reservations: for /f “tokens=1-4 delims=,” %G IN (list.csv) do netsh dhcp server \\dhcp_servername scope %G add reservedip…

A couple of months ago I developped this script that pulls information out of Nortel routers and switches via snmp, and then creates a list with the following information about each connected device of which the interface (NIC) is up and running: MAC address IP address DNS name Stack Switch Portnumber Result: The output of…