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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Power User’ Category

Mac OS X – need to research this one day: How do I Check DHCP Lease info in terminal – via Ars Technica OpenForum

Posted by jpluimers on 2017/06/20

One day I need to research how to get the conversions right for this: How do I Check DHCP Lease info in terminal – Ars Technica OpenForum as I think that ipconfig getoption en0 lease_time gives me the value in a different format than date -r expects.

Also:

At T1 seconds (typically set to 0.5*lease_time) after the last successful renewal, the DHCP client attempts to renew it’s lease with the DHCP server that granted it’s current address via unicast. If unsuccessful, at T2 seconds (typically set to 0.875*lease_time) after the last renewal, the DHCP client attempts to rebind with any DHCP server via multicast.

–jeroen

Posted in Apple, bash, Development, Mac, OS X, OS X El Capitan, OS X Maverick, OSX Yosemite, Power User, Scripting, Software Development | Leave a Comment »

MikroTik SFP module compatibility table – MikroTik Wiki

Posted by jpluimers on 2017/06/19

Paraphrased from MikroTik SFP module compatibility table – MikroTik Wiki [WayBack]:

SFP+ interface compatibility settings with 1G links

For MikroTik devices with SFP+ interface that support both 10G and 1G link rate following settings are needed to be set on both linked devices for required interfaces. In order to get them working in 1G link rate.

  • auto-negotiation disabled
  • port speed 1G
  • FD

Devices which SFP+ ports support 1G links:

Devices which SFP+ interfaces can be used only for 10G links:

Some caveats leading to the above info: CCR1036-8G-2S+ SFP Problems – MikroTik RouterOS [WayBack]

–jeroen

Posted in Internet, MikroTik, Power User, Routers | Leave a Comment »

keyboard shortcut to edit cell content? | Apple Support Communities

Posted by jpluimers on 2017/06/19

When you’ve got an Excel on Windows back-ground, sometimes simple stuff is difficult. So:

option+return edits a cell’s content.

Source: keyboard shortcut to edit cell content? | Apple Support Communities

–jeroen

Posted in Apple, Keyboards and Keyboard Shortcuts, OS X, OS X El Capitan, OSX Yosemite, Power User | Leave a Comment »

URLs for Mikrotik PCC load balancing

Posted by jpluimers on 2017/06/16

PCC load balancing saved my ass; here are some link I used:

–jeroen

Posted in Development, Internet, MikroTik, Power User, RouterOS, Routers, Scripting, Software Development | Leave a Comment »

OpenSSH Escape Sequences (aka Kill Dead SSH Sessions) – The Lone Sysadmin

Posted by jpluimers on 2017/06/16

You can get the below help when pressing these keys in an OpensSSH session:

  1. Enter
  2. ~
  3. ?

So thats Enter, followed by tilde, then question mark.

Then you get this help:

Supported escape sequences:
 ~.   - terminate connection (and any multiplexed sessions)
 ~B   - send a BREAK to the remote system
 ~C   - open a command line
 ~R   - request rekey
 ~V/v - decrease/increase verbosity (LogLevel)
 ~^Z  - suspend ssh
 ~#   - list forwarded connections
 ~&   - background ssh (when waiting for connections to terminate)
 ~?   - this message
 ~~   - send the escape character by typing it twice
(Note that escapes are only recognized immediately after newline.)

The one I use most is below; it leaves my tmux session alone.

  1. Enter
  2. ~
  3. .

–jeroen

via: SSH Escape Sequences (aka Kill Dead SSH Sessions) – The Lone Sysadmin

Posted in Power User, Security | Leave a Comment »

 
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