admin

Posts By admin

• webserver

  How do I resolve the Apache warning [warn] NameVirtualHost *:80 has no VirtualHosts?

  If you encounter the Apache warning “[warn] NameVirtualHost *:80 has no VirtualHosts”, you can correct the problem by adjusting your VirtualHosts (or...

• database

  How do I determine the SGA size for my Oracle database?

  sql> SHOW SGA; or sql> SELECT name,value/1024/1024 “SGA (MB)” “FROM v$sga; You can display the total SGA size by using the SQL...

• unix

  How do I resolve the error “Must run suid root for multiuser support” on my Linux server?

  If you’re running the screen command and you get the error “Must run suid root for multiuser support.”, you can correct the...

• unix

  How do I share a ssh session with the screen command on my Linux server or desktop?

  Sharing a screen session is very helpful in troubleshooting problems and providing training. To set up a screen sharing session, you can...

• unix

  How do I tell if my Java JVM is 32-bit or 64-bit on my Linux server or desktop?

  There are a few different ways to determine if your Java JVM is 32-bit or 64-bit. 1. Use the file command. Ex....

• unix

  How do I determine what version of Java I’m running on my Linux desktop or server?

  If java is already installed on your machine, you can generally just type java -version assuming that where it’s installed is part...

• mac

  How do I start my VirtualBox VM that has the error “NS_ERROR_FAILURE (0x80004005)” on my Mac?

  If you run into the following error when attempting to start a VirtualBox VM NS_ERROR_FAILURE (0x80004005) Component: Machine Interface: IMachine {5eaa9319-62fc-4b0a-843c-0cb1940f8a91} Kernel...

• mac

  How do I transfer images from my iPod or iPhone to my Mac?

  Having lots of images and videos stored on your device takes up a lot of storage. Here are a few quick and...

• mac

  How do I find out what version of Mac OSX I’m running from the command line?

  If you enjoy CLI as much as I do, you tend to do most things that way. If you want to find...

• mac

  How do I find out the serial number of my Mac from the command line?

  If you need to find out the serial number of your Mac, you can run the following command: system_profiler | grep “Serial...