Powershell/Excel: Check if a excel document contains macros

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this script can be used to check if excel contains some active code. It opens the excel file in an safe way and looks for VB content and write the full file path to the console if macros are found.
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Windows: Change application for a file extension from command line

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Windows has two command line utilities to alter the application associated with a file extension.
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ActiveDirectory: Determine the kms activation server by DNS

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to determine the KMS, the server to activate Windows installations, you can query the DNS by nslookup.
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Linux: Get the start time of a process

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to get the start time of a linux process in an human readable format use the user-defined format of ps with the lstart option.
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Linux: Send Networkpackets from a shell

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the linux kernel has the ability to send simple network packets from a shell.
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