A Linux Administrator Recently Changed the IP Addresses of All

question 137

Multiple Choice

A Linux administrator recently changed the IP addresses of all the web servers from 10.10.50.x to 10.10.100.x. The administrator needs to update the serverlist.txt file to reflect the change. The file contains the following: 10:WebSvr01:10.10.50.21:Main 11:WebSvr02:10.10.50.22:Acconting 12:WebSvr03:10.10.50.23:Intranet 20:NFS01:10.10.20.21:FileServer 30:SMTP01:10.10.30.31:Email Which of the following commands will change the IP addresses and update the files in place?

• A) sed 's|.50|.100|g' serverlist.txt
• B) sed -g 's|.50|.100|a' serverlist.txt
• C) sed -i 's|.50|.100|' serverlist.txt
• D) sed -i 's|.50|.100|g' serverlist.txt

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Definitions:

Financial Break-even

The point at which a company's total revenues are exactly equal to its total expenses, resulting in neither profit nor loss.

Variable Costs

Charges that adjust in line with changes in production volume or output quantity.

Required Return

A rephrasing of Required Rate of Return; it's the expected return that investors demand for an investment in a particular asset, based on its risk.

Cash Break-even

The point at which a business generates enough cash flow to cover its operating expenses and capital costs.