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:

Hyperpolarizes

The process of increasing the negative charge within a neuron beyond its resting potential, making it less likely to fire an action potential.

Presynaptic Terminal

The end point of a neuron that conducts electrical signals and releases neurotransmitters to communicate with a neighboring neuron at a synapse.

Nitric Oxide (NO)

A gaseous signaling molecule involved in various physiological processes, including vasodilation and neurotransmission.

Erectile Dysfunction

A condition characterized by the inability to maintain an erection sufficient for satisfactory sexual performance.