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

Question

Quizplus · Accepted Answer

The command "sed -i 's|.50|.100|g' serverlist.txt" will replace all occurrences of ".50" with ".100" in the file serverlist.txt and update the file in place. The "-i" option is used for in-place editing, and the "g" at the end of the substitution command ensures that all occurrences on each line are replaced.

A Linux Administrator Recently Changed the IP Addresses of All