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Not able to unserstand the difference

 
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Guys,

I'm not able to interpret the following shell command...



How does "\$USER=$USER" the same as given in line 2?
 
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Well the following things you should know about bash:
- ' is different than ", the first specify a string which is not interpreted
- $ specify an environment variable, if is in 'string' is not interpreted, if is in "string" it is
- \$ is an escape sequence, so, even is present "string", the \$ is interpreted as a string, not as a value of a variable

Hope it helps
 
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