Environment Question:
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Which command is used to debug a shell script program:
a) set
b) set -x
c) debug
d) db

b) set -x

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Which variable contains current shell process id: a) $* b) $? c) $$ d) $!	For every successful login, which script will be executed? a) /etc/inittab b) /etc/profile c) /etc/login d) /etc/init