Give the printout of the following sequential commands. Be sure to write “ nothi

Question

Give the printout of the following sequential commands. Be sure to write “nothing” if the only thing appearing on the screen is the next prompt. Be sure to write “blank line” if a blank line is printed. This is for Unix.

general > i=class; j=is; k=over

general > echo $i $j $k

general > sh

! general > echo $i $j $k

! general > i=Be; j=nice

! general > exit

general > echo $i $j $k

general > sh

! general > echo $i $j $k

! general > export i j

! general > i=enjoy; j=this

! general > echo $i $j $k

! general > exit

general > echo $i $j $k

general > export i j k

general > sh

! general > echo $i $j $k

! general > export i j

! general > i=enjoy; j=this

! general > sh

!! general > echo $i $j $k

!! general > exit

! general > exit

general > echo $i $j $k

Explanation / Answer

Hi,

general > i=class; j=is; k=over

this is just assignment, so nothing is printed

general > echo $i $j $k

class is over //variable values which were set using above command.

general > sh

this opens a bash or shell to execute a script, notice the !

! general > echo $i $j $k

class is over //printed again

! general > i=Be; j=nice

values of i and j are set in this shell

! general > exit

exit from shell

general > echo $i $j $k

class is over // the changes inside shell dont exist here

general > sh

//open a new shell

! general > echo $i $j $k

class is over

! general > export i j

export changes the environment variables, basically changes can stay

! general > i=enjoy; j=this

i and j values are set

! general > echo $i $j $k

enjoy this over

! general > exit

exit

general > echo $i $j $k

enjoy this over

general > export i j k

enjoy this over

general > sh

new shell session

! general > echo $i $j $k

enjoy this over

! general > export i j

export i and j

! general > i=enjoy; j=this

set i and j

! general > sh

exit

!! general > echo $i $j $k

enjoy this over

!! general > exit

exit

! general > exit

exit

general > echo $i $j $k

enjoy this over
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