Unix Tools - How to make script program

1. How make a script file with vi :
_Form_
_Out put only

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# # is a command >> My new script echo "Hello worl !!!!" # echo is output tool # _from : echo "......"

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_Using Variable and out value of variable

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# variable_name=value name=keovessna echo "My name is $name!!!" # $variable_name to show value of variable

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_Read value to varibale and out put value of variable

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# read variable_name echo "Your name :" read name echo "Name is $name"

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_More full command

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# a program calculate data of function degree 2 (x1,x2) # using -e for more keyword in echo ex. \n \t \a \c echo -e "Function degree 2 (x1,x2)\n" echo -e "Axˆ2 + Bx + C = 0\n" echo "A = " read A echo "B = " read B echo "C = " read C # data = b*b-4*a*c data=`expr $B \* $B - 4 \* $A \* $C` echo -e "data = $data\n"

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2.How to run script after you wrote your script, it is not set as execution permission. So you have to make it as execution permission by >>

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chmod 755 script_name _or_ chmod +x script_name

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Then you can run this script with some shell script tool such as :

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bash script_name _or_ sh script_name _or_ ./script_name

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