Shell script structure and execution methods

[[email protected] ~]# mkdir shell[[email protected] ~]# cd shell/[[ email protected] shell]# vim first.sh#!/bin/bash                                 must be # #the  first test shell script.             Description # #written  by guozhen.mkdir 123                                    Create a 123ls                                           and displays the file under the LS directory echo  "this Is the first script. " 

How do you do it? Two methods

First Kind

[Email protected] shell]# Bash first.sh111 123 First.shthis is the first script.

The second Kind

[[email protected] shell]# chmod a+x first.sh plus permissions [[email protected] shell]#./first.shmkdir:cannot Create directory ' 123 ' : File exists111 123 First.shthis is the first script.

You can also use absolute paths

[Email protected] shell]#/root/shell/first.sh111 123 First.shthis is the first script.

can also be executed with SH

[Email protected] shell]# SH first.sh111 123 First.shthis is the first script.

To view the execution of a script (errors can be traced)

[[email protected] shell]# sh-x first.sh+ mkdir 123mkdir:cannot Create directory ' 123 ': File exists+ ls111 123 First.s H + echo ' This is the first script. ' This is the first script.

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Shell script structure and execution methods