Shell Script Note one

Single Branch if statement

if judgment condition; then

Statement1

Statement1

...

Fi

Two-branch if statement:

if judgment condition; then

Statement1

....

Else

Statement2

....

Fi

Multi-Branched if statement:

If judging condition 1;then

Statement1

.....

Elif Judging Condition 2;then

Statement2

.....

Elif Judging Condition 3;then

Statement3

.....

Else

Statement4

Fi

Exercise: Write a script

Pass a parameter to the script, enter the parameter as Q, q to exit the script, otherwise the user parameters are displayed;

#!/bin/bash

#

if [$ = ' Q '];

Then

echo "Quit ..."

Exit1

elif [$ = ' Q '];

Then

echo "Quit ..."

Exit2

Else

echo $

Fi

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Shell Script Note one