Conditional Judgment of shell scripts

Scripting: Stacking of commands

The first line of any script:

#!/bin/bash: The Interpreter path

In addition to the previous # number as a comment

Execute permission before script execution: chmod +x file name

Condition Judgment in bash:

Condition Test Type:

Integer test

Character test

File test

Conditional test expression:

[Expression]

[[Expression]]

Test expression

Integer comparison:

-EQ: Tests whether two integers are equal: For example, $a-eq $b, return 0 as equals

-ne: Test for two integers: unequal to true, equal to False

-GT: Test whether a number is greater than one number: greater than true, not quite false

-LT: Test whether a number is less than one number: less than true, not small for false

-ge: greater than or equal to

-le: Less than or equal to

if judgment condition; then

Statemtent1

.

.

Fi

Conditional Judgment of shell scripts