The "Linux command" test

1. Expression

#!/bin/bash#if test expression 1 "expression is true"ifTest 1 = = 1And then Echo ' test condition is true ' fi#if test expression 1 "equals" if [expression 1]if[1 = = 1];then echo ' [] condition is true ' fi#if test! expression 1 "expression is false"ifTest! 2 = = 1And then Echo ' test condition is false ' fi#if test expression 1-a expression 2ifTest 1 = = 1-a 2 = = 2and then echo ' expression 1 and expression 2 are true ' fi#if test expression 1-o expression 2ifTest 1 = = 1-o 2 = = 3and then echo ' expression 1 or expression 2 has a true ' fi

2. File (clip)

# /bin/bash  for inch ' ls '  Do if - F $fileName  $fileName$fileName$fileName  ' is directory ' Fidone 

The "Linux command" test