Common condition tests for bash in Linux commands: integer test eq, file Test-E, string test = =

Test method: Expression: expressed, expressed

[Expression]

[[Expression]]

Test expression

There are three common conditions tested in bash:

1. Integer test:

-eq equals

-lt less than

-ne Not equal to

-GT Greater than

-le less than or equal to

-ge greater than or equal to

Integer: Integers

integer1=63 integer2=77

[$INTEGER 1-eq $INTEGER 2]

[[$INTEGER 1-eq $INTEGER 2]]

Test $INTEGER 1-eq $INTEGER 2

2. File test:

-e file: Test files exist

-F File: Test files are normal files

-D File: Tests whether the specified path is a directory

-R File: Tests whether the current user has Read permission to the specified file

  - W File: Tests whether the current user has write access to the specified file

-X file: Tests whether the current user has execute permission on the specified file

[-E File] tests for the existence of file files

[[-E file]] tests for the existence of file files

Test the script for syntax errors:

Bash-n Script

Bash-x script: Stepping through a script

3. String Test:

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Common condition tests for bash in Linux commands: integer test eq, file Test-E, string test = =