Under Linux $ (cd `dirname $ 0`; pwd)

 

 

 

In writing hive scripts, we often see the following ways of writing:

 

#!/bin/bash
basepath=$(cd `dirname $0`; pwd)

 

The specific meanings are as follows:

 

dirname $0, get the parent directory of the currently executing script file

cd `dirname $0`, enter this directory (switch the current working directory)

pwd, display the current working directory (after cd is executed)

 

 

Notice:

In the process of using it, please pay attention to this: 
"`" in the command is not an English single quotation mark, but the symbol under the same key of "~" in the English input method.

 

 

To put it bluntly, it is to get the absolute path of the folder where your file is currently located:

[zm@sandbox job_scheduling]$ pwd
/home/zm/test/job/job_scheduling/name.sh After executing the above command, the result is:
/home/zm/test/job/job_scheduling