[Shell]crontab Run task calls Shell script, relative path cannot be found

The scene of the problem is probably

1 Cron calls a Python script

2 python script calls a shell script (for log parsing) to get the shell output and then send the message

Similar to a monitoring task.

There is no problem running the Python script directly, but after writing it in Cron. The relative path in the shell script cannot be found, always prompting that some files cannot be found

The problem was solved by using the absolute path of the log file, and the execution was normal.

Google a few, found that very many people have encountered similar problems, may be related to the cron mechanism.

Most people's problems are caused by environmental variables. Because Cron is a standalone process, it is not a user login, and so on. So some programs will not run successfully.

Similar: http://stackoverflow.com/questions/2388087/how-to-get-cron-to-call-in-the-correct-paths

But from the very many people's script basically is absolute path. Perhaps I write too little, very many principles and principles are not very clear.

This article is derived from "Orangleliu notebook " ? blog, be sure to keep this source http://blog.csdn.net/orangleliu/article/details/38641417

[Shell]crontab Run task calls Shell script, relative path cannot be found