unix cron job tutorial

You've been doing Windows development before, and Linux is required in recent projects. As a small rookie, hurriedly bought a classic book "Bird Brother's Linux private dishes" study. Recently there was a small task- because the product generated a lot of log, and grew fast, so you need to use the script (Bash scripts) to delete the expired log file .Using cron job under Linux can be a good solution to this

A timed task (cron job) is used to schedule commands that need to be executed periodically. With it, you can configure certain commands or scripts to run periodically over a set period of time. Cron is one of the most useful tools in Linux or Unix-like systems. The Cron Serv

Blog Category: Linux Linuxcrontabpermissionetc/profile Environment variablesOne, we often encounter the execution of a command under the shell can be successful, such as executing a Java program:Java-jar/home/opscoder/topo-audit.jar, but execution fails under crontab.cornjob is 0 * * * Java-jar/home/opscoder/topo-audit.jar: 10 points per day to execute the main method in this jarSecond, to find the reason for the failure, that is, to see the execution log of Crotab, there are 3 ways

Large chains have a big problem. Every day, thousands of trades occur in each store. Company executives want to dig into the data. Which products sell well? What's bad? Where do organic products sell well? How about the sale of ice cream? To capture this data, the organization must load all transactional data into a single data model that is more appropriate for generating the reporting type required by the company. However, this takes time, and as the chain grows, it can take more than a day to

filter: statistics and formattingUNIX Linux University tutorial-Chapter 1 (1) learning notes filter: selection, sorting, combination, and transformationUNIX Linux University tutorial-Chapter 2 (2) and Chapter 2 Learning note filter: selection, sorting, combination, and transformation of Regular ExpressionsUNIX Linux University tutorial-Chapter 2 Study NotesUN