Programmer Help

Chapter 15 planning tasks (crontab) 15.2 what is a planned task Remind regularly or when the conditions are met. 15.1.1 types of Linux planned tasks: at, cron Routine: matters to be done at regular intervals; Unexpected: not after this time Types of planned tasks: At: can handle commands that ...

Usually when using samba, reliability and performance-based requirements require deployment into clusters, so record and organize The environment is ubuntu1604, installed offline. For ease of operation, it is recommended to configure local source and user sudo password-free Installing lvs for dispatching specific samb ...

A few days ago, there were occasional requests for a two-second timeout on the monitor display line.It took a lot of time and some detours to solve this problem.Take notes here. Pre-phase Analyses First of all, we need to know about our services: Our service is a stateless set of front-end servers plus a stateful back-end storage layer. ...

Powerful tool for network traffic analysis - visualization Network - netflow [1] - Basic Principles Network traffic analysis tool - visualization Network - netflow [2] - Introduction and configuration of Cisco NetFlow working principle Network traffic analysis tool - visualization Network - netflow [3] - differences between version 5 and ver ...

Reference resources: Details of crontab command Mail usage (use mail to view the execution of scheduled tasks) centos system forbids normal users to use crontab command Regular user-defined crontab scheduled tasks: For example, oracle user defines a timing task: print the current directory every minute [oracle@node2 ~]$ crontab ...

Explain: Based on the author's usage in peacetime and some other reference materials, the following 50 basic Linux commands that must be mastered are carefully sorted out. Command: 1. ssh Log on to remote host $ ssh -l jsmith remotehost.example.com Debugging ssh client $ ssh -v -l jsmith remotehost.example.com Show ssh client version $ ssh ...

I. Job (1) Job overview A Job is responsible for processing a short, one-time task, that is, a one-time task, which guarantees the successful completion of one or more pod s of a batch task. Kubernetes supports the following jobs: Nonparallel Job: usually create a Pod until its successful completion; Job with fixed end times: add the comple ...

We use Python nmap to implement an efficient port scanning tool, which can help us find the abnormally open high-risk ports in time by combining crontab and email alarm. Of course, the tool can also be used as the availability detection of business service port, for example, scanning whether the Web service port 80s of 192.168. ...

Recently updated the module of creating push API interface, so if you want to do a function of regularly pushing wechat applet template messages, you only need three simple steps! 1. Add application First, enter the vPush developer management console: https://dev.vpush.cloud Then click Add application and add according ...

There are two kinds of OS products: Solaris and Linux. When troubleshooting, students on site are often required to grab the bag. In order to grab the package conveniently, a grab script is made with shell. The main functions are as follows: 1. Automatically identify the OS type, and use the corresponding packet grabbing comm ...