best comptia a study guide

Read the 26 issue of the Wang Guide on MySQL sub-Library layered backup video, the script has generated interest, but the lack of knowledge of MySQL, some of the commands and some of the data is not very weak. But preface spent 3 hours of valuable learning time compiling a small script.Script requirements: Now there is a dir file in/tmp with

": "1","_version": 4,"Status": 200}}, {"Delete": {"_index": "Customer","_type": "External","_id": "2","_version": 3,"Status": 200,"Found": true}} ]}You can also import data from a JSON file, put the above command-D message into a. json file, you can perform the relevant operations inside.Curl-xpost ' Localhost:9200/bank/account/_bulk?pretty '--data-binary @accounts. JSONThird, searchThere are two basic ways

? function F (t) { alert (t); var T; Alert (t) } function f2 (t) { alert (t); var t =; Alert (t); } F (a); F2 (20); Check the results: F ()-->20, 20; F2 ()-->20, 30;What is the reason for this? I summed up: in the case of the name of the function parameter and the local variable, if the local variable is only declared, but there is no assignment, the local variable will not overwrite th

order to let the students understand more clearly, we need to take a few steps first.Step 1:sed related command set option parametersTable 1-1 sed command Command Function G When used in conjunction with S, represents a global match substitution for the current row (different from the next G meaning) P Print matching lines S