7，sed 精確查詢時間段日誌

阿新 • • 發佈：2020-12-18

sed 過濾時間段日誌：
	sed -n '/日誌開始時間/,/日誌結束時間/p'  yum.log

注意：這個開始時間，和結束時間必須在日誌中能夠精確記錄找到的。
如果寫的是模糊的時間，sed 就會擷取開始時間到源日誌末尾，的所有日誌。

例如：
(PRD)[root@centos7 log]#cat yum.log 
May 18 04:07:39 Installed: 1:perl-parent-0.225-244.el7.noarch
May 18 04:07:39 Installed: perl-HTTP-Tiny-0.033-3.el7.noarch
May 18 04:07:39 Installed: perl-podlators-2.5.1-3.el7.noarch
May 18 04:07:39 Installed: perl-Pod-Perldoc-3.20-4.el7.noarch
May 18 04:07:39 Installed: 1:perl-Pod-Escapes-1.04-294.el7_6.noarch
May 18 04:07:40 Installed: perl-Encode-2.51-7.el7.x86_64
May 18 04:07:40 Installed: perl-Text-ParseWords-3.29-4.el7.noarch
May 18 04:07:40 Installed: perl-Pod-Usage-1.63-3.el7.noarch
May 18 04:07:40 Installed: 4:perl-libs-5.16.3-294.el7_6.x86_64
May 18 04:07:40 Installed: 4:perl-macros-5.16.3-294.el7_6.x86_64
May 18 04:07:40 Installed: perl-Storable-2.45-3.el7.x86_64
May 18 04:07:40 Installed: perl-Exporter-5.68-3.el7.noarch
May 18 04:07:40 Installed: perl-constant-1.27-2.el7.noarch
May 18 04:07:40 Installed: perl-Time-Local-1.2300-2.el7.noarch
May 18 04:07:40 Installed: perl-Socket-2.010-4.el7.x86_64
May 18 04:07:40 Installed: perl-Carp-1.26-244.el7.noarch
May 18 04:07:40 Installed: 4:perl-Time-HiRes-1.9725-3.el7.x86_64
May 18 04:07:40 Installed: perl-PathTools-3.40-5.el7.x86_64
May 18 04:07:40 Installed: perl-Scalar-List-Utils-1.27-248.el7.x86_64
May 18 04:07:40 Installed: 1:perl-Pod-Simple-3.28-4.el7.noarch
May 18 04:07:40 Installed: perl-File-Temp-0.23.01-3.el7.noarch
May 18 04:07:40 Installed: perl-File-Path-2.09-2.el7.noarch
May 18 04:07:40 Installed: perl-threads-shared-1.43-6.el7.x86_64
May 18 04:07:40 Installed: perl-threads-1.87-4.el7.x86_64
May 18 04:07:41 Installed: perl-Filter-1.49-3.el7.x86_64
May 18 04:07:41 Installed: perl-Getopt-Long-2.40-3.el7.noarch
May 18 04:07:43 Installed: 4:perl-5.16.3-294.el7_6.x86_64
May 18 04:07:43 Installed: 2:vim-filesystem-7.4.160-5.el7.x86_64
May 18 04:07:46 Installed: 2:vim-common-7.4.160-5.el7.x86_64
May 18 04:07:46 Installed: gpm-libs-1.20.7-5.el7.x86_64
May 18 04:07:46 Installed: 2:vim-enhanced-7.4.160-5.el7.x86_64
(PRD)[root@centos7 log]#
(PRD)[root@centos7 log]#sed -n '/04:07:39/,/04:07:42/p' yum.log #42秒這個時間在原日誌是找不到這個時間記錄的。
May 18 04:07:39 Installed: 1:perl-parent-0.225-244.el7.noarch
May 18 04:07:39 Installed: perl-HTTP-Tiny-0.033-3.el7.noarch
May 18 04:07:39 Installed: perl-podlators-2.5.1-3.el7.noarch
May 18 04:07:39 Installed: perl-Pod-Perldoc-3.20-4.el7.noarch
May 18 04:07:39 Installed: 1:perl-Pod-Escapes-1.04-294.el7_6.noarch
May 18 04:07:40 Installed: perl-Encode-2.51-7.el7.x86_64
May 18 04:07:40 Installed: perl-Text-ParseWords-3.29-4.el7.noarch
May 18 04:07:40 Installed: perl-Pod-Usage-1.63-3.el7.noarch
May 18 04:07:40 Installed: 4:perl-libs-5.16.3-294.el7_6.x86_64
May 18 04:07:40 Installed: 4:perl-macros-5.16.3-294.el7_6.x86_64
May 18 04:07:40 Installed: perl-Storable-2.45-3.el7.x86_64
May 18 04:07:40 Installed: perl-Exporter-5.68-3.el7.noarch
May 18 04:07:40 Installed: perl-constant-1.27-2.el7.noarch
May 18 04:07:40 Installed: perl-Time-Local-1.2300-2.el7.noarch
May 18 04:07:40 Installed: perl-Socket-2.010-4.el7.x86_64
May 18 04:07:40 Installed: perl-Carp-1.26-244.el7.noarch
May 18 04:07:40 Installed: 4:perl-Time-HiRes-1.9725-3.el7.x86_64
May 18 04:07:40 Installed: perl-PathTools-3.40-5.el7.x86_64
May 18 04:07:40 Installed: perl-Scalar-List-Utils-1.27-248.el7.x86_64
May 18 04:07:40 Installed: 1:perl-Pod-Simple-3.28-4.el7.noarch
May 18 04:07:40 Installed: perl-File-Temp-0.23.01-3.el7.noarch
May 18 04:07:40 Installed: perl-File-Path-2.09-2.el7.noarch
May 18 04:07:40 Installed: perl-threads-shared-1.43-6.el7.x86_64
May 18 04:07:40 Installed: perl-threads-1.87-4.el7.x86_64
May 18 04:07:41 Installed: perl-Filter-1.49-3.el7.x86_64
May 18 04:07:41 Installed: perl-Getopt-Long-2.40-3.el7.noarch
May 18 04:07:43 Installed: 4:perl-5.16.3-294.el7_6.x86_64
May 18 04:07:43 Installed: 2:vim-filesystem-7.4.160-5.el7.x86_64
May 18 04:07:46 Installed: 2:vim-common-7.4.160-5.el7.x86_64
May 18 04:07:46 Installed: gpm-libs-1.20.7-5.el7.x86_64
May 18 04:07:46 Installed: 2:vim-enhanced-7.4.160-5.el7.x86_64
(PRD)[root@centos7 log]#







匹配規則，找到結束時間的第一條日誌記錄，就立馬停止過濾。

(PRD)[root@centos7 log]#cat yum.log 
May 18 04:07:39 Installed: 1:perl-parent-0.225-244.el7.noarch
May 18 04:07:39 Installed: perl-HTTP-Tiny-0.033-3.el7.noarch
May 18 04:07:39 Installed: perl-podlators-2.5.1-3.el7.noarch
May 18 04:07:39 Installed: perl-Pod-Perldoc-3.20-4.el7.noarch
May 18 04:07:39 Installed: 1:perl-Pod-Escapes-1.04-294.el7_6.noarch
May 18 04:07:40 Installed: perl-Encode-2.51-7.el7.x86_64
May 18 04:07:40 Installed: perl-Text-ParseWords-3.29-4.el7.noarch
May 18 04:07:40 Installed: perl-Pod-Usage-1.63-3.el7.noarch
May 18 04:07:40 Installed: 4:perl-libs-5.16.3-294.el7_6.x86_64
May 18 04:07:40 Installed: 4:perl-macros-5.16.3-294.el7_6.x86_64
May 18 04:07:40 Installed: perl-Storable-2.45-3.el7.x86_64
May 18 04:07:40 Installed: perl-Exporter-5.68-3.el7.noarch
May 18 04:07:40 Installed: perl-constant-1.27-2.el7.noarch
May 18 04:07:40 Installed: perl-Time-Local-1.2300-2.el7.noarch
May 18 04:07:40 Installed: perl-Socket-2.010-4.el7.x86_64
May 18 04:07:40 Installed: perl-Carp-1.26-244.el7.noarch
May 18 04:07:40 Installed: 4:perl-Time-HiRes-1.9725-3.el7.x86_64
May 18 04:07:40 Installed: perl-PathTools-3.40-5.el7.x86_64
May 18 04:07:40 Installed: perl-Scalar-List-Utils-1.27-248.el7.x86_64
May 18 04:07:40 Installed: 1:perl-Pod-Simple-3.28-4.el7.noarch
May 18 04:07:40 Installed: perl-File-Temp-0.23.01-3.el7.noarch
May 18 04:07:40 Installed: perl-File-Path-2.09-2.el7.noarch
May 18 04:07:40 Installed: perl-threads-shared-1.43-6.el7.x86_64
May 18 04:07:40 Installed: perl-threads-1.87-4.el7.x86_64
May 18 04:07:41 Installed: perl-Filter-1.49-3.el7.x86_64
May 18 04:07:41 Installed: perl-Getopt-Long-2.40-3.el7.noarch
May 18 04:07:43 Installed: 4:perl-5.16.3-294.el7_6.x86_64
May 18 04:07:43 Installed: 2:vim-filesystem-7.4.160-5.el7.x86_64
May 18 04:07:46 Installed: 2:vim-common-7.4.160-5.el7.x86_64
May 18 04:07:46 Installed: gpm-libs-1.20.7-5.el7.x86_64
May 18 04:07:46 Installed: 2:vim-enhanced-7.4.160-5.el7.x86_64
(PRD)[root@centos7 log]#
(PRD)[root@centos7 log]#
(PRD)[root@centos7 log]#sed -n '/04:07:39/,/04:07:40/p' yum.log 
May 18 04:07:39 Installed: 1:perl-parent-0.225-244.el7.noarch
May 18 04:07:39 Installed: perl-HTTP-Tiny-0.033-3.el7.noarch
May 18 04:07:39 Installed: perl-podlators-2.5.1-3.el7.noarch
May 18 04:07:39 Installed: perl-Pod-Perldoc-3.20-4.el7.noarch
May 18 04:07:39 Installed: 1:perl-Pod-Escapes-1.04-294.el7_6.noarch
May 18 04:07:40 Installed: perl-Encode-2.51-7.el7.x86_64
(PRD)[root@centos7 log]#

7，sed 精確查詢時間段日誌

sed 過濾時間段日誌： sed -n \'/日誌開始時間/,/日誌結束時間/p\'yum.log 注意：這個開始時間，和結束時間必須在日誌中能夠精確記錄找到的。

7、表的列名與實體類列名不對應，如何將查詢結果封裝到實體類物件中

解決方法：（1）SQL語句用as關鍵字給列名取別名（2）用MyBatis提供的ResultMap標籤建立例項類與表之間的關係

mysql慢查詢，mysql慢查詢日誌

mysql慢查詢，mysql慢查詢日誌 ================================ ©Copyright 蕃薯耀 2020-11-27

thinphp+mysql 實現分表(不同表)日誌，group by，order by 查詢

主題列表：juejin, github, smartblue, cyanosis, channing-cyan, fancy, hydrogen, condensed-night-purple, greenwillow

四件 99 美元，蘋果 AirTag 追蹤器正式釋出：支援 iPhone 12 U1 裝置等精確查詢

4 月 21 日訊息在今天的蘋果春季新品釋出會上，蘋果釋出了 AirTag 追蹤器，這是一種類似 Tile 的藍芽追蹤裝置，旨在附在鑰匙和錢包等物品上進行追蹤，讓你在“查詢我的”應用程式中直接找到它們。

絕對神器，用 SQL查 Linux日誌，查詢效率高到飛起

大家好，我是小富~ 最近發現點好玩的工具，迫不及待的想跟大家分享一下。大家平時都怎麼查Linux日誌呢？像我平時會用tail、head、cat、sed、more、less這些經典系統命令，或者awk這類三方資料過濾工具，配合起來查

蘋果“查詢網路”第三方配件，Chipolo CARD Spot 上手：信用卡大小的“AirTag”，但沒有精確查詢

2 月 25 日上午訊息，Chipolo 是一家採用手機周邊配件廠商，他們之前製造過支援蘋果查詢網路 Find My 的產品 Chipolo ONE Spot，也是第一批支援查詢網路的第三方配件。近期他們推出了新品，定價 35 美元的 CARD Spot

華為追蹤器曝光：名為 HUAWEI Tag，支援超聲短距精確查詢定位

感謝網友會飛的小籠包的線索投遞！

MySQL進階實戰7，查詢的執行過程

@ 目錄一、拆分查詢二、分解關聯查詢三、查詢的執行過程四、優化器的一些優化手段

詳解MySQL資料庫--多表查詢--內連線，外連線，子查詢，相關子查詢

多表查詢使用單個select 語句從多個表格中取出相關的查詢結果,多表連線通常是建立在有相互關係的父子表上;

Java基礎開發之JDBC操作資料庫增刪改查，分頁查詢例項詳解

對資料庫的操作無非就是增刪改查，其中數查詢操作最為複雜，所以將查詢單獨講解，我這裡用的Mysql資料庫

Django admin 實現search_fields精確查詢例項

我就廢話不多說了，還是直接看程式碼吧！ search_fields = (u\'gift_rule_id\',u\'user_id\',u\'activity_id\',)

window環境搭建contos 7，而後xshell連結

ubantu 1、windows應用商店 2、開啟linux子系統控制面板\\所有控制面板項\\程式和功能》啟用或關閉windows功能》開啟【適用windows的linux子系統】》開啟》確定

《Java核心技術》筆記：第7章異常、斷言和日誌

1. 異常（P 280）異常處理需要考慮的問題：使用者輸入錯誤裝置錯誤物理限制

LibreOJ 6277 數列分塊入門 1(分塊區修，單點查詢)

題目連結解題思路分塊模版| 程式碼 const int maxn = 5e4+10; int n,sz,num,a[maxn],ls[maxn],rs[maxn],belong[maxn],lazy[maxn];

資料量很大，分頁查詢很慢，有什麼優化方案?

準備工作一般分頁查詢使用子查詢優化使用 id 限定優化使用臨時表優化關於資料表的id說明

SqlServer，分頁查詢（最簡單，新手必備！）

SqlServer，分頁查詢（最簡單，新手必備！） sqlserver資料庫在處理分頁資料時，不如mysql可以用limit來限制每次查詢的行數，智慧用top來進行查詢，這對於新手程式設計師來說，可能不是很容易來寫出來。本文分享一個

程式碼改造實錄--分頁查詢先限定條件再查詢，而非查詢後再加條件判斷

原來的程式碼： Outpatient outpatientQuery = new Outpatient(); outpatientQuery.setUserId(user.getId());

linux查詢作業系統資訊，CPU物理個數，CPU核心數，邏輯CPU數，記憶體資訊查詢，硬碟資訊查詢

目錄一.前言二.關於伺服器基本配置2.1 作業系統基本配置查詢2.2 CPU基本配置查詢2.3 記憶體基本配置查詢2.4 硬碟基本配置查詢

Laravel實現列表展示+redis優化+多條件精確查詢

控制器： public function lists(Request $request){ $where = []; //條件搜尋 if(!empty($request[\'type\'])){

7，sed 精確查詢時間段日誌

相關推薦