Apache 內建的Web壓力測試工具 ApacheBench (ab, ab2)
官方使用說明：ab - Apache HTTP server benchmarking tool (Apache 2.2) 簡易說明： ApacheBench 的使用很簡單，基本上有裝 Apahce 就會有，直接以 ab 或 ab2 作為指令使用就可以了。(注意有些 Linux 版本的指令是 ab2) 情況一：公司要測試網站能否達到「首頁同時1,000人連線，平圴反應時間 5 秒以下。」...
View ArticleLinux 常用指令：cat, cd, chmod, chown, cp, cut, date, find, less, ln, locate, ls &...
1. User accounts2. User Files (/home)3. Database (PostgreSQL)4. Apache5. PHP6. crontab7. cat：輸出檔案內容至螢幕或檔案8. cd：更換所在目錄/Change Directory9. chmod：設定檔案及目錄讀取屬性及狀態/Change Mode of File or Direcotry10. chown：...
View Articledmidecode：在 Linux 中查詢系統硬體資訊的指令(利用BIOS)
簡要說明： Shell> dmidecode -t processor --> CPU 詳細資訊 Shell> dmidecode -t memory --> Memoery 資訊 Shell> dmidecode -t/--type --> 列出所有 type 選項 實例介紹： 我們在很多情況都需要知道 Linux...
View Article[HOW TO] Find the IP Address of Your Linux Server: ifconfig
Basically it's very easy to lookup the IP address of your Linux server even if you are not very familiar with the black-and-white command line. Simply type ifconfig in the command line prompt:...
View Article[HOW TO] Auto Reconnect in ADSL/DSL with Script (Debian/SuSE)
1. The Script: (Just copy it and vi /usr/bin/repppoe) Script for Debian: #!/bin/bash if !ping -c 3 www.google.com > /dev/null 2>&1 then #/usr/bin/poff #/usr/bin/pon dsl-provider /usr/bin/pon...
View Article如何禁止從遠端(SSH)以ROOT登入：修改 /etc/ssh/sshd_config
1. 找到檔案 /etc/ssh/sshd_config 2. 修改其中的 #PermitRootLogin yes 改為 PermitRootLogin no (注意開頭不要有井字號 #) 3. 重新啟動 SSH /etc/rc.d/sshd restart Reference:...
View ArticleSome notes about linux administration (SUSE)
Two ways to create a symbolic link (from link-to-file1 to file1): 1. ln -s file1 link-to-file1 2. cp -s file1 link-to-file1 The configuration files of syslog-ng: 1. /etc/sysconfig/syslog 2....
View ArticleBackup and Transfer a LAMP(LAPP) System: Linux/Apache2/PostgreSQL/PHP
1. User accounts2. User Files (/home)3. Database (PostgreSQL)4. Apache5. PHP6. crontabAssume we have an installed Linux system on hand. We have six parts to transfer: (1) User accounts; (2) User files...
View ArticleInstall a LAPP server: openSUSE 13.2/Apahce 2.4/PostgreSQL 9.4/ PHP 5.6
1. Disk Partition2. Install PostgreSQL 9.43. Services Autostart at Boot4. Security5. Apache6. PHP7. FirewallThe parts of this install article: (1) Disk partiton; (2) Install PostgreSQL 9.4; (3) Auto...
View ArticleMake SSH Login without Password and Troubleshot it
1. Generate Key Pair Shell> ssh-keygen Do not enter the passphrase and your will see:Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter...
View ArticleInstall a LAPP Stack (Apache 2.4/PHP 7/PostgreSQL 10/MariaDB 10) on openSUSE...
Assume the Tumbleweed linux is ready. I. Database Install the database first (PostgreSQL 10): 1. Install database zypper install postgresql10 postgresql10-contrib postgresql10-server 2. Enable...
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DNS設定反查與偵錯：dig指令深入使用
一、目的 當DNS查詢出現錯誤無法解析出正確IP，經由以下方式，可以查出於整個DNS查詢路徑中，錯誤出在那一階段的DNS主機以及DNS記錄錯誤為何。 二、原理與流程 以下我們以查詢 www.ntu.edu.tw 之 IP 作為例子說明查詢的原理與流程。 1. 慣用DNS伺服器：作業系統之DNS查詢首先從詢問「慣用DNS伺服器」開始，一般我們會設定為 Google 的 DNS (8.8.8.8)...
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