Extra Packages for Enterprise Linux (EPEL)

About EPEL
EPEL was started because many Fedora contributors wanted to use the Fedora packages they maintain on Red Hat Enterprise Linux (RHEL) and its compatible derivatives.

Goals of the EPEL Effort
Make high quality packages that have been developed, tested, and improved in Fedora available for RHEL and compatible derivatives such as CentOS and Scientific Linux.

Work closely with the Fedora Project to achieve this goal -- use the same guidelines, rules, policies, and infrastructure, as far as possible.

If we hit problems, solve the problems with the other parties and groups of Fedora, such as Packaging Committee, instead of creating EPEL-only solutions; EPEL-only solutions introduce confusion for packagers and users, and make porting packages between Fedora and EPEL harder.

For the rare cases where it is not possible or desired to remain synchronized with Fedora, maintain add-on documents for EPEL that describe the differences and the reasons for them.

以上取自 Fedora Project Wiki : https://fedoraproject.org/wiki/About_EPEL

2013 年 Taipei 101 跨年煙火

2013 年 Taipei 101 跨年煙火

Setup Subversion Server configure on CentOS

設定 Subversion Server

因為這裡是以 Apache 的模組型式在執行，
所以其設定檔為
/etc/httpd/conf.d/subversion.conf

Install subversion for CentOS 5.6

什麼是 Subversion ?

Subversion 是一個自由/開放源碼的版本控制系統, 也就是說 Subversion 管理著隨時間改變的檔案. 這些檔案放置在一個中央 檔案庫 (repository) 中. 這個檔案庫 很像一個尋常的檔案伺服器, 不過它會記住每一次檔案的變動. 這樣你就可以把檔案回復到舊的版本, 或是瀏覽檔案的變動歷程. 許多人會把版本控制系統想像成某種 “時光機器”. 

某些版本控制系統也是 software configuration management (SCM) 系統. 這些系統是特別設計來管理大量程式碼的, 而且具有許多功能, 專門用在軟體發展之用 — 像是可完全了解程式語言, 或是提供編譯軟體的工作. 不過 Subversion 並不是這樣的系統; 它是一個泛用系統, 可用來管理任何 類型的檔案, 其中包括了程式源碼.
(此文出自 http://www.iq180.com.tw/2012/06/version-control-with-subversion-1411m.html)

Just A Dream - Sam Tsui & Christina Grimmie

Version Control with Subversion - 1411M - Big5

Version Control with Subversion

Draft Revision 1411M

Ben Collins-Sussman

Brian W. Fitzpatrick

C. Michael Pilato

(TBA)

ps. 本文轉載自 http://svn.ntcu.net/svnbook/

ps. William 下載自 http://twpug.net/docs/Subversion/

Kickstart auto Installations

Many system administrators would prefer to use an automated installation method to install Red Hat Enterprise Linux on their machines. To answer this need, Red Hat created the kickstart installation method. Using kickstart, a system administrator can create a single file containing the answers to all the questions that would normally be asked during a typical installation.

Kickstart files can be kept on a single server system and read by individual computers during the installation. This installation method can support the use of a single kickstart file to install Red Hat Enterprise Linux on multiple machines, making it ideal for network and system administrators.

Kickstart provides a way for users to automate a Red Hat Enterprise Linux installation.

DHCP Server

DHCP (Dynamic Host Configuration Protocol)

動態主機設定協議


就是讓使用者不必手動設定電腦的網卡資訊(IP , etc.) , 由DHCP Server 來自動指定 .

Rescue mode (救援模式)

有的時候 ,
Linux 主機硬碟中某一 partition 壞了 , 或 系統被 cracker 破壞了 ,
或 系統管理員 ....... 不小心 ...........  ................... 等等 ...


而造成 Linux 系統無法正常啟動 ,
這時 , 我們可以進入救援模式 ,

"嘗試" 修復系統 .....

或
"嘗試" 救出重要卻沒備份的資料 .....

login to single mode

有些時候 , 出了點狀況 ,
可能是管理人員忘記 Linux 系統的 “最高權限使用者”(root) 的密碼 ,
可能是開機開到某個 Service 時 , 系統就會當掉等等………..
這些個時候 , 我們可以用進入單人模式(Single Mode) , 來除錯 .