問題
輸入 ifconfig 卻找不到命令，出現 bash: ifconfig: command not found

解法
通常這是因為 ifconfig 的路徑並未定義在 $PATH 裡，所以找不到。

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今天在 centos 5.8 上面要安裝 svn 時，發生了以下錯誤

# yum -y install mod_dav_svn subversion
=====================================================================================================================================Package                                                    Arch                                              Version                                                        Repository                                                 Size
=====================================================================================================================================Installing:
mod_dav_svn                                                x86_64                                            1.6.11-10.el5_8                                                base                                                       79 k
subversion                                                 i386                                              1.6.11-10.el5_8                                                base                                                      3.1 M
subversion                                                 x86_64                                            1.6.11-10.el5_8                                                base                                                      3.2 M
Installing for dependencies:
apr                                                        i386                                              1.2.7-11.el5_6.5                                               base                                                      124 k
apr-util                                                   i386                                              1.2.7-11.el5_5.2                                               base                                                       80 k
neon                                                       i386                                              0.25.5-10.el5_4.1                                              base                                                      101 k
postgresql-libs                                            i386                                              8.1.23-6.el5_8                                                 base                                                      197 k
sqlite                                                     i386                                              3.3.6-6                                                        base                                                      213 k
Updating for dependencies:
apr                                                        x86_64                                            1.4.5-1.jason.1                                                utterramblings                                            260 k
postgresql-libs                                            x86_64                                            8.1.23-6.el5_8                                                 base                                                      197 k
sqlite                                                     x86_64                                            3.3.6-6                                                        base                                                      207 k

Transaction Summary
=====================================================================================================================================Install       8 Package(s)
Upgrade       3 Package(s)

Total size: 7.8 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test


Transaction Check Error:
  package apr-util-1.3.12-1.jason.1.x86_64 (which is newer than apr-util-1.2.7-11.el5_5.2.i386) is already installed

Error Summary
-------------

上網找到的解法是，先將 apr-util-1.3.12-1.jason.1.x86_64 強制移除後，再重新安裝就可以了
# rpm -e  --nodeps apr-util-1.3.12-1.jason.1.x86_64
# yum -y install mod_dav_svn subversion

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指令
vim -d/tmp /1.txt  /tmp/2.txt

功能
比較兩個檔案的差異，也有 vim 的高度顯示，更可以直接進行編輯

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問題
今天接到客戶回報，說寄信的時候會看到這個錯誤訊息
上網搜尋了一下，發現大意是說 domain name 找不到

解決方法

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  • 個人分類：PHP
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前言
在 RPM 規格之前，在 linux 上安裝軟體都必須使用原始碼編譯的方式，而現在未被 centos 支援的軟體，仍需要做編譯的動作

htop 安裝步驟

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安裝套件
# yum install 套件名稱
可以使用 yum -y install 默認同意下載並安裝

更新套件

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安裝套件
# rpm -ivh *.rpm
i 安裝(install)
v 顯示細節
h 顯示 Hash 碼

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** 這在寫 shell script 的時候很好用 **

取得格式化的時間
# date +"%Y-%m-%d %H:%M:%S"
2013-02-15 16:07:53

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本篇內容為參考保哥的部落格所做的筆記，詳細的說明請參考
http://blog.miniasp.com/post/2012/06/23/apache2-Could-not-reliably-determine-the-server-fully-qualified-domain-name-using-for-ServerName.aspx

狀況：
apache 啟動時出現錯誤訊息 Could not reliably determine the server's fully qualified domain name

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請參考：http://www.cyberciti.biz/faq/centos-fedora-rhel-iptables-open-nfs-server-ports/


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