Troubleshooting
Question As I don't know the openssl command's arguments by heart, I am used to referring to the same SO answer whenever I need to create self-signed certificates (for testing environments). The command looks like: openssl req -x509 -nodes -newkey rsa:2048 -keyout mysite.key -out
Troubleshooting
查看 Linux TCP Port 被哪隻程式(Process)佔用, 可以用下述的命令: * sudo lsof -i * sudo lsof -i | grep TCP * sudo lsof -i :80 | grep LISTEN * sudo netstat -lptu * sudo netstat -tulpn * sudo ls -l /proc/$pid/exe 列出此 TCP Port 目前有哪些 PID * sudo fuser 80/tcp # 會把目前使用此 Port 的 PID 全部列出
backup
Problem Steps to remove NetBackup Media Server Deduplication Pool (MSDP) configuration from a NetBackup environment Solution Warning: These steps will expire all images associated with the MSDP that is to be removed! Note: For NetBackup version 7.0.1, the script in step 13 is only available with the latest
Network
觀察DNS，TCPIP，FQDN，Domain，Port，開啟的應用程式網路工具介紹 介紹四個工具 DNSQuerySniffer SmartSniff TCPLogView TCPView 電腦網路觀察封包的活動 當然如果你會 Wireshark 或是 Microsoft Network Monitor 那更好 但是通常 iT/MIS 不需要用到這麼細的工具 只要可以觀察 那些應用程式開啟了那些 Remote Port Remote IP Domain FQDN 封包的種類 大概就夠了 因此這四個工具也夠用了 相關下載位置請自行Google 當然學會怎麼看 和學會怎麼使用 那就請好好Google學習了 門神JanusLin
backup
Problem DOCUMENTATION: How to troubleshoot frozen media on UNIX and Windows Solution Modification: When troubleshooting frozen media issues, it is important to understand the following: * Media must be unfrozen one at a time. * A media being frozen does not necessarily mean that the media in question is defective. Freezing media
Hardware
http://cj6m3.pixnet.net/blog/post/27468996-%E3%80%8Aipmi%E6%8C%87%E4%BB%A4%E6%94%B6%E9%9B%86%E3%80%8B- 所有IPMI的功能都是向BMC發送另完成，BMC接收發生在系統事件記錄中 首先，確認system有無支援IPMI #rpm –aq|grep –I ipmi # ipmitool -I open <command> 以下為IOL下的指令： # ipmitool -I <lanplus> -H <hostname>
Dell
How to reboot an DELL idrac when web page refuse access: Connect to idrac IP using ssh with the password refused by web page $ ssh root@192.168.0.120 root@192.168.0.120's password: The magic DELL tool is here : radadm /admin1-> racadm =============================================================================== RACADM version
Troubleshooting
Ubuntu command rdesktop-vrdp <IP> Failed to connect, CredSSP required by server Solution On DOS mode execute below command reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v UserAuthentication /t REG_DWORD /d 0 /f
Hardware
S.M.A.R.T.，全稱為「Self-Monitoring Analysis and Reporting Technology」，即「自我監測、分析及報告技術」。是一種自動的硬碟狀態檢測與預警系統和規範。透過在硬碟硬體內的檢測指令對硬碟的硬體如磁頭、碟片、馬達、電路的執行情況進行監控、記錄並與廠商所設定的預設安全值進行比較，若監控情況將或已超出預設安全值的安全範圍，就可以透過主機的監控硬體或軟體自動向使用者作出警告並進行基本的自動修復，以提前保障硬碟資料的安全。除一些出廠時間極早的硬碟外，現在大部分硬碟的均配備該項技術。 歷史 最早期的硬碟監控技術起源於1992年IBM在為AS/400電腦的IBM9337硬碟陣列中的IBM 0662 SCSI2代硬碟機之中，後來該技術被命名為Predictive Failure Analysis（故障預警分析技術），它是透過在韌體中測量幾個重要的硬碟安全參數和評估他們的情況。從物理硬碟傳送到監控軟體的結果中被限定兩種結果：「硬碟安全」和「硬碟不久後會發生故障」。 不久，由系統製造商Compaq和硬碟製造商Seagate、Quantum和Co
Server
http://lnav.readthedocs.org/en/latest/index.html Command Reference This reference covers the commands used to control lnav. Consult the built-in help in lnav for a more detailed explanation of each command. Note that almost all commands support TAB-completion for their arguments, so if you are in doubt as
Troubleshooting
Posted on Monday, January 12, 2015 by Mandar Shinde TeamViewer is the most popular application that is mostly used to connect to any remote desktop around the world from your own system. Besides remote controlling TeamViewer can be used for desktop sharing, online meetings, web conferencing and file transfer between
Dell
今日打開 Chrome 瀏覽器（版本 45.0.2454.85 m）瀏覽公司內部資訊系統，發現有很多 HTTPs 網站都出現「伺服器的暫時 Diffie-Hellman 公開金鑰不足 (ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY)」的警告，而且 Chrome 為了確保連線通訊的安全性，強制不允許存取這些不安全的網站。 無獨有偶，本人開發的一個小系統網站竟然也中獎了，被 Chrome 判定不安全，而無法存取。還好，網路上很容易就找到相關資訊，花了幾分鐘就把這資安問題解決了。解決方法非常簡單，以 Tomcat 6.0 版本為例，只需修改/conf/server.xml 檔案，將 ciphers