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Server
VMware Appliance default usernames and passwords published by Rob Bastiaansen on Thu, 11/14/2013 – 19:11 VMware offers many appliances for their products. Unfortunately they are not all created equally. The installation and configuration procedures differ for most appliances and also the default usernames and passwords are different throughout
configuration
由 nepgb 在 三, 01/15/2014 – 10:35 發表 01. 在網上找尋一下，您會知道需要安裝一個叫xrdp的套件。 sudo apt-get install xrdp 02. 在Ubuntu的電腦中，打開左上角的圖示『Search your computer and online sources』，尋找『desktop』，選擇『Desktop Sharing』。 03. 啟動『Sharing』選項。 04. 返回Windows 7中，選擇『開始』、『所有程式』、『附屬應用程式』、『遠端桌面連線』。 05. 輸入Ubuntu的IP地址，後面需加上埠位數值『:3389』。 06. 會出現『無法驗證遠端電腦』
database
https://docs.oracle.com/cd/B28359_01/server.111/b28310/diag001.htm#ADMIN11257 Alert Log The alert log is an XML file that is a chronological log of database messages and errors. It is stored in the ADR and includes messages about the following: * Critical errors (incidents) * Administrative operations, such
configuration
by Eric Jenkinson on April 8, 2010 Categories: Backup and Recovery Tagged: archive log, redo log Note: It is recommended to perform a backup of the database (after a shutdown normal or immediate) prior to changing the archive status of a database. If you would like to perform these tasks
file system
First, follow up the page link http://wiki.centos.org/HowTos/BuildingKernelModules to understand basically kernel source make knowledge. Example Commands. #cd ~/rpmbuild/BUILD/kernel-2.6.18/linux-2.6.18.i686 #cp /boot/config-2.6.32-504.16.2.el6.i686 .config #cp /usr/src/kernel/`uname -r`/Makefile . #make menuconfig
configuration
RHEL6 一般必需註冊(免費 30 天評估或付費)才可以獲得線上軟體更新支援及下載, 不註冊的話其實亦可以使用光碟來執行 yum 安裝, 此方法適合多台電腦進行評估測試時免去大量註冊所需, 及沒有聯網環境的獨立電腦, 而且多台電腦亦可以共用光碟分享位置(無需大量燒錄光碟)來安裝軟體, 當然如果要更新軟體的話就必需付費註冊(除非手動自行編譯更新源碼套件)。 RHEL6 使用 yum 光碟安裝軟體步驟: 1. 掛載 RHEL6 光碟 # mkdir /mnt/cdrom # mount /dev/cdrom /mnt/cdrom -t iso9660 -o loop,ro 2. 將光碟內的 media.repo 檔案內容複製到 /etc/yum.repos.d/media.repo # cat /mnt/
Benchmark
You can get OpenSSL to encrypt /dev/zero with a randomized password, giving decent pseudorandom data very fast (if your CPU supports accelerating it). openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64)" -nosalt </dev/zero | dd of=
Bike
Browser
Problem: Whenever you access any website from a specific domain. For example http://www.abc.com/morepages/…. In the URL above, the domain is “abc.com” and “morepages” is a sub-site. The problem shows as the following: Bad Request Your browser sent a request that this server could not understand.
HOWTO: Using Dell iDRAC 7 Lifecycle Controller 2 to update Dell PowerEdge R420, R620, and R720 servers Newer Dell Servers have an option as part of their iDRAC v7 (Dell Remote Assistance Controller) to include a “Lifecycle Controller” v2. This feature can be utilized to provide updates to all firmware
Benchmark
因工作需要找一個可以取代IOmeter業界慣用的IO效能評測軟體，過去為了某些測試有初略使用了fio 這個軟體，現在要來進階了。之前用的版本是1.5.x版，現在用的是2.0.7版這兩版在測試結果的輸出上欄位不同，2.0.7版多了更多欄位這裡不細述。 為了方便定義出多種測試pattern，決定使用參數的方式而不用profile file，範例如下： fio –name=$name –rw=${iomode} –direct=1 –ioengine=libaio –runtime=30s –ioscheduler=noop –filename=/dev/$target –bs=${block} –size=80% –iodepth=${iodepth} –zonesize=$[size/stream]k –numjobs=$stream –group_reporting –minimal >>
configuration
$vim /etc/multipath.conf defaults { udev_dir /dev polling_interval 10 max_fds 8192 fast_io_fail_tmo 80 dev_loss_tmo 600 user_friendly_names yes } blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" devnode "^hd[a-z]" devnode "^sda[0-9]