What are the FORWARD policy and NAT Rules?
Most organizations are allotted a limited number of publicly routable IP addresses from their ISP. Due to this limited allowance, administrators must …
Starting a Kickstart Installation
To begin a kickstart installation, you must boot the system from a Red Hat Linux boot diskette, Red Hat Linux boot CD-ROM, …
Mac terminal tips
# mount filesystem writeable (single user mode) fsck -fy mount -uw / # install dmg in terminal hdiutil attach MacOSXxxx.dmg installer -verbose …
Fix the MBR in Windows XP
Boot from the windows XP CD, press the “R” key in the setup in order to start the restoration console. Select your …
How to flush dns cache?
如何清除蘋果的 dns 快取? # lookupd -flushcache # dscacheutil -flushcache
TUAW Tip: Drag and drop with Exposé
Drag and drop is one of the many wonders of graphical user interfaces, exponentially increasing productivity with an intuitive, common-sense approach that …
One-Step Tutorial: Getting started with LAM
Booting LAM The user creates a file listing the participating machines in the cluster. shell$ cat lamhosts # a 2-node LAM node1.cluster.example.com …
Vi : Search and Replace
Change to normal mode with escape key. Search: Search STRING forward : /STRING Search STRING backward: ?STRING. Repeat search: n Repeat search …
/etc/fstab
## 編輯 /etc/fstab 檔案 /dev/sda1 /mnt/usbdrive ext3 noauto,user,kudzu 0 0 # 使用外接usb.讓其他使用者可以自由掛載(mount) USB硬碟 /dev/sda2 /mnt/dos vfat users,umask=000 0 0 # 讓其他使用者有權限寫入,掛載 Windows …
如何建置比較安全的遠端桌面
開放遠端桌面的確很方便.你可以隨時隨地使用你家中的電腦.但是你必須要承擔一些風險. 假設你的遠端桌面軟體沒有提供密碼加密功能.那就會很危險了.這篇文章主要讓大家了解如何用 ssh tunnel. 簡單來說就是利用加密的技術.來防範有心人士的攔截. 材料 : RealVNC (Free Edition), Putty, ssh server, 防火牆 首先你要先有 ssh server.如果你那裡沒有 linux 的機器那我要跟你說抱歉了. 如果你是微軟使用者,那你可能要花錢去買 ssh server …