为老虎队喝彩～～

     大年三十的春晚，就像曹操嘴里的鸡肋，嚼在嘴里没什么味道，吐了又觉得牙齿就变得不是牙齿，是寂寞…
     至少今年的春晚，久违的小虎队又出现了。虽然严格意义上说，这三个在我小学时已经是高中生的帅哥倒可以被称为“老虎队”。但当他们登台唱歌，尤其是又唱起“蝴蝶飞呀”时，感觉自己仿佛刹那间失去了知觉：小学时蹲在音像店旁蹭听，课外活动时老师一句一句地教大家唱“贝壳爬上沙滩，看一看世界有多么大”……一切的一切，都一丝一丝地刺入大脑。
     不知为什么？！难道我也变得多愁善感了…

ORACLE databse can not start by missing tablespace file

     Today, as usual, trying to login to Oracle database do something, but when typing “sqlplus” and username/password, it showing:

     It seems like Oracle database was not starting somehow. After connect the database as SYSDBA, type some command for trying to restart the datadase:

     Now finally realized what happened and how this happened. There is a tablespace file “XXX.dbf” missing. To solve this issue, connect database as SYSDBA, then:

Create tablespace on NFS based LINUX + Oracle

     When the first time to create tablespace on SQLplus, it shows:

“ORA-27040: file create error, unable to create file. Linux-x86_64 Error: 13: Permission denied”

So I just change my home directory to “777”, then getting the error

“ORA-27054: NFS file system where the file is created or resides is not mounted with correct options”

     After check the “autofs” settings, I found the content of file “auto.home” has problem which is something wrong with NFS mount options. The solutions is change the original content

* -fstype=nfs,soft,intr,rsize=8192,wsize=8192,nosuid,tcp oracle.server.com:/users/&

to

* -rw,bg,hard,intr,rsize=32768,wsize=32768,suid,nfsver=3,tcp oracle.server.com:/users/&

Google的手机：Nexus One

     尽管Steve Jobs在IPad发布会上忍不住大骂Google背信弃义，Google的Nexus One依然是众多人追捧的对象。与之iPhone相比，multitask是其最大亮点。Google为了让这一亮点突出，特意在Nexus One上使用1Ghz的CPU和512MB的内存。在看了测评后，发现Google的这一用心良苦果然在Nexus One的运行速度上得到了回报：

SSH + X11 display after su to another user

     Sometimes we need to run the X11 application window via SSH. For example, I am user “A”, and SSH to host “example”. To be possible running X11 application window, we need to type the command:

#ssh -Y A@example

     In addition to the SSH restriction, we need to run an X application as someone other than yourself. For example, the Virtualbox can be only run by user “B”. If the user “A” can sudo to become user “B” or “A” is the root, in order to allow user “B” access to user “A”’s display, B needs to import “A”’s .Xauthority cookie. We can use xauth to accomplish this and it’s a quick one-liner before sudo su - B:

     A@example:~#xauth extract – :`echo $DISPLAY |awk -F: ‘{print $2}’` | sudo su – B -c “/usr/bin/xauth merge -”
     A@example:~#sudo su – B
     B@example:~#VirtualBox &