vmware

problem: No Permission to access this virtual machine

answer:

change owner of each file of virtual machine

ex:

sudo chown  -R ${USER}  *

redirect output

use >

> should be preceded with a number, such as 2>  , but default is 1 if no number

ex:

ls > output

equals   

ls  1> output

ex:

Sending Both Output and Error Messages to Different Files

test 1> messages.out  2> message.err 

or 

test > messages.out  2> message.err 

2 means STDERR

add & after >:

means the output is redirected to a file descriptor

ex:

ls >& 2

write STDOUT & STDERR to the same place:

ex:

ls >& outfile 

or 

ls > outfile 2>&1 

run the command in the background

put & after command:

ex:

ls &

/dev/null

/dev/null:

throwing output away,  redirect output to /dev/null

ex:

ls > /dev/null

輸入法

open vanilla 

嘸蝦米

Liu3.cin

本機硬碟>>資料庫>>OpenVanilla>>0.7.2>>Modules>>OVIMGeneric 

safari bookmark

Users/deeplove/Library/Safara/Bookmarks.plist

IOIteratorNext

iterator must be released

the element got from IOIteratorNext must be released 

ex:

ele= IOIteratorNext(iter)

while(ele != IO_OBJECT_NULL){

   IOObjectRelease(ele);

   ele = IOIteratorNext(iter);

}

IOObjectRelease(iter);

ioclasscount

the instance count of the class

useful for tracking leaks

google code hosting server

http://code.google.com/hosting/

zip command

zip -r data.zip .

This copies the current directory, including all subdirectories into data.zip 

startup item

start the application in the startup item:

/sbin/SystemStarter start "Test"

organized widget

a widget for

1. clock

2. note

3. event

4. to do